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NSN 5305-01-232-6040

High Torque Screw

About this product

Between 1.470 inches and 1.620 inches fastener length, flat countersunk head style, between 0.5149 inches and 0.5662 inches head diameter, grip diameter: between 0.3735 inches and 0.3745 inches .

Manufacturer part number NAS1581A6T5 for national stock number 5305012326040.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-232-6040.

  • MPN or Model

    NAS1581A6T5

  • 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
    0.594 inches
  • Fastener Length
    Between 1.470 inches and 1.620 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.5149 inches and 0.5662 inches
  • Grip Diameter
    Between 0.3735 inches and 0.3745 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.3750 inches
  • Grip Length
    Between 0.302 inches and 0.322 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp 4140 or steel comp 4340 or steel comp 8740
  • Material Specification
    Mil-s-5626 military specification 1st material response and mil-s-5000 military specification 2nd material response and mil-s-6049 military specification 3rd material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416 ty2 cl2 federal specification single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas1581 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 5305012326040

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581A6T5 National Aerospace Standards
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