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NSN 5306-00-061-7861

Close Tolerance Hex Head Bolt

About this product

Between 2.390 inches and 2.437 inches fastener length, hexagon head style, 0.406 inches head height, width between flats: between 1.052 inches and 1.065 inches .

Manufacturer part number 3M33-12D21 for national stock number 5306000617861.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-00-061-7861.

  • MPN or Model

    3M33-12D21

  • 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.)
    2 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    1.094 inches
  • Fastener Length
    Between 2.390 inches and 2.437 inches
  • Head Style
    Hexagon
  • Head Height
    0.406 inches
  • Width Between Flats
    Between 1.052 inches and 1.065 inches
  • Grip Diameter
    Between 0.7481 inches and 0.7488 inches
  • Shank Unthreaded Hole Diameter
    0.141 inches first hole and 0.146 inches first hole
  • Thread Diameter
    0.750 inches
  • Grip Length
    Between 1.302 inches and 1.322 inches
  • Thready Qty Per Inch (tpi)
    16
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    2.171 inches first hole and 2.203 inches first hole
  • Surface Finish
    32.0 microinches grip
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5735 assn standard single material response
  • Thread Series Designator
    Unf
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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 5306000617861

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
3M33-12D21 Boeing Company, The
3M33-12D21 Arconic Global Fasteners & Rings,
3M33-12D21 Valley-todeco, Inc.
3M33-12D21 Federal Manufacturing Corporation
3M33-12D21 Sps Technologies, Llc
3M33-12D21 Alcoa Global Fasteners, Inc.
3M33-12D21 Textron Fastening Systems
3M33-12D21 Newport Aeronautical Sales
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