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NSN 5306-01-206-7251

Close Tolerance Hex Head Bolt

About this product

Between 1.497 inches and 1.529 inches fastener length, undercut hexagon head style, between 0.125 inches and 0.140 inches head height, width between flats: between 0.430 inches and 0.439 inches .

Manufacturer part number BACB30LJ4U18 for national stock number 5306012067251.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-206-7251.

  • MPN or Model

    BACB30LJ4U18

  • 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
    Between 0.362 inches and 0.414 inches
  • Fastener Length
    Between 1.497 inches and 1.529 inches
  • Head Style
    Undercut hexagon
  • Head Height
    Between 0.125 inches and 0.140 inches
  • Width Between Flats
    Between 0.430 inches and 0.439 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2496 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.115 inches and 1.135 inches
  • Thready Qty Per Inch (tpi)
    28
  • Surface Finish
    32.0 microinches threads
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5737 assn standard single material response
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 federal specification single 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 5306012067251

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
BACB30LJ4U18 The Boeing Company
BACB30LJ4U18 Huck International, Inc.
BACB30LJ4U18 Valley-todeco, Inc.
BACB30LJ4U18 Sps Technologies, Llc
BACB30LJ4U18 Arconic Global Fasteners & Rings,
BACB30LJ4U18 Federal Manufacturing Corporation
BACB30LJ4U18 Sps Technologies, Llc
BACB30LJ4U18 Sps Technologies, Llc
BACB30LJ4U18 Alcoa Global Fasteners, Inc.
BACB30LJ4U18 Huck Intl Inc
Stock Check
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