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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.
Unit of Measure

Specifications

A - MAX

N/A 0.340

C - MIN

N/A 0.242

D

N/A 0.171-0.166

H - MAX

N/A 0.270

M

N/A 0.112-0.102

P - MAX

N/A 0.176

W

N/A 0.221-0.214

X

N/A 0.005

Axial Tensile Strength (LBS. MIN)

N/A 2300

Rec'm Seating Torque (IN-LBS)

N/A 30-40

Max. Locking Torque

N/A 11.000 lb·in

Approx. Weight (LBS/100)

N/A 0.200

Finish

N/A Passivate per AMS2700, Silver Plate per AMS 2410 plus Cetyl Alcohol Lubricant

Packaging

N/A Bulk

Thread Type

N/A Unified

Configuration 1

N/A 6 Point

Configuration 2

N/A Captive Washer

Simplified Material

N/A CRES

Strength

N/A 125KSI - 900Mpa

Temperature

N/A 450°F - 235°C

Thread

N/A 0.1640-32 UNJC-3B