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NSN 5306-01-601-1043

Close Tolerance Hex Head Bolt

About this product

Between 0.917 inches and 0.947 inches fastener length, flat countersunk head style, 0.397 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number NAS8704A9 for national stock number 5306016011043.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-601-1043.

  • MPN or Model

    NAS8704A9

  • 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)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.370 inches
  • Fastener Length
    Between 0.917 inches and 0.947 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    0.397 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • End Application
    C-5 reliability enhancement
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.552 inches and 0.572 inches
  • Thready Qty Per Inch (tpi)
    28
  • 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 5737 assn standard single material response
  • Surface Treatment
    Aluminum
  • Surface Treatment Specification
    Nas 4006 national std/spec single treatment response
  • Thread Series Designator
    Unjc
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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 5306016011043

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS8704A9 Lockheed Martin Corporation
NAS8704A9 National Aerospace Standards
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