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THREAD: AS8879
MATERIAL:
  • Nut - 304 corrosion resistant steel per AMS 5697A or AMS5639 (UNS S30400), or corrosion resistant steel per AMS 5686 (UNS S3500).
  • Washer - 17-4PH stainless steel per AMS 5643 (UNS S17400).
HEAT TREAT: Washer - H-900 condition.
FINISH:
  • Nut

    • KFN522C(*) - Cadmium plate per AMS-QQ-P-416, Type II, Class 2, and cetyl alcohol lubricant.
    KFN522DL(*) - Kaylube molybdenum disulfide dry lubricant coat per AS5272.
    KFN522E(*) - Silver plate per AMS 2410 and cetyl alcohol lubricant.
    KFN522K(*) - Lubeco 905 solid film lubricant.
  • Washer

    • KFN522-(*) - Kaylube molybdenum disulfide dry lubricant coat per AS5272.
    KFN522-(*)E - Silver plate per AMS 2410 and cetyl alcohol lubricant.
    KFN522-(*)H - Cadmium plate per AMS-QQ-P-416, Type II, Class 2.
    KFN522-(*)NF - Passivate per AMS2700.
    KFN522-(*)Z - Alumazite "Z" per NAS4006.
PERFORMANCE: KFS 1011, except as follows:
  • Locking torque limited to 5 unseated cycles.
  • Axial tensile strength as tabulated when tested on 180 KSI min. bolts.
APPLICATIONS: For use on standard to .032 oversize shank bolts.
MISALIGNMENT: Up to 7° maximum from centered position.
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: KFN522DL4S).
Unit of Measure

Specifications

A - MIN

 N/A 0.850

C - MIN

 N/A 0.631

D

 N/A 0.538-0.534

H - MAX

 N/A 0.525

L

 N/A 0.915-0.905

M

 N/A 0.152-0.132

P - REF

 N/A 0.654

R - REF

 N/A 0.500

V

 N/A 0.235-0.225

W

 N/A 0.564-0.553

X - REF

 N/A 0.640

Axial Tensile Strength (LBS. MIN)

 N/A 25500

Rec'm Seating Torque (LBF-IN)

 N/A 410-470

Approx. Weight (LBS/100)

 N/A 4.390

Nut Finish

 N/A Kaylube Molybdenum Disulfide Dry Lubricant Coat per AS5272

Washer Finish

 N/A Cadmium Plate per AMS-QQ-P-416, Type II, Class 2

Packaging

 N/A Spindle

Thread

 N/A 0.5000-20 UNJF-3B