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NSN 5305-01-521-5771

High Torque Screw

About this product

Item has drilled threads.

Manufacturer part number ST3M557-3D4 for national stock number 5305015215771.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-521-5771.

  • MPN or Model

    ST3M557-3D4

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.381 inches and 0.431 inches
  • Fastener Length
    0.671 inches
  • Head Style
    Fillister countersunk
  • Head Diameter
    Between 0.297 inches and 0.302 inches
  • Head Height
    0.013 inches
  • Grip Diameter
    Between 0.189 inches and 0.190 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.240 inches and 0.250 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    99.0 degrees
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Stainless steel
  • Thread Series Designator
    Unjf
More from these suppliers
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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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M557-3D4 Boeing Company, The
11923-3D4 Reid Products Inc.
HT4027-3D4 Arconic Global Fasteners & Rings,
HT4027-3D4 Sps Technologies, Llc
Stock Check
Availability for this item was last checked on 02/04/21. The quantities and conditions available at the time were:
  • NE: 25