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NSN 5306-00-025-3789

Close Tolerance Hex Head Bolt

About this product

With strip or patch or button type element on threads for locking feature.

Manufacturer part number NAS1225C4 for national stock number 5306000253789.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-00-025-3789.

  • MPN or Model

    NAS1225C4

  • 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 0.444 inches and 0.494 inches
  • Fastener Length
    Between 0.704 inches and 0.734 inches
  • Head Style
    Dished hexagon
  • Head Height
    Between 0.156 inches and 0.171 inches
  • Width Between Flats
    Between 0.492 inches and 0.502 inches
  • Locking Feature
    Patch threads or pellet threads or strip threads
  • Grip Diameter
    Between 0.3115 inches and 0.3120 inches
  • Thread Diameter
    0.313 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    140000 pounds per square inch
  • Surface Finish
    63.0 microinches grip
  • Material
    Plastic polyamide locking feature
  • Material Specification
    Ams 5735 assn standard single material response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas1225 professional/industrial association standard
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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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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1225C4 National Aerospace Standards
LK1225C4 Torkon Fastener Corp
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