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NSN 5305-01-521-9552

High Torque Screw

About this product

1.906 inches fastener length, flat countersunk head style, between 0.293 inches and 0.301 inches head diameter, spline major diameter: between 0.154 inches and 0.156 inches .

Manufacturer part number ST3M557-3-24 for national stock number 5305015219552.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-521-9552.

  • MPN or Model

    ST3M557-3-24

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.313 inches
  • Fastener Length
    1.906 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.293 inches and 0.301 inches
  • Spline Major Diameter
    Between 0.154 inches and 0.156 inches
  • Grip Diameter
    Between 0.1885 inches and 0.1895 inches
  • Internal Drive Style
    Torx
  • Thread Diameter
    0.190 inches
  • Grip Length
    1.500 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    99.0 degrees and 101.0 degrees
  • Part Name Assigned By Controlling Agency
    Bolt, 100 degree reduced head, geardrive recess-special thread length inconcel 718 (125 ksi shear)
  • Material
    Nickel alloy 718
  • Material Specification
    Bps-f-69 mfr ref single material response
  • Surface Treatment
    Passivate
  • 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 5305015219552

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M557-3-24 Boeing Company, The
ST3M557-3-24 Arconic Global Fasteners & Rings,
ST3M557-3-24 Fastener Innovation Technology, Inc.
ST3M557-3-24 Sps Technologies, Llc
ST3M557-3-24 West Coast Aerospace Inc
ST3M557-3-24 Hi-shear Corporation
ST3M557-3-24 Sps Technologies, Llc
ST3M557-3-24 Lisi Aerospace Canada Corp
HT4027-3-24 Sps Technologies Inc
ST3M557-3-24 Sps Technologies Inc
ST3M557 Boeing Company, The
HT4027-3-24 Arconic Global Fasteners & Rings,
HT4027-3-24 Sps Technologies, Llc
WC4027-3-24 West Coast Aerospace Inc
HT4027-3-24 Hi-shear Corporation
HT4027-3-24 Sps Technologies, Llc
ST3M557-3-24 Twist Tite Mfg, Inc
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