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NSN 5306-01-579-4501

Close Tolerance Hex Head Bolt

About this product

Bolt has a drilled head (3 holes each with 0.046 to 0.056 inch diameters);also has a drilled shank with 0.070 to 0.080 inch diameter.

Manufacturer part number NAS6203-4DH for national stock number 5306015794501.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-579-4501.

  • MPN or Model

    NAS6203-4DH

  • 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
    Between 0.558 inches and 0.588 inches
  • Head Style
    Dished hexagon
  • Head Height
    0.110 inches
  • Width Between Flats
    Between 0.367 inches and 0.376 inches
  • Grip Diameter
    Between 0.1885 inches and 0.1895 inches
  • Shank Unthreaded Hole Diameter
    0.070 inches first hole and 0.080 inches first hole
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    32
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.504 inches
  • Part Name Assigned By Controlling Agency
    Bolt, tension, hex head, close tolerance, alloy steel, short thread, reduced major thread dia., self-locking, 160 ksi ftu
  • Material
    Steel
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Ams qq-p-416, type ii, class 2 assn standard single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas6203 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 5306015794501

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS6203-4DH National Aerospace Standards
NAS6203-4DH National Aerospace Standards
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