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NSN 5305-01-374-5944

High Torque Screw

About this product

Between 0.838 inches and 0.865 inches fastener length, flat countersunk undercut head style, between 0.276 inches and 0.286 inches head diameter, head height: between 0.0785 inches and 0.0805 inches .

Manufacturer part number HT271A3-7M for national stock number 5305013745944.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-374-5944.

  • MPN or Model

    HT271A3-7M

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • 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
    0.406 inches
  • Fastener Length
    Between 0.838 inches and 0.865 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.276 inches and 0.286 inches
  • Head Height
    Between 0.0785 inches and 0.0805 inches
  • Grip Diameter
    Between 0.1890 inches and 0.1895 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.428 inches and 0.448 inches
  • Features Provided
    Dry film lubricant and o ring
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    100.0 degrees
  • Surface Finish
    32.0 microinches bearing surface of head32.0 microinches threads
  • Material
    Titanium alloy uns r56400 or titanium alloy uns r56440
  • 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 5305013745944

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HT271A3-7M Hi-shear Corporation
HT271A3-7M Lisi Aerospace Canada Corp
ST3M430V3-7ASM Boeing Company, The
ST3M430V3-7ASM Huck International, Inc.
ST3M430V3-7ASM Sps Technologies, Llc
ST3M430V3-7ASM Alcoa Global Fasteners, Inc.
ST3M430V3-7ASM Sps Technologies Ltd Tj Brooks
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