About Grease Fitting Threads
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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.
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. 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. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/4"-28 SAE-LT Threads  | ||||||||||
| 400 Nickel | 17/32" | 3/16" | 3/16" | 5/16" | 10,000 | Ball | 1 | 0000000 | 00000 | 00000 |
1/8 PTF-SAE Threads | ||||||||||
| 400 Nickel | 5/8" | 9/32" | 9/32" | 7/16" | 10,000 | Ball | 1 | 0000000 | 00000 | 00000 |
| 400 Nickel | 3/4" | 5/16" | 5/16" | 7/16" | 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 | |
1/8 PTF-SAE Threads | ||||||||||
| 400 Nickel | 61/64" | 11/32" | 11/32" | 7/16" | 10,000 | Ball | 1 | 0000000 | 000000 | 000000 |
Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
1/8 PTF-SAE Threads | ||||||||||
| 400 Nickel | 1 1/4" | 11/32" | 11/32" | 7/16" | 10,000 | Ball | 1 | 0000000 | 000000 | 000000 |
Button-Head Grease Fittings
Often used on earth movers, mining equipment, and other heavy machinery, these fittings have a T-shaped top that holds the dispensing tip in place so it won’t pop off when adding grease. They're best for machinery requiring high volumes of grease because they let more grease pass through than standard grease fittings, thanks to a larger opening. An integral check valve prevents grease from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants.
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.
PTF-SAE and NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
| Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Head Dia. | Max. Pressure, psi | Check Valve Type | Each | |
1/8 PTF-SAE Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 400 Nickel | 3/4" | 3/16" | 11/32" | 5/8" | 5/8" | 6,000 | Plunger | 0000000 | 000000 |