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NSN 5306-01-314-7759

Close Tolerance Hex Head Bolt

About this product

Thread is a safety critical thread per mil-s-7742 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.

Manufacturer part number 02556 for national stock number 5306013147759.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-314-7759.

  • MPN or Model

    02556

  • 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.)
    0.2 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.782 inches
  • Fastener Length
    Between 2.334 inches and 2.375 inches
  • Head Style
    Hexagon
  • Head Height
    Between 0.265 inches and 0.297 inches
  • Width Between Flats
    Between 0.740 inches and 0.752 inches
  • Grip Diameter
    Between 0.4986 inches and 0.4991 inches
  • Thread Diameter
    0.500 inches
  • Grip Length
    Between 1.546 inches and 1.578 inches
  • Thready Qty Per Inch (tpi)
    20
  • Hardness Rating
    26.0 rockwell c and 32.0 rockwell c
  • Criticality Code Justification
    Thsd
  • Surface Finish
    63.0 microinches grip
  • Material
    Steel comp 4140 or steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4130
  • Material Specification
    Mil-s-5626 military specification 1st material response or mil-s-6049 military specification 2nd material response or mil-s-6050 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6758 military specification 5th material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 type 2 cl 3 federal specification all treatment responses
  • 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 5306013147759

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
02556 Defense Logistics Agency
8936438-01 Defense Logistics Agency
8936438-01 Warner Robins Air Logistics Center
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