THREAD: AS8879
MATERIAL:

• Nut - A286 corrosion resistant steel per AMS 5732 or AMS 5737 (UNS S66286).
• Washer - 300 series corrosion resistant steel per AMS-QQ-S-763.

HEAT TREAT:

• Nut -Rc 33-44
• Washer - None required.

FINISH:

• Nut

KFN512C(*) - Passivate per AMS2700, cadmium plate per AMS-QQ-P-416, Type II, Class 2, plus cetyl alcohol lubricant.
KFN512DL(*) - Passivate per AMS2700 and Kaylube molybdenum disulfide dry lubricant coat per AS5272.
KFN512E(*) - Passivate per AMS2700, silver plate per AMS2410, plus cetyl alcohol lubricant.
KFN512J(*) - Silver plate per AMS2410.
KFN512K(*) - Lubeco 905 solid film lubricant.
KFN512V(*) - Lubeco 2123 film lubricant.
• Washer - Passivate per AMS2700.

PERFORMANCE: KFS 1011, except as follows:

• Axial tensile strength as tabulated.
• Recommended seating torque as tabulated.
• Maximum locking torque as tabulated.
• Metallurgical examination (microstructure) required per 33A056.

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 supplied nuts for use with K-Fast® automatic tools. (Example: KFN512C3S).
NOTES: "C" and "W" dimensions apply prior to forming self-locking feature.