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NSN 5306-01-642-1920

Close Tolerance Hex Head Bolt

About this product

0.7505 inches fastener length, flat countersunk head style, between 0.429 inches and 0.477 inches head diameter, grip diameter: 0.3125 inches .

Manufacturer part number NAS8702U5 for national stock number 5306016421920.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-642-1920.

  • MPN or Model

    NAS8702U5

  • 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
    0.438 inches
  • Fastener Length
    0.7505 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.429 inches and 0.477 inches
  • Grip Diameter
    0.3125 inches
  • Internal Drive Style
    Cross recess type 1
  • Thread Diameter
    0.3125 inches
  • Grip Length
    0.3125 inches
  • Thready Qty Per Inch (tpi)
    24
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Stainless steel
  • Surface Treatment
    Passivate
  • 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 5306016421920

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS8702U5 Genuine Aircraft Hardware Company
NAS8702U5 National Aerospace Standards
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