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NSN 5306-00-332-4479

Close Tolerance Hex Head Bolt

About this product

Between 2.078 inches and 2.108 inches fastener length, double hexagon w/hole head style, between 0.290 inches and 0.310 inches head height, width between flats: between 0.304 inches and 0.313 inches .

Manufacturer part number ST3M571-4-26 for national stock number 5306003324479.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-00-332-4479.

  • MPN or Model

    ST3M571-4-26

  • 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)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.443 inches and 0.493 inches
  • Fastener Length
    Between 2.078 inches and 2.108 inches
  • Head Style
    Double hexagon w/hole
  • Head Height
    Between 0.290 inches and 0.310 inches
  • Width Between Flats
    Between 0.304 inches and 0.313 inches
  • Extended Washer Diameter
    Between 0.428 inches and 0.438 inches
  • Extended Washer Thickness
    Between 0.059 inches and 0.079 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2495 inches
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.615 inches and 1.635 inches
  • Thready Qty Per Inch (tpi)
    28
  • Material
    Stainless steel
  • Surface Treatment
    Passivate
  • Thread Series Designator
    Unf
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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 5306003324479

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M571-4-26 Boeing Company, The
BM3326-4-26 Huck International, Inc.
S371-4-26 Huck International, Inc.
VS3060-4-26 Arconic Global Fasteners & Rings,
MB84-4-26 Hi-shear Corporation
MB84-4-26 Lisi Aerospace Canada Corp
ST3M571-4-26 Sps Technologies, Llc
ST3M571-4-26 Sps Technologies, Llc
ST3M571-4-26 Valley-todeco, Inc.
ST3M571-4-26 J M Precision Inc
ST3M571-4-26 Sonic Industries Inc.
ST3M571-4-26 Sps Technologies, Llc
ST3M571-4-26 Hi-shear Corporation
ST3M571-4-26 Sps Technologies, Llc
ST3M571-4-26 Alcoa Global Fasteners, Inc.
ST3M571-4-26 Lisi Aerospace Canada Corp
74328-4-26 Sps Technologies Inc
BM3326-4-26 Huck Intl Inc
S371-4-26 Huck Intl Inc
AIC752-4-26 Sps Technologies, Llc
S11-1059-4-26 Sonic Industries Inc.
VAL23033-4-26 Valley-todeco, Inc.
74328-4-26 Sps Technologies, Llc
VS3060-4-26 Alcoa Global Fasteners, Inc.
Stock Check
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