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NSN 5305-01-455-9829

High Torque Screw

About this product

Between 1.660 inches and 1.690 inches fastener length, flat countersunk head style, between 0.605 inches and 0.674 inches head diameter, grip diameter: between 0.4365 inches and 0.4370 inches .

Manufacturer part number NAS1581K7T25 for national stock number 5305014559829.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-455-9829.

  • MPN or Model

    NAS1581K7T25

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.675 inches
  • Fastener Length
    Between 1.660 inches and 1.690 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.605 inches and 0.674 inches
  • Grip Diameter
    Between 0.4365 inches and 0.4370 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.438 inches
  • Grip Length
    Between 1.552 inches and 1.572 inches
  • Thready Qty Per Inch (tpi)
    20
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Titanium alloy uns r56400
  • Material Specification
    Ams 4928 assn standard single material response or ams 4967 assn standard single material response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-1581 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 5305014559829

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581K7T25 National Aerospace Standards
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