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NSN 5306-01-383-0480

Close Tolerance Hex Head Bolt

About this product

3thread is safety critical per mil-s-8879 under application category safety critical. Apply one coat of mil-p-23377, ty 1, cl 1 or 3 and two top coats of mil-c-46168, color code 33538 per fed-std-595 to top of head. Grip is under cut for relief.

Manufacturer part number 02321-1 for national stock number 5306013830480.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-383-0480.

  • MPN or Model

    02321-1

  • 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)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.531 inches
  • Fastener Length
    1.031 inches
  • Head Style
    Double hexagon w/hole
  • Head Height
    0.250 inches
  • Width Between Flats
    0.250 inches
  • Extended Washer Diameter
    0.375 inches
  • Extended Washer Thickness
    Between 0.040 inches and 0.050 inches
  • Grip Diameter
    Between 0.1894 inches and 0.1899 inches
  • Thread Diameter
    0.190 inches
  • Grip Length
    0.500 inches
  • Thready Qty Per Inch (tpi)
    32
  • Criticality Code Justification
    Thsd
  • Surface Finish
    32.0 microinches threads
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 assn standard 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 5306013830480

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
02321-1 Defense Logistics Agency
02321-01 Defense Logistics Agency
02321-01 Defense Logistics Agency
02321-1 Defense Logistics Agency
02321-01 Defense Logistics Agency
02321-1 Defense Logistics Agency
02321-01 Defense Logistics Agency
02321-1 Defense Logistics Agency
02321-01 Defense Logistics Agency
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