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NSN 5305-01-249-0893

High Torque Screw

About this product

Between 1.329 inches and 1.359 inches fastener length, flat countersunk head style, between 0.575 inches and 0.635 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number HT4057-4-14A for national stock number 5305012490893.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-249-0893.

  • MPN or Model

    HT4057-4-14A

  • 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 0.444 inches and 0.494 inches
  • Fastener Length
    Between 1.329 inches and 1.359 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.575 inches and 0.635 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.865 inches and 0.885 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    125000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp xm-13
  • Surface Treatment
    Aluminum
  • Surface Treatment Specification
    Mil-c-83488 type 2 class 3 military 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 5305012490893

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HT4057-4-14A Huck International, Inc.
HT4057-4-14A Arconic Global Fasteners & Rings,
HT4057-4-14A Hi-shear Corporation
HT4057-4-14A Lisi Aerospace Canada Corp
ST3M733-4L-14 Fastener Innovation Technology, Inc.
ST3M733-4L-14 Sps Technologies, Llc
ST3M733-4L-14 West Coast Aerospace Inc
ST3M733-4L-14 Sps Technologies Ltd Tj Brooks
ST3M733-4L-14 Boeing Company, The
HT4057-4-14A Sps Technologies, Llc
ST3M733-4L-14 Sps Technologies Inc
HT4057-4-14A Huck Intl Inc
HT4057-4-14A Alcoa Global Fasteners, Inc.
ST3M733-4L14 Twist Tite Mfg, Inc
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