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NSN 5305-01-437-4999

High Torque Screw

About this product

Grip chamfer at threads 35.0 degrees.

Manufacturer part number SC2657-4-7P for national stock number 5305014374999.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-437-4999.

  • MPN or Model

    SC2657-4-7P

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.318 inches
  • Fastener Length
    Between 0.730 inches and 0.760 inches
  • Head Style
    Hexagon
  • Head Height
    Between 0.125 inches and 0.140 inches
  • Width Between Flats
    Between 0.430 inches and 0.439 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    Torque-set ribbed
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Minimum Yield Strength
    95000 pounds per square inch
  • Surface Finish
    32.0 microinches threads
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 assn standard single material response or ams 5737 assn standard single material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416, type 2, class 2 federal specification all treatment responses
  • 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 5305014374999

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
SC2657-4-7P Arconic Global Fasteners & Rings,
S00464-4-7P Boeing Company, The
SC2657-4-7P Arconic Global Fasteners & Rings,
S00464-4-7P Boeing Company, The
Stock Check
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