Round Extended Washer Self Locking Nut

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  • Part Name
    ROUND EXTENDED WASHER SELF-LOCKING NUT
  • Federal Supply Class
    Nuts And Washers
  • NIIN
    014934427
  • Part Number
    KFN631-5, KFN631-5, KFN631-5
  • National Stock Number
    5310-01-493-4427
  • Item Name Code
    36744
Specifications
  • THREAD SERIES
    UNJF
  • NOMINAL THREAD SIZE
    0.3125 INCHES
  • THREAD QUANTITY PER INCH
    24
  • THREAD CLASS
    3B
  • THREAD DIRECTION
    RIGHT-HAND
  • MATERIAL
    PLASTIC POLYTETRAFLUOROETHYLENE LOCKING INSERT
  • ALUMINUM ALLOY NUT
  • MATERIAL DOCUMENT AND CLASSIFICATION
    MIL-P-19468 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT
  • SURFACE TREATMENT
    ANODIZE NUT
  • SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
    MIL-A-8625,TYPE II,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE NUT
  • NUT STYLE
    SPLINE DRIVE
  • WASHER OUTSIDE DIAMETER
    0.636 INCHES MAXIMUM
  • OVERALL HEIGHT
    0.470 INCHES MAXIMUM
  • WASHER THICKNESS
    0.117 INCHES MINIMUM AND
  • 0.127 INCHES MAXIMUM
  • DRIVE POINT QUANTITY
    8
  • LOCKING FEATURE
    PREVAILING TORQUE WITH NONMETALLIC INSERT
  • TEMP RATING
    250.0 DEG FAHRENHEIT NOMINAL
  • SPECIAL FEATURES
    NUT MATERIAL 7075-T73 ALUMINUM ALLOY:FIRST END FORMED OUT OF ROUND TO PROVIDE SELF-LOCKING ACTION
  • III END ITEM IDENTIFICATION
    A-10 THUNDERBOLT
Restrictions
  • Demilitarization Code
    A

    Items subject to the Export Administration Regulations (EAR) in parts 773-74 of Title 15, Code of Federal Regulations (CFR) (CCLI or EAR99) and determined by the DoD to present a low risk when released out of DoD control. No DEMIL, MUT or end use certificate is required. May require an export license from DOC.

  • Criticality Code
    X

    Does not have a nuclear hardened feature or other critical feature such as tolerance, fit restriction or application.

  • Hazardous Material Code
    N

    There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

  • Precious Metals Code (PMIC)
    A

    Item does not contain Precious Metal.

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