SBAC TS 2 Issue 5 (2004)
SBAC TS 2 Issue 5 (2004) Performance Specification For All Metal Self Locking Nuts (unified Threads), Strength: 125,000 Lbf/in[2] (56 Tonf/in[2]) 250 Degrees C Max. Gives the requirements for self-locking nuts which will develop a minimum tensile strength of 125,000 lbf/in[2] (56 tonf/in[2]) and therefore suitable for use with 55/65 ton bolts.