Taper Thread Grease Fittings
Taper Thread Grease Fittings are used on cars, trucks and many types of industrial machinery. It is recommended that SAE-LT taper threads (Society of Automotive Engineers Lubrication Threads) be installed into straight holes with a 1/4”-28 UNF-3B straight-threaded hole. The included angle of the thread for a 1/4″-28 taper thread grease zerk is 60º. Taper thread grease fittings include a dirt-excluding ball check. Taper thread grease fittings are also referred to as taper thread zerk fittings, taper thread grease zerks, or a taper thread zerk.
Several sizes available in both Stainless Steel and Monel.

| SAE Number | Thread | Figure | A (in) | B (in) | X (in) | Alemite # | Lincoln # | |
|---|---|---|---|---|---|---|---|---|
| H-100 | 1/4"-28 Taper (SAE-LT) | 1 | 35/64 | 3/16 | 5/16 | 1641-B | 5010 | View Product > |
| H-100-RLA | 1/4"-28 Taper (SAE-LT) | 4 | 11/16 | 23/64 | 5/16 | 1652-B | 5013 | View Product > |
| H-100-LMA | 1/4"-28 Taper (SAE-LT) | 4 | 31/32 | 5/8 | 5/16 | 1680-B | 5014 | View Product > |
| H-100-LA | 1/4"-28 Taper (SAE-LT) | 4 | 1-1/8 | 25/32 | 5/16 | 1698-B | 5017 | View Product > |
| H-100-LLA | 1/4"-28 Taper (SAE-LT) | 4 | 1-5/8 | 1 | 5/16 | 3014-B | - | View Product > |
| H-145 | 1/4"-28 Taper (SAE-LT) | 2 | 27/32 | 7/32 | 3/8 | 1637-B1 | 5210 | View Product > |
| H-165 | 1/4"-28 Taper (SAE-LT) | 2 | 3/4 | 7/32 | 3/8 | - | 5311 | View Product > |
| H-165-RL | 1/4"-28 Taper (SAE-LT) | 2 | 13/16 | 19/64 | 3/8 | 3010-B1 | 700396 | View Product > |
| H-190-A | 1/4"-28 Taper (SAE-LT) | 3 | 3/4 | 7/32 | 3/8 | 1911-B1 | 5410 | View Product > |

