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NSN 5305-01-620-4137

High Torque Screw

About this product

2.079 inches fastener length, flat countersunk head style, between 0.752 inches and 0.762 inches head diameter, grip diameter: between 0.373 inches and 0.374 inches .

Manufacturer part number NAS1156-27 for national stock number 5305016204137.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-620-4137.

  • MPN or Model

    NAS1156-27

  • 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
    0.391 inches
  • Fastener Length
    2.079 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.752 inches and 0.762 inches
  • Grip Diameter
    Between 0.373 inches and 0.374 inches
  • Internal Drive Style
    D8 offset cruciform (torque set)
  • End Application
    Powerplant/en
  • Thread Diameter
    0.375 inches
  • Grip Length
    1.688 inches
  • Thready Qty Per Inch (tpi)
    24
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Part Name Assigned By Controlling Agency
    Screw close tolerance
  • Material
    Steel comp 4140 or steel comp 8740
  • Surface Treatment
    Cadmium
  • 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 5305016204137

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1156-27 National Aerospace Standards
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