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NSN 5306-01-348-7808

Close Tolerance Hex Head Bolt

About this product

Between 1.250 inches and 1.270 inches fastener length, double hexagon extended washer head style, between 0.240 inches and 0.250 inches head height, width between flats: between 0.235 inches and 0.250 inches .

Manufacturer part number MS21297H04008 for national stock number 5306013487808.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-348-7808.

  • MPN or Model

    MS21297H04008

  • 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
    0.495 inches
  • Fastener Length
    Between 1.250 inches and 1.270 inches
  • Head Style
    Double hexagon extended washer
  • Head Height
    Between 0.240 inches and 0.250 inches
  • Width Between Flats
    Between 0.235 inches and 0.250 inches
  • Extended Washer Diameter
    Between 0.460 inches and 0.470 inches
  • Extended Washer Thickness
    Between 0.026 inches and 0.046 inches
  • Grip Diameter
    Between 0.249 inches and 0.250 inches
  • End Application
    Pacer dawn
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.490 inches and 0.510 inches
  • Thready Qty Per Inch (tpi)
    28
  • Material
    Steel comp h11
  • Material Specification
    Ams 6487 assn standard single material response
  • Thread Series Designator
    Unjf
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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 5306013487808

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
MS21297H04008 Military Standards
Stock Check
Availability for this item was last checked on 04/23/24. The quantities and conditions available at the time were:
  • NE: 63