1-321-802-5889

NSN 5305-01-626-0694

High Torque Screw

About this product

2.3435 inches fastener length, flat countersunk head style, between 0.612 inches and 0.672 inches head diameter, grip diameter: between 0.4365 inches and 0.4370 inches .

Manufacturer part number ST3M557-7-27 for national stock number 5305016260694.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-626-0694.

  • MPN or Model

    ST3M557-7-27

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.656 inches
  • Fastener Length
    2.3435 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.612 inches and 0.672 inches
  • Grip Diameter
    Between 0.4365 inches and 0.4370 inches
  • Internal Drive Style
    High-torque
  • End Application
    F-15sa
  • Thread Diameter
    0.4375 inches
  • Grip Length
    1.6875 inches
  • Thready Qty Per Inch (tpi)
    20
  • Min. Tensile Strength (psi)
    125000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Nickel alloy 718
  • Surface Treatment
    Passivate
  • Thread Series Designator
    Unjf
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 5305016260694

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M557-7-27 Valley-todeco, Inc.
ST3M557-7-27 Boeing Company, The
HT4027-7-27 Sps Technologies, Llc
11923-7-27 Reid Products Inc.
WC4027-7-27 West Coast Aerospace Inc
Stock Check
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