About Shoulder Screws
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About Flat Head Screws
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About Rounded Head Screws
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About Socket Head Screws
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Left-Hand Threaded Alloy Steel Socket Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. Length is measured from under the head.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Screws that meet ASTM A574 comply with specifications and testing requirements for material quality. Screws that meet ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing  | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Each | |
Black-Oxide Alloy Steel | |||||||||
6-32 | |||||||||
| 3/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 170,000 | ASTM A574 | 000000000 | 000000 |
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 170,000 | ASTM A574 | 000000000 | 00000 |
8-32 | |||||||||
| 1/2" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 170,000 | ASTM A574 | 000000000 | 00000 |
10-32 | |||||||||
| 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 1" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 5/8" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
5/16"-18 | |||||||||
| 3/4" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
3/8"-16 | |||||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 3/8" | 5/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 9/16" | 3/8" | 5/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 9/16" | 3/8" | 5/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
1/2"-13 | |||||||||
| 1" | Fully Threaded | Coarse | 3/4" | 1/2" | 3/8" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 1/2" | 3/8" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/4" | 1/2" | 3/8" | 170,000 | ASTM A574 | 000000000 | 00000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Dia., mm | Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Each | |
Black-Oxide Class 12.9 Alloy Steel | ||||||||||
M4 × 0.7 mm | ||||||||||
| 6 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 000000 |
| 8 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 10 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 12 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 16 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||||
| 12 | Fully Threaded | __ | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 16 | Fully Threaded | __ | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Partially Threaded | 22 | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M6 × 1 mm | ||||||||||
| 12 | Fully Threaded | __ | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 16 | Fully Threaded | __ | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Partially Threaded | 24 | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Partially Threaded | 24 | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M8 × 1.25 mm | ||||||||||
| 16 | Fully Threaded | __ | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Fully Threaded | __ | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Partially Threaded | 28 | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 35 | Partially Threaded | 28 | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 40 | Partially Threaded | 28 | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M10 × 1.5 mm | ||||||||||
| 20 | Fully Threaded | __ | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Fully Threaded | __ | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Fully Threaded | __ | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 35 | Partially Threaded | 32 | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 40 | Partially Threaded | 32 | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M12 × 1.75 mm | ||||||||||
| 25 | Fully Threaded | __ | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Fully Threaded | __ | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 40 | Partially Threaded | 36 | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 50 | Partially Threaded | 36 | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
Left-Hand Threaded 18-8 Stainless Steel Socket Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Each | |
18-8 Stainless Steel | ||||||||
8-32 | ||||||||
| 3/8" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 000000000 | 000000 |
| 1/2" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 000000000 | 00000 |
10-32 | ||||||||
| 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 000000000 | 00000 |
1/4"-20 | ||||||||
| 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
Left-Hand Threaded Flat Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
4-40 | ||||||||
| 1/4" | Fully Threaded | 0.255" | 0.083" | 1/16" | 70,000 | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.255" | 0.083" | 1/16" | 70,000 | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 1/4" | Fully Threaded | 0.307" | 0.097" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.307" | 0.097" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
8-32 | ||||||||
| 1/2" | Fully Threaded | 0.359" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.359" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 00000 |
10-32 | ||||||||
| 1/2" | Fully Threaded | 0.411" | 0.127" | 1/8" | 70,000 | 1 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.411" | 0.127" | 1/8" | 70,000 | 1 | 000000000 | 0000 |
1/4"-20 | ||||||||
| 1/2" | Fully Threaded | 0.531" | 0.161" | 5/32" | 70,000 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.531" | 0.161" | 5/32" | 70,000 | 1 | 000000000 | 0000 |
Metric Left-Hand Threaded Flat Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
| Lg., mm | Threading | Head Dia., mm | Head Ht., mm | Drive Size, mm | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
M3 × 0.5 mm | ||||||||
| 6 | Fully Threaded | 6.00 | 1.70 | 2 | 70,000 | 5 | 000000000 | 00000 |
| 10 | Fully Threaded | 6.00 | 1.70 | 2 | 70,000 | 5 | 000000000 | 00000 |
M4 × 0.7 mm | ||||||||
| 8 | Fully Threaded | 8.00 | 2.30 | 2.5 | 70,000 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | 8.00 | 2.30 | 2.5 | 70,000 | 5 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||
| 10 | Fully Threaded | 10.00 | 2.80 | 3 | 70,000 | 1 | 000000000 | 0000 |
| 16 | Fully Threaded | 10.00 | 2.80 | 3 | 70,000 | 1 | 000000000 | 0000 |
M6 × 1 mm | ||||||||
| 12 | Fully Threaded | 12.00 | 3.30 | 4 | 70,000 | 1 | 000000000 | 0000 |
| 20 | Fully Threaded | 12.00 | 3.30 | 4 | 70,000 | 1 | 000000000 | 0000 |
M8 × 1.25 mm | ||||||||
| 16 | Fully Threaded | 16.00 | 4.40 | 5 | 70,000 | 1 | 000000000 | 0000 |
| 25 | Fully Threaded | 16.00 | 4.40 | 5 | 70,000 | 1 | 000000000 | 0000 |
Metric Left-Hand Threaded Button Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
| Lg., mm | Threading | Head Dia., mm | Head Ht., mm | Drive Size, mm | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
M3 × 0.5 mm | ||||||||
| 6 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 00000 |
| 8 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 0000 |
| 10 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 0000 |
| 12 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 00000 |
M4 × 0.7 mm | ||||||||
| 8 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 0000 |
| 10 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||
| 10 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 0000 |
| 12 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 00000 |
| 20 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 00000 |
M6 × 1 mm | ||||||||
| 10 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
| 20 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
Left-Hand Threaded Button Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
4-40 | ||||||||
| 1/4" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 3/8" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 00000 |
8-32 | ||||||||
| 3/8" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 00000 |
10-32 | ||||||||
| 3/8" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 00000 |
1/4"-20 | ||||||||
| 3/8" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
Left-Hand Threaded Shoulder Screws
Tighten these shoulder screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. They’re often used to guide or align components, and as an axle or pivot point.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg. | Thread Size | Thread Lg. | Head Dia. | Head Ht. | Material | Tensile Strength, psi | Drive Size | 1-4 | 5-Up | |
1/8" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/8" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 00000 | 00000 |
| 3/16" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 1/4" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 3/8" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 1/2" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
5/32" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/8" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/16" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/4" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/8" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/2" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
3/16" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/8" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/16" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/4" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/8" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/2" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/4" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
1/4" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/8" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1/2" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 5/8" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/4" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
5/16" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 3/8" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 1/2" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 5/8" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 3/4" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 1" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
3/8" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/2" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 3/4" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 1" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 1 1/2" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 2" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
1/2" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/2" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 3/4" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 1" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 1 1/2" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 2" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 00000 | 0000 |
Screws for Carbide Insert Holders
When it's time to replace the screws in a carbide insert holder, use the reference number on your holder to find the right size.
Clamp screws hold insert clamps at the proper height for tooling.
For technical drawings and 3-D models, click on a part number.
| Lg. | Reference No. | Right-Hand Thread Lg. | Left-Hand Thread Lg. | Drive Style | Drive Size | Material | Min. Rockwell Hardness | Thread Fit | Each | |
10-32 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.59" | CS-205 | 0.19" | 0.19" | Hex × Hex | 3/32" | Steel | C42 | Class 3A | 000000000 | 00000 |
| 3/4" | CS-220 | 0.25" | 0.25" | Hex × Hex | 3/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 0.84" | CS-228 | 0.31" | 0.31" | Hex × Hex | 3/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 7/8" | CS-230 | 0.5" | 0.25" | Hex × Hex | 3/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
1/4"-28 | ||||||||||
| 0.69" | CS-306 | 0.28" | 0.28" | Hex × Hex | 1/8" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 0.81" | CS-320 | 0.28" | 0.28" | Hex × Hex | 1/8" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 0.81" | CS-321 | 0.28" | 0.28" | Hex × Hex | 3/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 1" | CS-330 | 0.37" | 0.37" | Hex × Hex | 1/8" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 1.16" | CS-335 | 0.45" | 0.45" | Hex × Hex | 1/8" | Steel | C42 | Class 3A | 000000000 | 0000 |
1/4"-32 | ||||||||||
| 0.564" | CS-304 | 0.221" | 0.221" | Hex | 1/8" | Steel | C42 | Class 3A | 000000000 | 0000 |
5/16"-24 | ||||||||||
| 1" | CS-410 | 0.25" | 0.5" | Hex × Hex | 5/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 1.12" | CS-420 | 0.41" | 0.47" | Hex × Hex | 5/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 1.156" | CS-425 | 0.406" | 0.5" | Hex × Hex | 5/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
| 1 1/4" | CS-430 | 0.5" | 0.5" | Hex × Hex | 5/32" | Steel | C42 | Class 3A | 000000000 | 0000 |
5/16"-32 | ||||||||||
| 1 1/4" | CS-416 | 0.375" | 0.375" | Hex | 5/32" | Steel | C42 | Class 3A | 000000000 | 0000 |