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NSN 5305-01-612-8399

High Torque Screw

About this product

1.250 inches fastener length, pan head style, between 0.429 inches and 0.438 inches head diameter, head height: between 0.162 inches and 0.183 inches .

Manufacturer part number NAS1125-14 for national stock number 5305016128399.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-612-8399.

  • MPN or Model

    NAS1125-14

  • 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
    0.375 inches
  • Fastener Length
    1.250 inches
  • Head Style
    Pan
  • Head Diameter
    Between 0.429 inches and 0.438 inches
  • Head Height
    Between 0.162 inches and 0.183 inches
  • Grip Diameter
    Between 0.311 inches and 0.312 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • End Application
    C5m fuselage
  • Thread Diameter
    0.312 inches
  • Grip Length
    Between 0.865 inches and 0.885 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Material
    Steel comp 4140 or steel comp e4340 or steel comp 8740
  • Surface Treatment
    Cadmium and chromate
  • 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 5305016128399

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1125-14 National Aerospace Standards
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