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NSN 5305-00-151-8656

High Torque Screw

About this product

Color black,surface of head.

Manufacturer part number GS551P4-621 for national stock number 5305001518656.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-151-8656.

  • MPN or Model

    GS551P4-621

  • 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
    2a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.379 inches and 0.439 inches
  • Fastener Length
    Between 0.954 inches and 0.984 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    0.357 inches
  • Grip Diameter
    Between 0.2540 inches and 0.2550 inches
  • Internal Drive Style
    Slot
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.545 inches and 0.575 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    150000 pounds per square inch
  • Hardness Rating
    33.0 rockwell c
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp 4037
  • Material Specification
    Aisi assn standard single material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416, type 2, cl 2 federal specification single treatment 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 5305001518656

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
GS551P4-621 Sps Technologies, Llc
BM19070-4-621 Huck International, Inc.
PBF1286-621 Sps Technologies, Llc
GS551P4-621 Northrop Grumman Systems Corporation
GS551P4-621 Aero Mechanical Fastening Systems
GS551P4-621 Bfgoodrich Co The
2R1465-8 Bfgoodrich Co The
BM19070-4-621 Huck Intl Inc
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