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NSN 5306-01-538-6424

Close Tolerance Hex Head Bolt

About this product

Manufacturer's part number bacb30nf7-19 replaced by bacb30lj7-19, reference chapter 54-1, figure and item number 9-48b, 9-48c, 9-48d, 24-57a.

Manufacturer part number BACB30LJ7-19 for national stock number 5306015386424.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-538-6424.

  • MPN or Model

    BACB30LJ7-19

  • 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
    0.541 inches
  • Fastener Length
    Between 12.406 inches and 12.426 inches
  • Head Style
    Dished hexagon
  • Head Height
    Between 0.204 inches and 0.234 inches
  • Width Between Flats
    Between 0.679 inches and 0.690 inches
  • Grip Diameter
    Between 0.4354 inches and 0.4360 inches
  • Point Length
    0.062 inches
  • Point Style
    Flat
  • End Application
    Boeing model 707
  • Thread Diameter
    0.4375 inches
  • Grip Length
    Between 11.865 inches and 11.885 inches
  • Thready Qty Per Inch (tpi)
    20
  • Hole Configuration Style
    Hexagon corners
  • Part Name Assigned By Controlling Agency
    Bolt, hex head, 93 ksi shear, short thread, a286, nonlocking and self-locking
  • Color
    Green
  • Material
    Stainless steel
  • Material Specification
    Ams5737 assn standard single material response or ams5853 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Ams-qq-p-416 assn standard 1st treatment 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 5306015386424

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
BACB30LJ7-19 The Boeing Company
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