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NSN 5305-00-450-7449

High Torque Screw

About this product

Between 0.640 inches and 0.687 inches fastener length, flat countersunk head style, between 0.502 inches and 0.507 inches head diameter, grip diameter: between 0.2490 inches and 0.2495 inches .

Manufacturer part number HT123-4-3D for national stock number 5305004507449.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-450-7449.

  • MPN or Model

    HT123-4-3D

  • 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 0.442 inches and 0.509 inches
  • Fastener Length
    Between 0.640 inches and 0.687 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.502 inches and 0.507 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2495 inches
  • Shank Unthreaded Hole Diameter
    0.070 inches first hole
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.178 inches and 0.198 inches
  • Thready Qty Per Inch (tpi)
    28
  • Hardness Rating
    248.0 brinell standard and 341.0 rockwell superficial 15-n
  • Countersink Angle
    100.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.500 inches first hole
  • Surface Finish
    32.0 microinches threads
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5732 assn standard single material response
  • Thread Series Designator
    Unf
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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 5305004507449

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HT123-4-3D Huck International, Inc.
54291-4D3 Sps Technologies, Llc
HT4N-3D Hi-shear Corporation
HT4N-3D Lisi Aerospace Canada Corp
HT1029A4T3 Arconic Global Fasteners & Rings,
HT1029A4T3 Alcoa Fastening Systems
HT4M-3D Alcoa Fastening Systems
3M123-4D3 Boeing Company, The
54291-4D3 Sps Technologies, Llc
54291-4D3 Sps Technologies Inc
E1284D3P Huck Intl Inc
HT123-4-3D Huck Intl Inc
HT1029A4T3 Alcoa Global Fasteners, Inc.
3M123-4 Boeing Company, The
HT4M-3D Hi-shear Corporation
Stock Check
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