THREAD: AS8879
MATERIAL:

• Nut - A286 corrosion resistant steel per AMS5731, AMS5732 (UNS S66286) or AMS5737.
• Washer - 300 Series corrosion resistant steel per AMS-QQ-S-763.

HEAT TREAT: Nut - Rc 46 max.
FINISH:

• Nut - Passivate per AMS2700 and Kaylube molybdenum disulfide dry lubricant coat per AS5272, Type I.
• Washer - Passivate per AMS2700.

PERFORMANCE: NASM25027, except as follows:

• Axial tensile strength as tabulated.
• 5 seated cycles when tested on 6AL-4V titanium bolts per AMS 4928 or AMS 4967 with a heat treat of 160 KSI to 180 KSI.

APPLICATION: For use on standard to .016 oversize shank bolts.
PACKAGING: Parts are normally supplied in bulk packaging. Add "S" after dash number for spindle packaged nuts for use with K-Fast automatic tools. Example: KFN645-4S.
NOTES: "C" and "W" dimensions apply before forming self-locking feature.