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NSN 5306-01-256-4461

Close Tolerance Hex Head Bolt

About this product

Between 1.484 inches and 1.531 inches fastener length, double hexagon head style, between 0.177 inches and 0.197 inches head height, width between flats: between 0.492 inches and 0.502 inches .

Manufacturer part number ST3M729-5D18 for national stock number 5306012564461.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-256-4461.

  • MPN or Model

    ST3M729-5D18

  • 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 0.349 inches and 0.416 inches
  • Fastener Length
    Between 1.484 inches and 1.531 inches
  • Head Style
    Double hexagon
  • Head Height
    Between 0.177 inches and 0.197 inches
  • Width Between Flats
    Between 0.492 inches and 0.502 inches
  • Grip Diameter
    Between 0.3115 inches and 0.3120 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches first hole and 0.081 inches first hole
  • Thread Diameter
    0.312 inches
  • Grip Length
    Between 1.115 inches and 1.135 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    125000 pounds per square inch
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    1.356 inches first hole and 1.423 inches first hole
  • Material
    Stainless steel
  • 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 5306012564461

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M729-5D18 Boeing Company, The
MB145-5D18 Hi-shear Corporation
ST3M729-5D18 Arconic Global Fasteners & Rings,
ST3M729-5D18 Heartland Precision Fasteners, Inc.
ST3M729-5D18 Huck International, Inc.
ST3M729-5D18 Fastener Innovation Technology, Inc.
MB145-5D18 Lisi Aerospace Canada Corp
ST3M729-5D18 Sps Technologies, Llc
ST3M729-5D18 Valley-todeco, Inc.
ST3M729-5D18 Sps Technologies, Llc
ST3M729-5D18 Alcoa Global Fasteners, Inc.
ST3M729-5D18 Huck Intl Inc
Stock Check
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