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THREAD: AS8879
MATERIAL: 17-4PH stainless steel per AMS 5643 (UNS S17400).
HEAT TREAT: Aged to H-1025 condition per AMS-H-6875.
FINISH:
  • KFN517C(*) - Cadmium plate per AMS-QQ-P-416, Type II, Class 2, and cetyl alcohol lubricant.
  • KFN517DL(*) - Passivate per AMS2700 and Kaylube molybdenum disulfide dry lubricant coat per AS5272, Type I.
  • KFN517E(*) - Silver plate per AMS 2410, dye blue color, and cetyl alcohol lubricant. Blue dye to cover 20% of nut min. and is not to affect self-locking torque.
  • KFN517P(*) - Cadmium plate per AMS-QQ-P-416, Type I, Class 2, and cetyl alcohol lubricant.
PERFORMANCE: KFS1011, except axial tensile strength as tabulated.
APPLICATION: For use on standard to .032 oversize shank bolts.
PACKAGING: Parts are normally supplied in bulk packaging. Add "S" after dash number for spindle packaged nuts for use with standard K-Fast® tools or "SS" for parts packaged on "short spindles" for use on lightweight K-Fast® automatic tools. Spindle packaged parts apply to sizes -08 thru -5 only. (Example: KFN517C3S or KFN517C3SS).
NOTES: KFN517C(*), DL(*) and P(*) Parts to be identified with yellow dykem color. Coat 20% of nuts minimum. Coating not to affect self-locking torque.
Unit of Measure

Specifications

A - MAX

 N/A 0.425

B - MIN

 N/A 0.398

C - MIN

 N/A 0.348

D

 N/A 0.288-0.284

H - MAX

 N/A 0.340

M

 N/A 0.117-0.107

S - MIN

 N/A 0.090

W

 N/A 0.313-0.305

Y

 N/A 0.005

Axial Tensile Strength (LBS. MIN)

 N/A 7500

Approx. Weight (LBS/100)

 N/A 0.503

Finish

 N/A Silver Plate per AMS 2410, Dye Blue Color plus Cetyl Alcohol Lubricant. Blue dye to cover 20 % of nut min. and is not to affect self-locking torque.

Packaging

 N/A Spindle

Thread Type

 N/A Unified

Configuration 1

 N/A 6 Point

Simplified Material

 N/A CRES

Strength

 N/A 180KSI - 1250Mpa

Temperature

 N/A 450°F - 235°C

Thread

 N/A 0.2500-28 UNJF-3B