Grease Fitting Technical Information

Fitting Selection To select the correct grease fittings for your requirements, consider
that the tip of the fittings should point to a clear space for free
operation of the grease gun and the hole diameter. Seal must be maintained
up to 10 degrees maximum deviation angle between the end of the grease
gun and the grease fitting.
Materials Body: SAE 12L14 Steel
Spring: Music wire
Ball: Steel
Hardness Grease fittings are case hardened at minimum Rockwell 83, on the 15N
(450 Vickers) with a depth of 0.005″ to 0.009″.
Plating Plating is Zinc yellow or clear dip chromate. Yellow chromate gives the
parts a bright golden color and clear chromate gives the parts a silver
color. Minimum thickness of plating is 0.0002″. This plating gives
an excellent corrosion resistance; Grease fittings resist salt spray test
(ASTM B 117) for a minimum of 75 hours before any rust or corrosion begins.
Threads Threads are rolled according to the SAE J-476. The following threads are
the most popular:
1. 1/8″-27 PTF Pipe Thread
2. 1/4″-28 SAE-LT Taper Thread
The first number indicates the thread diameter and the second number
indicates the number of threads per inch.