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NSN 5305-01-342-8581

High Torque Screw

About this product

Between 1.035 inches and 1.065 inches fastener length, flat countersunk head style, between 0.3898 inches and 0.3908 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number 7S39-4-10 for national stock number 5305013428581.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-342-8581.

  • MPN or Model

    7S39-4-10

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.425 inches
  • Fastener Length
    Between 1.035 inches and 1.065 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.3898 inches and 0.3908 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches first hole and 0.086 inches first hole
  • Internal Drive Style
    Cross recess type 1
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.615 inches and 0.635 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.872 inches first hole
  • Material
    Steel comp 4130
  • Material Specification
    Mil-s-6758 military specification single material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 ty2 cl3 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 5305013428581

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
7S39-4-10 Boeing Company, The
7539-4-10 Boeing Company, The
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