About Grease Fitting Threads
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About Oil Fittings and Oil Cups
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Threaded Caps
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Protect externally threaded components from contaminants during fabrication and storage.
Plastic caps resist corrosion better than aluminum caps.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
---|---|---|---|---|---|---|---|---|
Size | Type | For OD | Inside Ht. | Max. Temp., °F | Color | Pkg. Qty. | Pkg. | |
Plastic | ||||||||
For Straight-Thread Pipe | ||||||||
5/8"-24 | UNEF | 5/8" | 13/32" | 150° | Red | 100 | 00000000 | 000000 |
3/4"-20 | UNEF | 3/4" | 1/2" | 150° | Red | 100 | 00000000 | 00000 |
7/8"-20 | UNEF | 7/8" | 23/32" | 150° | Red | 100 | 00000000 | 00000 |
1 1/8"-18 | UNEF | 1 1/8" | 15/32" | 150° | Red | 100 | 00000000 | 00000 |
1 1/4"-18 | UNEF | 1 1/4" | 15/32" | 150° | Red | 100 | 00000000 | 00000 |
1 3/8"-18 | UNEF | 1 3/8" | 15/32" | 150° | Red | 50 | 00000000 | 00000 |
Caps for Mil. Spec. Screw-Together Connectors
![](/prerenderstable/mvPRE/contents/gfx/imagecache/890/8903t85p1-d01b-digital@halfx_635888370070000000.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/890/8903t86p1-d01b-digital@halfx_635888370060000000.png?ver=imagenotfound)
Protect Mil. Spec. connectors when not in use.
For technical drawings and 3-D models, click on a part number.
Thread | |||||
---|---|---|---|---|---|
Size | Type | Material | Temp. Range, °F | Each | |
External Thread | |||||
5/8"-24 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 000000 |
7/8"-20 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
1"-20 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
1 1/8"-18 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
1 1/4"-18 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
Internal Thread | |||||
5/8"-24 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
7/8"-20 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
1"-20 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
1 1/8"-18 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
1 1/4"-18 | UNEF | Cadmium-Plated Aluminum | -65° to 255° | 0000000 | 00000 |
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.
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.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/109/1095k12p2-g02a-digital@halfx_637032255932652906.png?ver=imagenotfound)
Male
Threads
Pkg. | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
5/16"-32 UNEF Threads | ||||||||||
Zinc-Plated Steel | 21/32" | 9/64" | 15/64" | 3/8" | 10,000 | Ball | 10 | 0000000 | 00000 | 00000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/109/1095k25p2-g02a-digital@halfx_637032187457180837.png?ver=imagenotfound)
Pkg. | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Material | Overall Ht. | Thread Lg. | Shank Lg. | Hex Size | Max. Pressure, psi | Check Valve Type | Pkg. Qty. | 1-9 | 10-Up | |
5/16"-32 UNEF Threads | ||||||||||
Zinc-Plated Steel | 51/64" | 11/64" | 7/32" | 3/8" | 10,000 | Ball | 10 | 0000000 | 000000 | 000000 |
Oil Fittings
Zinc and zinc-plated steel fittings have mild corrosion resistance. Zinc-plated brass fittings have good corrosion resistance. Nickel-plated brass fittings are more corrosion resistant than zinc-plated brass fittings.
Fitting with a check valve prevents oil from leaking when pressure causes backward flow. The valve stays closed when not in use to keep out dirt and other contaminants. Fittings with a self-closing hinged cover block contaminants from entering equipment.
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.
Note: Fittings do not hold oil; any oil dispensed into the fittings passes into the part to be lubricated.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/121/1211k1c1-g02a-digital-master1567632949-p9@halfx_637032269320729415.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/121/1211k1l1-g02a-digital-master1567632877-p9@halfx_637032253194680056.png?ver=imagenotfound)
Each | |||||||
---|---|---|---|---|---|---|---|
Material | Overall Ht. | Shank Lg. | Thread Lg. | Installation Clearance | 1-9 | 10-Up | |
1/4"-32 Male UNEF Threads | |||||||
Zinc-Plated Brass | 7/16" | 7/32" | 7/32" | 3/8" | 000000 | 000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/122/1229k13c1-g02a-digital-master1567632878-p9@halfx_637032244279959082.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/ins/installation-clearance-straight-g02a-digital-master1567713725-p9@halfx_637032932442975348.png?ver=imagenotfound)
Each | |||||||
---|---|---|---|---|---|---|---|
Material | Overall Ht. | Shank Lg. | Thread Lg. | Installation Clearance | 1-9 | 10-Up | |
1/4"-32 Male UNEF Threads | |||||||
Zinc-Plated Steel | 9/16" | 5/32" | 5/32" | 11/16" | 0000000 | 000000 | 000000 |
Zinc-Plated Steel | 9/16" | 3/16" | 3/16" | 3/4" | 0000000 | 00000 | 00000 |
Zinc-Plated Steel | 3/4" | 1/4" | 1/4" | 3/4" | 0000000 | 00000 | 00000 |
5/16"-32 Male UNEF Threads | |||||||
Zinc-Plated Steel | 27/32" | 1/4" | 1/4" | 13/16" | 0000000 | 00000 | 00000 |