ASME B18.2.3.1M Screws | McMaster-Carr

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46 Products

About Hex Head Screws and Bolts

Fully Threaded

Partially Threaded

These Class 8.8 steel screws are suitable for fastening most machinery and equipment. Dimensions meet ISO (formerly DIN) or DIN specifications. Length is measured from under the head.

Zinc-plated steel screws resist corrosion in wet environments. Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch.

For technical drawings and 3-D models, click on a part number.

				Head
Lg., mm	Threading	Min. Thread Lg., mm	Thread Spacing	Wd., mm	Ht., mm	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
Zinc-Plated Class 8.8 Steel
M5 × 0.8 mm
18	Fully Threaded	__	Coarse	8	3.5	110,000	ASME B18.2.3.1M, ISO 4017, DIN 933	5	000000000	00000
M6 × 1 mm
15	Fully Threaded	__	Coarse	10	4	110,000	ASME B18.2.3.1M, ISO 4017, DIN 933	5	000000000	00000
75	Partially Threaded	18	Coarse	10	4	110,000	ASME B18.2.3.1M, ISO 4014, DIN 931	5	000000000	00000
M8 × 1.25 mm
15	Fully Threaded	__	Coarse	13	5.3	110,000	ASME B18.2.3.1M, ISO 4017, DIN 933	5	000000000	00000

Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws

These Class 8.8 steel screws are suitable for fastening machinery and equipment. Tighten them by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Material meets ISO 898-1 specifications for quality. Dimensions meet ASME B18.2.3.1M specifications. Length is measured from under the head.

Zinc-plated steel screws resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

		Head
Lg., mm	Threading	Wd., mm	Ht., mm	Thread Spacing	Tensile Strength, psi	Specifications Met		Each
Class 8.8 Steel
M6 × 1 mm
12	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	000000
16	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
20	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
25	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M8 × 1.25 mm
16	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
20	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
25	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
35	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
40	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M10 × 1.5 mm
20	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
25	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
35	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
40	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M12 × 1.75 mm
25	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
35	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
40	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
50	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M16 × 2 mm
50	Fully Threaded	24	10	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
Zinc-Plated Class 8.8 Steel
M6 × 1 mm
12	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
16	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
20	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
25	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	10	4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M8 × 1.25 mm
16	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
20	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
25	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
35	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
40	Fully Threaded	13	5.3	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M10 × 1.5 mm
20	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
25	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
35	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
40	Fully Threaded	17	6.4	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
M12 × 1.75 mm
25	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
30	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
35	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000
40	Fully Threaded	19	7.5	Coarse	110,000	ASME B18.2.3.1M, ISO 898-1	000000000	00000