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NSN 5305-01-337-5977

High Torque Screw

About this product

Between 2.064 inches and 2.111 inches fastener length, flat countersunk undercut head style, between 0.966 inches and 1.014 inches head diameter, head height: between 0.157 inches and 0.160 inches .

Manufacturer part number HT357E8-21 for national stock number 5305013375977.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-337-5977.

  • MPN or Model

    HT357E8-21

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.768 inches
  • Fastener Length
    Between 2.064 inches and 2.111 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.966 inches and 1.014 inches
  • Head Height
    Between 0.157 inches and 0.160 inches
  • Grip Diameter
    Between 0.4990 inches and 0.4995 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.500 inches
  • Grip Length
    Between 1.302 inches and 1.322 inches
  • Features Provided
    O ring
  • Thready Qty Per Inch (tpi)
    20
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Surface Finish
    32.0 microinches bearing surface of head32.0 microinches grip32.0 microinches threads
  • Material
    Rubber butadiene-acrylonitrile class nbr ringnickel alloy 718 fastener
  • Material Specification
    Ams 5662 assn standard single material response fastener
  • Surface Treatment
    Passivate fastener
  • 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 5305013375977

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HT357E8-21 Hi-shear Corporation
HT357E8-21 Lisi Aerospace Canada Corp
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