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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Grease Fitting Threads
More
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. 400 nickel fittings are the most corrosion resistant and can be used in caustic environments, such as those involving salt water, sulfuric acid, and alkalies.
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. UNF and UNEF 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.
Pkg. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Specifications Met | Pkg. Qty. | 1-9 | 10-Up | |
5/16"-32 UNEF Threads | |||||||||||
| Zinc-Plated Steel | 51/64" | 7/32" | 7/32" | 3/8" | 10,000 | Ball | __ | 10 | 0000000 | 000000 | 000000 |
1/4"-28 SAE-LT Threads | |||||||||||
| Zinc-Plated Steel | 49/64" | 13/64" | 13/64" | 3/8" | 8,000 | Ball | __ | 10 | 0000000 | 0000 | 0000 |
| Zinc-Plated Steel | 25/32" | 19/64" | 19/64" | 3/8" | 10,000 | Ball | __ | 10 | 0000000 | 0000 | 0000 |
1/8 BSPT Threads | |||||||||||
| Zinc-Plated Steel | 21mm | 5.6mm | 5.6mm | 11mm | 8,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
1/4 BSPT Threads | |||||||||||
| Zinc-Plated Steel | 25mm | 8.6mm | 8.6mm | 14mm | 8,000 | Ball | DIN 71412 | 10 | 0000000 | 00000 | 00000 |
1/8 PTF-SAE Threads | |||||||||||
| Zinc-Plated Steel | 27/32" | 19/64" | 19/64" | 7/16" | 8,000 | Ball | __ | 10 | 0000000 | 00000 | 0000 |
| Zinc-Plated Steel | 29/32" | 9/32" | 9/32" | 7/16" | 10,000 | Ball | __ | 10 | 0000000 | 00000 | 00000 |
| Zinc-Plated Steel | 1 7/32" | 3/16" | 9/16" | 7/16" | 10,000 | Ball | __ | 5 | 0000000 | 00000 | 00000 |
| Zinc-Plated Steel | 2 3/4" | 3/16" | 2 1/4" | 3/8" | 10,000 | Ball | __ | 3 | 0000000 | 00000 | 00000 |
| 400 Nickel | 61/64" | 11/32" | 11/32" | 7/16" | 10,000 | Ball | __ | 1 | 0000000 | 00000 | 00000 |
1/4 PTF-SAE Threads | |||||||||||
| Zinc-Plated Steel | 31/32" | 11/32" | 11/32" | 9/16" | 10,000 | Ball | __ | 5 | 0000000 | 0000 | 0000 |
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.
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 | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/8 PTF-SAE Threads | |||||||||||
| 0.373-0.38" | Zinc-Plated Steel | 3/4" | 13/64" | 13/64" | 7/16" | 10,000 | Ball | 10 | 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.
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. 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 | Pkg. Qty. | Pkg. | |
Adapters | |||||
| SAE-LT 1/4"-28 | UNF 1/4"-28 | Zinc-Plated Steel | 5 | 0000000 | 00000 |