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NSN 5305-01-143-6539

High Torque Screw

About this product

Between 1.516 inches and 1.546 inches fastener length, flat countersunk head style, between 0.338 inches and 0.381 inches head diameter, grip diameter: between 0.1890 inches and 0.1895 inches .

Manufacturer part number ST3M454-3L18 for national stock number 5305011436539.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-143-6539.

  • MPN or Model

    ST3M454-3L18

  • 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 0.381 inches and 0.431 inches
  • Fastener Length
    Between 1.516 inches and 1.546 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.338 inches and 0.381 inches
  • Grip Diameter
    Between 0.1890 inches and 0.1895 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 1.115 inches and 1.135 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp xm-13
  • Material Specification
    Ams 5629 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 Screw

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Mechanic Bill explains High Torque Screw

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NSN 5305011436539

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M454-3L18 Boeing Company, The
HT4025L3-18 Huck International, Inc.
HT4025L3-18 Hi-shear Corporation
HT4025L3-18 Sps Technologies, Llc
HT4025L3-18 Alcoa Global Fasteners, Inc.
HT4025L3-18 Lisi Aerospace Canada Corp
ST3M454-3L18 Arconic Global Fasteners & Rings,
ST3M454-3L18 Fastener Innovation Technology, Inc.
11905-3L18 Reid Products Inc.
ST3M454-3L18 West Coast Aerospace Inc
ST3M454-3L18 Sps Technologies Ltd Tj Brooks
HT4025L3-18 Huck Intl Inc
Stock Check
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