1-321-802-5889

NSN 5306-01-077-9919

Close Tolerance Hex Head Bolt

About this product

Between 1.473 inches and 1.493 inches fastener length, double hexagon head style, 0.164 inches head height, width between flats: between 0.430 inches and 0.439 inches .

Manufacturer part number 121933-4-18 for national stock number 5306010779919.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-077-9919.

  • MPN or Model

    121933-4-18

  • 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
    0.358 inches
  • Fastener Length
    Between 1.473 inches and 1.493 inches
  • Head Style
    Double hexagon
  • Head Height
    0.164 inches
  • Width Between Flats
    Between 0.430 inches and 0.439 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2495 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.115 inches and 1.135 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    125000 pounds per square inch
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    1.355 inches all holes and 1.375 inches all holes
  • Material
    Stainless steel
  • Material Specification
    Ams5629 assn standard single material response
  • Surface Treatment
    Passivate
  • Thread Series Designator
    Unf
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 5306010779919

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
121933-4-18 Sps Technologies, Llc
ST3M750-4-18 Boeing Company, The
ST3M750-4-18 Valley-todeco, Inc.
ST3M750-4-18 Arconic Global Fasteners & Rings,
ST3M750-4-18 Sps Technologies, Llc
ST3M750-4-18 Heartland Precision Fasteners, Inc.
ST3M750-4-18 Space-lok, Inc.
ST3M750-4-18 Huck International, Inc.
ST3M750-4-18 B & B Specialties Inc.
ST3M750-4-18 Houston Precision Fasteners I, Lp
ST3M750-4-18 Sps Technologies, Llc
ST3M750-4-18 Sps Technologies, Llc
ST3M750-4-18 Fastener Innovation Technology, Inc.
ST3M750-4-18 Reid Products Inc.
ST3M750-4-18 West Coast Aerospace Inc
ST3M750-4-18 Sps Technologies, Llc
ST3M750-4-18 Alcoa Global Fasteners, Inc.
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