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.
Zinc-plated steel fittings have mild corrosion resistance. 303 stainless steel fittings are more corrosion resistant than brass fittings and have good chemical 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.
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.
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"-24 UNF Threads | |||||||||||
| Zinc-Plated Steel | 63/64" | 7/32" | 7/32" | 7/16" | 1,450 | Ball | __ | 10 | 00000000 | 000000 | 000000 |
M6 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 20.5mm | 5.5mm | 5.5mm | 9mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 00000 | 00000 |
M8 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 20.5mm | 5.5mm | 5.5mm | 9mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 00000 | 00000 |
M8 × 1.25 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 20.5mm | 5.5mm | 5.5mm | 9mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 00000 | 00000 |
M10 × 1 mm Metric Threads | |||||||||||
| Zinc-Plated Steel | 25mm | 5.5mm | 5.5mm | 11mm | 1,450 | Ball | DIN 71412 | 10 | 00000000 | 00000 | 00000 |
1/8 PTF-SAE Threads | |||||||||||
303 Stainless Steel | 61/64" | 7/32" | 11/32" | 7/16" | 10,000 | Ball | __ | 1 | 0000000 | 0000 | 0000 |