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NSN 5305-01-383-9076

High Torque Screw

About this product

Between 0.848 inches and 0.878 inches fastener length, flat countersunk head style, between 0.498 inches and 0.507 inches head diameter, grip diameter: between 0.2637 inches and 0.2641 inches .

Manufacturer part number NAS1974-8TX for national stock number 5305013839076.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-383-9076.

  • MPN or Model

    NAS1974-8TX

  • 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)
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.425 inches
  • Fastener Length
    Between 0.848 inches and 0.878 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.498 inches and 0.507 inches
  • Grip Diameter
    Between 0.2637 inches and 0.2641 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.490 inches and 0.510 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    6500 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp 4140
  • Material Specification
    Mil-s-5626 military specification single material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 ty2 federal specification single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas1974 professional/industrial association standard
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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 5305013839076

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1974-8TX National Aerospace Standards
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