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NSN 5306-01-039-8499

Close Tolerance Hex Head Bolt

About this product

Head out of round.

Manufacturer part number B492329 for national stock number 5306010398499.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-039-8499.

  • MPN or Model

    B492329

  • 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)
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.580 inches and 0.662 inches
  • Fastener Length
    1.200 inches
  • Head Style
    Dee chamfer
  • Head Diameter
    1.080 inches
  • Head Height
    0.150 inches
  • Distance From Centerline To Flat
    Between 0.205 inches and 0.210 inches
  • Grip Diameter
    Between 0.2489 inches and 0.2495 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.538 inches and 0.620 inches
  • Thready Qty Per Inch (tpi)
    28
  • Surface Finish
    63.0 microinches bearing surface of head
  • Material
    Stainless steel
  • 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 5306010398499

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
B492329 Rolls-royce Airlines
B492329 North Bridge Fasteners Inc
B492329 Rolls-royce Military Aero Engines
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