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NSN 5305-01-375-2387

High Torque Screw

About this product

Between 2.452 inches and 2.499 inches fastener length, flat countersunk undercut head style, between 0.880 inches and 0.890 inches head diameter, head height: 0.188 inches .

Manufacturer part number NAS337A23 for national stock number 5305013752387.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-375-2387.

  • MPN or Model

    NAS337A23

  • 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
    0.656 inches
  • Fastener Length
    Between 2.452 inches and 2.499 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.880 inches and 0.890 inches
  • Head Height
    0.188 inches
  • Grip Diameter
    Between 0.4358 inches and 0.4367 inches
  • Internal Drive Style
    Hexagon
  • Thread Diameter
    0.4375 inches
  • Grip Length
    1.812 inches
  • Width Across Flats
    Between 0.3135 inches and 0.3165 inches
  • Thready Qty Per Inch (tpi)
    20
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    100.0 degrees
  • Material
    Steel comp 4140
  • Material Specification
    Mil-s-5626 military specification single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416, ty ii, cl 2 federal specification single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas337a23 professional/industrial association standard
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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 5305013752387

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS337A23 National Aerospace Standards
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