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NSN 5306-00-136-2875

Close Tolerance Hex Head Bolt

About this product

Between 1.139 inches and 1.169 inches fastener length, double hexagon head style, between 0.247 inches and 0.267 inches head height, width between flats: between 0.678 inches and 0.698 inches .

Manufacturer part number GB511B7-11 for national stock number 5306001362875.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-00-136-2875.

  • MPN or Model

    GB511B7-11

  • 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 0.441 inches and 0.491 inches
  • Fastener Length
    Between 1.139 inches and 1.169 inches
  • Head Style
    Double hexagon
  • Head Height
    Between 0.247 inches and 0.267 inches
  • Width Between Flats
    Between 0.678 inches and 0.698 inches
  • Hole Diameter
    0.070 inches
  • Grip Diameter
    Between 0.4358 inches and 0.4367 inches
  • Shank Unthreaded Hole Diameter
    0.105 inches first hole and 0.110 inches first hole
  • Thread Diameter
    0.438 inches
  • Grip Length
    Between 0.678 inches and 0.698 inches
  • Hole Quantity
    2
  • Hole Type
    Drilled
  • Thready Qty Per Inch (tpi)
    20
  • Min. Tensile Strength (psi)
    132000 pounds per square inch
  • Hole Configuration Style
    Double hexagon flats
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    1.014 inches first hole and 1.044 inches first hole
  • Surface Finish
    32.0 microinches bearing surface of head
  • Material
    Steel comp h11
  • Material Specification
    Ams6485 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Nas 672 assn standard 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 5306001362875

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
GB511B7-11 Northrop Grumman Systems Corporation
VS2521F7-11 Alcoa Global Fasteners, Inc.
VS2521F7-11 Arconic Global Fasteners & Rings,
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