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NSN 5306-00-250-5561

Close Tolerance Hex Head Bolt

About this product

Between 2.312 inches and 2.359 inches fastener length, hexagon head style, between 0.203 inches and 0.235 inches head height, width between flats: between 0.553 inches and 0.565 inches .

Manufacturer part number AN176C22A for national stock number 5306002505561.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-00-250-5561.

  • MPN or Model

    AN176C22A

  • 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
    Between 0.609 inches and 0.687 inches
  • Fastener Length
    Between 2.312 inches and 2.359 inches
  • Head Style
    Hexagon
  • Head Height
    Between 0.203 inches and 0.235 inches
  • Width Between Flats
    Between 0.553 inches and 0.565 inches
  • Grip Diameter
    Between 0.3737 inches and 0.3742 inches
  • Thread Diameter
    0.375 inches
  • Grip Length
    Between 1.672 inches and 1.703 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    125000 pounds per square inch
  • Hardness Rating
    26.0 rockwell c and 32.0 rockwell c
  • Material
    Steel comp 431
  • Material Specification
    Mil-s-18732 military specification single material response
  • Surface Treatment
    Passivate
  • 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 5306002505561

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
AN176C22A Aeronautical Standards Group
Stock Check
Availability for this item was last checked on 04/12/24. The quantities and conditions available at the time were:
  • NS: 6
  • NE: 6