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NSN 5306-00-765-4633

Close Tolerance Hex Head Bolt

About this product

1.754 inches fastener length, hexagon head style, 0.125 inches head height, width between flats: 0.438 inches .

Manufacturer part number 51B464-4A23 for national stock number 5306007654633.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-00-765-4633.

  • MPN or Model

    51B464-4A23

  • 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
    0.316 inches
  • Fastener Length
    1.754 inches
  • Head Style
    Hexagon
  • Head Height
    0.125 inches
  • Width Between Flats
    0.438 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    1.438 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    180000 pounds per square inch
  • Hardness Rating
    36.0 rockwell c and 40.0 rockwell c
  • Surface Finish
    32.0 microinches threads
  • Material
    Steel comp e4340 or steel comp 8740 or steel comp 6150 or steel comp 4140
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 ty2 cl3 federal specification single treatment 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 5306007654633

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
51B464-4A23 Northrop Grumman Technical Services,
51B464-4A23 Northrop Grumman Systems Corporation
51B464-4A23 Huck International, Inc.
51B464-4A23 Huck Intl Inc
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