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NSN 5305-01-298-7765

High Torque Screw

About this product

Between 0.954 inches and 0.984 inches fastener length, oval countersunk head style, between 0.3898 inches and 0.3948 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number 3M939-4-8F for national stock number 5305012987765.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-298-7765.

  • MPN or Model

    3M939-4-8F

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • NMF (National Motor Freight)
    139820 - Nickel Bolts/nails/nuts/rivets Etc
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.444 inches and 0.494 inches
  • Fastener Length
    Between 0.954 inches and 0.984 inches
  • Head Style
    Oval countersunk
  • Head Diameter
    Between 0.3898 inches and 0.3948 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.490 inches and 0.510 inches
  • Features Provided
    Cetyl alcohol lubricant
  • 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
  • Material
    Nickel alloy 718
  • Surface Treatment
    Aluminum
  • Thread Series Designator
    Unjf
More from these suppliers
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 5305012987765

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
3M939-4-8F Boeing Company, The
3M939-4-8F Sps Technologies, Llc
AIC939-4-8P Sps Technologies, Llc
HR248-4-8BJ Hi-shear Corporation
3M939-4-8F Heartland Precision Fasteners, Inc.
SC5087-4-8P Arconic Global Fasteners & Rings,
3M939-4-8F B & B Specialties Inc.
3M939-4-8F Houston Precision Fasteners I, Lp
3M939-4-8F Sps Technologies, Llc
3M939-4-8F Fastener Innovation Technology, Inc.
3M939-4-8F West Coast Aerospace Inc
HR248-4-8BJ Lisi Aerospace Canada Corp
VT1731-4-8P Alcoa Global Fasteners, Inc.
3M939-4-8F Abounding Security Inc
SC1823-4-8P Arconic Global Fasteners & Rings,
GS1018-4-8P B & B Specialties Inc.
Stock Check
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