THREAD: AS8879
MATERIAL:
  • Nut - Alloy steel per AMS6322 (8740), or AMS-S-5000 (4340).
  • Seal - Teflon per ASTM-D-1710.
HEAT TREAT:
  • Nut - Rc 39-43 per AMS-H-6875.
  • Seal - None
FINISH:
  • Nut - Cadmium plated per AMS-QQ-P-416, Type II, Class 3, and cetyl alcohol lubricant.
  • Seal - None
  • PERFORMANCE: KFS1009, except locking torque requirement limited to one seated cycle, and axial tensile strength as tabulated.
    NOTES:
    1. Nut design incorporates positive retention of sealing ring.
    2. Packaging: Add "S" after dash number for spindle packaged nuts for use with K-Fast automatic tools. Example: KFN556-3S.
    3. "C" and "W" dimensions apply before forming self-locking feature.
    Unit of Measure

    Specifications

    A - MAX

    N/A 0.461

    B

    N/A 0.275-0.270

    C - MIN

    N/A 0.347

    D

    N/A 0.268-0.254

    H - MAX

    N/A 0.335

    M

    N/A 0.111-0.107

    Q

    N/A 0.045-0.025

    W

    N/A 0.313-0.306

    Axial Tensile Strength (LBS. MIN)

    N/A 6200

    Installation Torque (IN-LBS)

    N/A 100-110

    Approx. Weight (LBS/100)

    N/A 0.460

    Packaging

    N/A Bulk

    Thread Type

    N/A Unified

    Configuration 1

    N/A 6 Point

    Configuration 2

    N/A Self-Sealing

    Simplified Material

    N/A Alloy Steel

    Strength

    N/A 160KSI - 1100Mpa

    Temperature

    N/A 160°F - 70°C

    Thread

    N/A 0.2500-28 UNJF-3B