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NSN 5305-01-539-3977

High Torque Screw

About this product

Lubricant- cetyl alcohol.

Manufacturer part number 3M927-4L12 for national stock number 5305015393977.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-539-3977.

  • MPN or Model

    3M927-4L12

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • NMF (National Motor Freight)
    095190 - Hardware, NOI
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.469 inches
  • Fastener Length
    1.219 inches
  • Head Style
    Fillister countersunk
  • Head Diameter
    Between 0.389 inches and 0.394 inches
  • Head Height
    Between 0.070 inches and 0.074 inches
  • Grip Diameter
    Between 0.248 inches and 0.249 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    0.750 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    125000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Part Name Assigned By Controlling Agency
    Screw-close tolerance 100 degrees countersunk reduced head, hi-torque, non magnetic cres, ivd aluminum coated
  • Material
    Nickel alloy 718
  • Material Specification
    Ams 5662 national std/spec single material response
  • Surface Treatment
    Aluminum
  • Surface Treatment Specification
    Mil-dtl-83488 type 2 cls 3 national std/spec single treatment response
  • Thread Series Designator
    Unjf
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Close Tolerance Screw

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Mechanic Bill explains High Torque Screw

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NSN 5305015393977

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
3M927-4L12 Boeing Company, The
3M927-4L12 Arconic Global Fasteners & Rings,
3M927-4L12 Sps Technologies, Llc
3M927-4L12 Hi-shear Corporation
3M927-4L12 Sps Technologies, Llc
3M927-4L12 Twist Tite Mfg, Inc
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