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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 0.415

C - MIN

N/A 0.348

D

N/A 0.288-0.284

H - MAX

N/A 0.290

L

N/A 0.475-0.465

M

N/A 0.127-0.107

P - REF

N/A 0.339

R - REF

N/A 0.250

V

N/A 0.120-0.110

W

N/A 0.313-0.305

X - REF

N/A 0.340

Axial Tensile Strength (LBS. MIN)

N/A 5000

Rec'm Seating Torque (IN-LBS)

N/A 75-90

Approx. Weight (LBS/100)

N/A 0.590

Nut Finish

N/A Lubeco 905 Solid Film Lubricant

Washer Finish

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

Packaging

N/A Bulk

Thread Type

N/A Unified

Configuration 1

N/A 6 Point

Configuration 2

N/A Self-Aligning

Simplified Material

N/A CRES

Strength

N/A 125KSI - 900Mpa

Temperature

N/A 450°F - 235°C

Thread

N/A 0.2500-28 UNJF-3B