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NSN 5305-01-349-9580

High Torque Screw

About this product

Between 2.565 inches and 2.595 inches fastener length, flat countersunk head style, between 0.690 inches and 0.761 inches head diameter, grip diameter: between 0.4990 inches and 0.4995 inches .

Manufacturer part number NAS1581K8T29 for national stock number 5305013499580.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-349-9580.

  • MPN or Model

    NAS1581K8T29

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Unit Weight (Est.)
    0.4 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.743 inches and 0.793 inches
  • Fastener Length
    Between 2.565 inches and 2.595 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.690 inches and 0.761 inches
  • Grip Diameter
    Between 0.4990 inches and 0.4995 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.500 inches
  • Grip Length
    Between 1.802 inches and 1.822 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
  • 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 5305013499580

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581K8T29 National Aerospace Standards
NAS1581V8T29 National Aerospace Standards
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