Grease fittings are used in mechanical systems to add grease with a grease gun.
The fitting is permanently installed by a threaded connection leaving a nipple connection the grease gun attaches to.
By using the pressure in the grease gun, grease is added to the system through the grease fitting.
1/4 - 28 Taper Thread
Insert Length (A) = 0.20"
Overall Length (B) = 0.75"
Hex Size: 0.37"
ZINC-Plated Steel. ALL FITTINGS MEET SAE J-534C SPECIFICATIONS. 
