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 | Standard |
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About Grease Fitting Threads
More
Grease Fittings
These fittings are also known as hydraulic grease fittings.
Zinc-plated steel fittings have mild corrosion resistance. 303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical resistance. Monel 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.
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.
Male
Threads
Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Shank Lg. | Thread Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/4"-28 SAE-LT Threads | ||||||||||
| Zinc-Plated Steel | 35/64" | 3/16" | 3/16" | 5/16" | 10,000 | Ball | 10 | 0000000 | 00000 | 00000 |
| Zinc-Plated Steel | 11/16" | 23/64" | 13/64" | 5/16" | 10,000 | Ball | 10 | 0000000 | 0000 | 0000 |
| Zinc-Plated Steel | 31/32" | 5/8" | 13/64" | 5/16" | 10,000 | Ball | 10 | 0000000 | 0000 | 0000 |
| Zinc-Plated Steel | 1 1/8" | 25/32" | 13/64" | 5/16" | 10,000 | Ball | 10 | 0000000 | 00000 | 0000 |
| Zinc-Plated Steel | 1 5/8" | 1" | 13/64" | 5/16" | 10,000 | Ball | 5 | 0000000 | 0000 | 0000 |
| 303 Stainless Steel | 17/32" | 3/16" | 7/64" | 5/16" | 10,000 | Ball | 5 | 0000000 | 00000 | 0000 |
| 303 Stainless Steel | 19/32" | 7/32" | 7/32" | 9/32" | 10,000 | Ball | 3 | 0000000 | 0000 | 0000 |
| Monel | 17/32" | 3/16" | 3/16" | 5/16" | 10,000 | Ball | 1 | 0000000 | 0000 | 0000 |
Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/4"-28 SAE-LT Threads | ||||||||||
| Zinc-Plated Steel | 3/4" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | 10 | 0000000 | 00000 | 00000 |
| Zinc-Plated Steel | 51/64" | 5/16" | 5/16" | 3/8" | 8,000 | Ball | 10 | 0000000 | 0000 | 0000 |
| 303 Stainless Steel | 3/4" | 7/64" | 13/64" | 3/8" | 10,000 | Ball | 1 | 0000000 | 0000 | 0000 |
| Monel | 3/4" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | 1 | 0000000 | 00000 | 00000 |
Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/4"-28 SAE-LT Threads | ||||||||||
| Zinc-Plated Steel | 13/16" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | 10 | 0000000 | 00000 | 00000 |
| Zinc-Plated Steel | 63/64" | 5/16" | 5/16" | 3/8" | 8,000 | Ball | 10 | 0000000 | 0000 | 0000 |
| 303 Stainless Steel | 13/16" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | 3 | 0000000 | 00000 | 00000 |
Self-Tapping Grease Fittings for Unthreaded Holes
Ensure a secure fit in unthreaded holes—these fittings cut threads as they’re installed. Install with a hex wrench. 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.
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 | 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 | 3/4" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | 10 | 0000000 | 00000 | 00000 |
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 | |
1/4"-28 SAE-LT Threads | |||||||||||
| 0.23-0.235" | Zinc-Plated Steel | 13/16" | 13/64" | 13/64" | 3/8" | 10,000 | Ball | 10 | 0000000 | 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. 303 stainless steel adapters are more corrosion resistant than zinc-plated steel adapters and have good chemical resistance.
PTF 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.
For technical drawings and 3-D models, click on a part number.
