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NSN 5305-00-458-1874

High Torque Screw

About this product

Between 0.761 inches and 0.791 inches fastener length, flat countersunk head style, between 0.270 inches and 0.302 inches head diameter, grip diameter: between 0.1885 inches and 0.1895 inches .

Manufacturer part number 7S37-3-8 for national stock number 5305004581874.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-458-1874.

  • MPN or Model

    7S37-3-8

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.251 inches and 0.301 inches
  • Fastener Length
    Between 0.761 inches and 0.791 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.270 inches and 0.302 inches
  • Grip Diameter
    Between 0.1885 inches and 0.1895 inches
  • Shank Unthreaded Hole Diameter
    0.070 inches first hole and 0.080 inches first hole
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.490 inches and 0.510 inches
  • Thready Qty Per Inch (tpi)
    32
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    100.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.632 inches first hole and 0.682 inches first hole
  • Material
    Steel comp 4130
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416, type 2, cl 3 federal specification single treatment response
  • Thread Series Designator
    Unf
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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 5305004581874

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
7S37-3-8 Boeing Company, The
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