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NSN 5306-01-520-8966

Close Tolerance Hex Head Bolt

About this product

2.8625 inches fastener length, flat countersunk head style, between 0.455 inches and 0.510 inches head diameter, locking feature: pellet locking feature.

Manufacturer part number BACB30LR4D39 for national stock number 5306015208966.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-520-8966.

  • MPN or Model

    BACB30LR4D39

  • 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
    0.425 inches
  • Fastener Length
    2.8625 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.455 inches and 0.510 inches
  • Locking Feature
    Pellet locking feature
  • Grip Diameter
    Between 0.2481 inches and 0.2485 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    2.4375 inches
  • Thready Qty Per Inch (tpi)
    28
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    2.6845 inches first hole
  • Material
    Stainless steel
  • Material Specification
    Ams5737 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416, type ii, class 2 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 5306015208966

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
BACB30LR4D39 The Boeing Company
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