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NSN 5306-01-037-8903

Close Tolerance Hex Head Bolt

About this product

Between 2.313 inches and 2.360 inches fastener length, double hexagon head style, between 0.200 inches and 0.220 inches head height, width between flats: between 0.553 inches and 0.564 inches .

Manufacturer part number ST3M729-6D31 for national stock number 5306010378903.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-037-8903.

  • MPN or Model

    ST3M729-6D31

  • 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
    Between 0.365 inches and 0.432 inches
  • Fastener Length
    Between 2.313 inches and 2.360 inches
  • Head Style
    Double hexagon
  • Head Height
    Between 0.200 inches and 0.220 inches
  • Width Between Flats
    Between 0.553 inches and 0.564 inches
  • Grip Diameter
    Between 0.3740 inches and 0.3745 inches
  • Shank Unthreaded Hole Diameter
    0.106 inches first hole and 0.111 inches first hole
  • Thread Diameter
    0.375 inches
  • Grip Length
    Between 1.928 inches and 1.948 inches
  • Thready Qty Per Inch (tpi)
    24
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    2.185 inches first hole and 2.252 inches first hole
  • Material
    Steel
  • Material Specification
    23-112, mcdonnel douglas corporation mfr ref single material response
  • Thread Series Designator
    Unjf
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Close Tolerance Bolt

An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

Mechanic Bill explains Close Tolerance Hex Head Bolt

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NSN 5306010378903

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M729-6D31 Huck International, Inc.
ST3M729-6D31 Sps Technologies, Llc
ST3M729-6D31 Arconic Global Fasteners & Rings,
ST3M729-6D31 Heartland Precision Fasteners, Inc.
ST3M729-6D31 Fastener Innovation Technology, Inc.
ST3M729-6D31 Valley-todeco, Inc.
ST3M729-6D31 Sps Technologies, Llc
ST3M729-6D31 Hi-shear Corporation
ST3M729-6D31 Lisi Aerospace Canada Corp
MB145-6D31 Hi-shear Corporation
MB145-6D31 Lisi Aerospace Canada Corp
ST3M729-6D31 Boeing Company, The
ST3M729-6D31 Huck Intl Inc
ST3M729-6D31 Sps Technologies, Llc
ST3M729-6D31 Alcoa Global Fasteners, Inc.
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