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NSN 5306-01-255-1029

Close Tolerance Hex Head Bolt

About this product

Between 0.881 inches and 0.928 inches fastener length, spline drive shear head head style, 0.164 inches head height, grip diameter: between 0.2490 inches and 0.2495 inches .

Manufacturer part number ST3M747-4-8 for national stock number 5306012551029.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-255-1029.

  • MPN or Model

    ST3M747-4-8

  • 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 0.471 inches and 0.538 inches
  • Fastener Length
    Between 0.881 inches and 0.928 inches
  • Head Style
    Spline drive shear head
  • Head Height
    0.164 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2495 inches
  • Head Minor Diameter
    Between 0.448 inches and 0.455 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.390 inches and 0.410 inches
  • Features Provided
    Finished head
  • Thready Qty Per Inch (tpi)
    28
  • Material
    Steel comp xm-13
  • Material Specification
    Ams5629 assn standard single material response
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 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 5306012551029

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M747-4-8 Boeing Company, The
S397-4-8 Huck International, Inc.
11833-4-8 Reid Products Inc.
VCG0002-4-8 Valley-todeco, Inc.
AIC688-4-8 Sps Technologies, Llc
PBF1266-4-8 Sps Technologies, Llc
VS3191-4-8 Alcoa Global Fasteners, Inc.
MB155-4-8 Hi-shear Corporation
122896-4-8 Sps Technologies, Llc
MB155-4-8 Lisi Aerospace Canada Corp
S397-4-8 Huck Intl Inc
VS3191-4-8 Arconic Global Fasteners & Rings,
GS1031-4-8 B & B Specialties Inc.
ST3M747-4-8 Heartland Precision Fasteners, Inc.
Stock Check
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