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NSN 5306-01-444-6743

Close Tolerance Hex Head Bolt

About this product

3.527 inches fastener length, double hexagon w/hole head style, 0.673 inches head height, width between flats: 0.917 inches .

Manufacturer part number PBF1549-10C38H for national stock number 5306014446743.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-444-6743.

  • MPN or Model

    PBF1549-10C38H

  • Schedule B
    8105.90.0000 (Cobalt, wrought, and articles thereof)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    1.152 inches
  • Fastener Length
    3.527 inches
  • Head Style
    Double hexagon w/hole
  • Head Height
    0.673 inches
  • Width Between Flats
    0.917 inches
  • Extended Washer Diameter
    Between 1.185 inches and 1.195 inches
  • Extended Washer Thickness
    0.125 inches
  • Grip Diameter
    Between 0.6230 inches and 0.6240 inches
  • Thread Diameter
    0.625 inches
  • Grip Length
    2.375 inches
  • Thready Qty Per Inch (tpi)
    18
  • Min. Tensile Strength (psi)
    260000 pounds per square inch
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Cobalt comp mp-35-n
  • Material Specification
    Ams5844 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416 ty2, cl2 federal specification single treatment 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 5306014446743

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
PBF1549-10C38H Sps Technologies, Llc
83048C10H-38 Sps Technologies, Llc
GB511FG10C38H Northrop Grumman Systems Corporation
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