Grease Fittings
Thread these fittings into motors, bearings, engine blocks, and other machinery to create a lubrication point. They’re also known as hydraulic grease fittings.
Zinc-plated steel fittings have mild corrosion resistance. Brass fittings resist corrosion better than zinc-plated steel fittings. 303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical resistance. 316 stainless steel fittings resist corrosion and chemicals better than 303 stainless steel fittings and can be used in saltwater environments.
Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads. SAE-LT threads are tapered but designed to be installed into a 1/4"-28 straight-thread UNF hole. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage.
For technical drawings and 3-D models, click on a part number.
Pkg. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Specifications Met | Pkg. Qty. | 1-9 | 10-Up | |
3/8 NPT Threads | |||||||||||
| Zinc-Plated Steel | 1" | 9/32" | 9/32" | 43/64" | 10,000 | Ball | __ | 3 | 0000000 | 000000 | 000000 |
1/4"-28 UNF Threads | |||||||||||
| Zinc-Plated Steel | 39/64" | 7/64" | 1/8" | 3/8" | 10,000 | Ball | __ | 10 | 0000000 | 00000 | 0000 |
| Brass | 59/64" | 7/32" | 7/32" | 11/32" | 10,000 | Ball | __ | 1 | 000000 | 0000 | 0000 |
5/16"-24 UNF Threads | |||||||||||
| Zinc-Plated Steel | 59/64" | 7/32" | 7/32" | 11/32" | 1,450 | Ball | __ | 10 | 00000000 | 0000 | 0000 |
| Brass | 59/64" | 7/32" | 7/32" | 11/32" | 10,000 | Ball | __ | 3 | 0000000 | 00000 | 0000 |
303 Stainless Steel | 59/64" | 7/32" | 7/32" | 11/32" | 10,000 | Ball | __ | 1 | 0000000 | 00000 | 0000 |
3/8"-24 UNF Threads | |||||||||||
| Zinc-Plated Steel | 63/64" | 7/32" | 7/32" | 7/16" | 1,450 | Ball | __ | 10 | 00000000 | 00000 | 0000 |
1/2"-20 UNF Threads | |||||||||||
| Zinc-Plated Steel | 57/64" | 1/4" | 1/4" | 9/16" | 1,450 | Ball | __ | 5 | 00000000 | 00000 | 00000 |
1/4"-28 SAE-LT Threads | |||||||||||
| Zinc-Plated Steel | 13/16" | 5/32" | 13/64" | 3/8" | 10,000 | Ball | __ | 10 | 0000000 | 0000 | 0000 |
| Zinc-Plated Steel | 63/64" | 5/16" | 5/16" | 3/8" | 8,000 | Ball | __ | 10 | 0000000 | 00000 | 00000 |
| 303 Stainless Steel | 13/16" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | __ | 3 | 0000000 | 00000 | 00000 |
1/8 BSPT Threads | |||||||||||
| Zinc-Plated Steel | 25mm | 5.5mm | 5.5mm | 11mm | 10,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 0000 |
| 303 Stainless Steel | 23mm | 5.5mm | 5.5mm | 11mm | 8,000 | Ball | __ | 1 | 0000000 | 0000 | 0000 |
1/4 BSPT Threads | |||||||||||
| Zinc-Plated Steel | 23mm | 6.5mm | 6.5mm | 14mm | 10,000 | Ball | DIN 71412 | 5 | 0000000 | 00000 | 00000 |
3/8 BSPT Threads | |||||||||||
| Zinc-Plated Steel | 25.5mm | 7mm | 7mm | 17mm | 1,450 | Ball | DIN 71412 | 5 | 00000000 | 00000 | 00000 |
M5 × 0.8 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 24mm | 5.5mm | 5.5mm | 9mm | 10,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
M6 × 0.75 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 24mm | 5.5mm | 5.5mm | 9mm | 10,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
M6 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 23mm | 5.5mm | 5.5mm | 9mm | 8,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
| Brass | 24mm | 5.5mm | 5.5mm | 9mm | 10,000 | Ball | DIN 71412 | 5 | 0000000 | 00000 | 00000 |
| 303 Stainless Steel | 23mm | 5.6mm | 5.6mm | 9mm | 8,000 | Ball | __ | 3 | 0000000 | 00000 | 00000 |
| 316 Stainless Steel | 23.5mm | 5.5mm | 5.5mm | 9mm | 1,450 | Ball | DIN 71412 | 1 | 0000000 | 00000 | 00000 |
M7 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 23.5mm | 5.5mm | 5.5mm | 9mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 0000 | 0000 |
M8 × 0.75 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 23.5mm | 5.5mm | 5.5mm | 9mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 0000 | 0000 |
M8 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 23mm | 5.5mm | 5.5mm | 9mm | 8,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
| Brass | 24mm | 5.5mm | 5.5mm | 9mm | 10,000 | Ball | DIN 71412 | 5 | 0000000 | 00000 | 00000 |
| 303 Stainless Steel | 22mm | 5.6mm | 5.6mm | 9mm | 8,000 | Ball | __ | 3 | 0000000 | 00000 | 00000 |
M8 × 1.25 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 23mm | 5.6mm | 5.6mm | 9mm | 8,000 | Ball | __ | 10 | 0000000 | 00000 | 00000 |
| Brass | 24mm | 5.5mm | 5.5mm | 9mm | 10,000 | Ball | DIN 71412 | 1 | 0000000 | 0000 | 0000 |
| 303 Stainless Steel | 22mm | 5.5mm | 5.5mm | 9mm | 8,000 | Ball | __ | 1 | 0000000 | 0000 | 0000 |
M10 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 24mm | 5.6mm | 5.6mm | 11mm | 8,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
| Brass | 25mm | 5.5mm | 5.5mm | 11mm | 10,000 | Ball | DIN 71412 | 3 | 0000000 | 00000 | 00000 |
| 303 Stainless Steel | 23mm | 5.6mm | 5.6mm | 11mm | 8,000 | Ball | __ | 1 | 0000000 | 0000 | 0000 |
M10 × 1.25 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 25mm | 5.5mm | 5.5mm | 11mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 0000 | 0000 |
M10 × 1.5 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 26mm | 6.9mm | 6.9mm | 11mm | 8,000 | Ball | __ | 10 | 0000000 | 00000 | 00000 |
| 303 Stainless Steel | 25mm | 5.5mm | 5.5mm | 11mm | 1,450 | Ball | DIN 71412 | 1 | 0000000 | 00000 | 00000 |
M12 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 22.5mm | 6.5mm | 6.5mm | 14mm | 1,450 | Ball | DIN 71412 | 5 | 00000000 | 00000 | 00000 |
M12 × 1.5 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 23mm | 6.5mm | 6.5mm | 14mm | 10,000 | Ball | DIN 71412 | 5 | 0000000 | 00000 | 0000 |
M12 × 1.75 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 22.5mm | 6.5mm | 6.5mm | 14mm | 1,450 | Ball | DIN 71412 | 5 | 00000000 | 00000 | 00000 |
M14 × 1.5 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 22.5mm | 6.5mm | 6.5mm | 14mm | 1,450 | Ball | DIN 71412 | 5 | 00000000 | 00000 | 00000 |
M16 × 1.5 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 25.5mm | 7mm | 7mm | 17mm | 1,450 | Ball | DIN 71412 | 5 | 00000000 | 00000 | 00000 |
1/8 PTF-SAE Threads | |||||||||||
| Zinc-Plated Steel | 57/64" | 1/4" | 19/64" | 7/16" | 10,000 | Ball | __ | 10 | 0000000 | 00000 | 00000 |
| Zinc-Plated Steel | 1 1/16" | 9/32" | 9/32" | 7/16" | 1,450 | Ball | __ | 10 | 00000000 | 0000 | 0000 |
| 303 Stainless Steel | 63/64" | 17/64" | 17/64" | 7/16" | 8,000 | Ball | __ | 1 | 0000000 | 0000 | 0000 |
1/4 PTF-SAE Threads | |||||||||||
| Zinc-Plated Steel | 57/64" | 1/4" | 1/4" | 9/16" | 1,450 | Ball | __ | 10 | 00000000 | 00000 | 00000 |
| Zinc-Plated Steel | 1 7/64" | 11/32" | 11/32" | 9/16" | 8,000 | Ball | __ | 10 | 0000000 | 00000 | 00000 |
| 303 Stainless Steel | 1 7/64" | 11/32" | 11/32" | 9/16" | 8,000 | Ball | __ | 1 | 0000000 | 00000 | 00000 |
Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Square Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/8 PTF-SAE Threads | ||||||||||
| Zinc-Plated Steel | 1 1/8" | 9/32" | 13/32" | 7/16" | 10,000 | Ball | 1 | 0000000 | 00000 | 00000 |
Pin-Style Grease Fittings
The pins on these fittings lock with dispensing tips for pin-style fittings to create a tight seal. Their brass bodies resist corrosion. They have a check valve that prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.They have PTF-SAE and NPTF (Dryseal) threads, which are compatible with NPT threads.
Zinc-plated steel fittings have mild corrosion resistance. Brass fitting is more corrosion resistant than zinc-plated steel fittings.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Body Material | Pin Material | Overall Ht. | Shank Lg. | Thread Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | 1-9 | 10-Up | |
1/8 NPTF Threads | ||||||||||
| Brass, Zinc-Plated Steel | Zinc-Plated Steel | 1 1/2" | 7/16" | 7/32" | 7/16" | 8,000 | Ball | 0000000 | 000000 | 00000 |
Grease Fittings for Unthreaded Holes
Drive these fittings into unthreaded holes with a hammer and grease fitting installation tool (not included). They're also known as hydraulic grease fittings.
Fittings with a serrated shank have a tighter grip than those with a smooth shank for a more secure fit in old or oversized holes.
Zinc-plated steel fittings have mild corrosion resistance.
Fittings with a check valve prevent grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
For technical drawings and 3-D models, click on a part number.
Pkg. | ||||||||
|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Shank Lg. | Hex Size | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
For 3/16" Hole Dia. | ||||||||
| Zinc-Plated Steel | 53/64" | 7/32" | 7/16" | Ball | 10 | 0000000 | 000000 | 000000 |
Self-Tapping Grease Fittings for Unthreaded Holes
To fit securely in unthreaded holes, these fittings cut threads as they’re installed. Use a hex wrench to install. Fittings can be driven in, but then are not pressure rated. They're zinc-plated steel for mild corrosion resistance. All have an integral check valve that prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants. These fittings are also known as hydraulic grease fittings.
PTF-SAE (Dryseal) threads are compatible with NPT threads. SAE-LT threads are tapered.
For technical drawings and 3-D models, click on a part number.
Pkg. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Hole Dia. | Material | Overall Ht. | Shank Lg. | Thread Lg. | Hex Size | Square Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/4"-28 SAE-LT Threads | ||||||||||||
| 0.23-0.235" | Zinc-Plated Steel | 13/16" | 13/64" | 13/64" | 3/8" | __ | 10,000 | Ball | 10 | 0000000 | 000000 | 00000 |
M6 × 1 mm Metric Threads | ||||||||||||
| 5.6-5.7mm | Zinc-Plated Steel | 20mm | 5.5mm | 5.5mm | __ | 9mm | 10,000 | Ball | 10 | 0000000 | 00000 | 00000 |
M8 × 1 mm Metric Threads | ||||||||||||
| 7.6-7.7mm | Zinc-Plated Steel | 20mm | 5.5mm | 5.5mm | __ | 9mm | 10,000 | Ball | 5 | 0000000 | 00000 | 0000 |
M10 × 1 mm Metric Threads | ||||||||||||
| 9.6-9.7mm | Zinc-Plated Steel | 20mm | 5.5mm | 5.5mm | __ | 11mm | 10,000 | Ball | 5 | 0000000 | 00000 | 00000 |
1/8 PTF-SAE Threads | ||||||||||||
| 0.373-0.38" | Zinc-Plated Steel | 55/64" | 5/16" | 1/4" | 7/16" | __ | 8,000 | Ball | 10 | 0000000 | 00000 | 00000 |
Grease Fitting Adapters
When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.
Zinc-plated steel adapters have mild corrosion resistance. Brass adapters resist corrosion better than zinc-plated steel adapters. 303 stainless steel adapters are more corrosion resistant than brass adapters and have good chemical resistance.
PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage. SAE-LT threads are tapered but designed to be installed into a 1/4"-28 straight-thread UNF hole.
For technical drawings and 3-D models, click on a part number.
Connection | ||||
|---|---|---|---|---|
| Male | Female | Material | Each | |
Adapters | ||||
| NPTF 1/8 | NPTF 1/8 | 303 Stainless Steel | 0000000 | 000000 |
| UNF 1/4"-28 | NPT 1/8 | Steel | 0000000 | 00000 |
| SAE-LT 1/4"-28 | NPTF 1/8 | Zinc-Plated Steel | 0000000 | 0000 |
| SAE-LT 1/4"-28 | NPTF 1/8 | 303 Stainless Steel | 0000000 | 00000 |
| NPT 1/4 | NPT 1/4 | Steel | 00000000 | 00000 |
| NPT 1/8 | NPT 1/8 | Brass | 00000000 | 00000 |
| NPT 1/8 | NPT 1/8 | Steel | 00000000 | 00000 |
| PTF-SAE 1/8 | PTF-SAE 1/8 | Zinc-Plated Steel | 0000000 | 00000 |