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NSN 5306-01-521-2052

Close Tolerance Hex Head Bolt

About this product

0.698 inches fastener length, flat countersunk head style, between 0.338 inches and 0.381 inches head diameter, grip diameter: between 0.188 inches and 0.189 inches .

Manufacturer part number NAS7503-6 for national stock number 5306015212052.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-521-2052.

  • MPN or Model

    NAS7503-6

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.323 inches
  • Fastener Length
    0.698 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.338 inches and 0.381 inches
  • Grip Diameter
    Between 0.188 inches and 0.189 inches
  • Thread Diameter
    0.190 inches
  • Grip Length
    0.375 inches
  • Thready Qty Per Inch (tpi)
    32
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 assn standard single material response or ams 5732 assn standard single material response or ams 5737 assn standard single material response or ams 5853 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416, tyii, cl2 federal specification single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas7503 professional/industrial association standard
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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 5306015212052

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS7503-6 National Aerospace Standards
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