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NSN 5305-01-193-0153

High Torque Screw

About this product

Between 3.285 inches and 3.315 inches fastener length, flat countersunk head style, between 0.6047 inches and 0.6741 inches head diameter, grip diameter: between 0.4360 inches and 0.4370 inches .

Manufacturer part number NAS1581A7H42 for national stock number 5305011930153.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-193-0153.

  • MPN or Model

    NAS1581A7H42

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.650 inches and 0.700 inches
  • Fastener Length
    Between 3.285 inches and 3.315 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.6047 inches and 0.6741 inches
  • Grip Diameter
    Between 0.4360 inches and 0.4370 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.438 inches
  • Grip Length
    Between 2.615 inches and 2.635 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
  • Surface Finish
    32.0 microinches threads
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Steel comp 4140 or steel comp e4340 or steel comp 6150 or steel comp 8735 or steel comp 8740
  • Surface Treatment
    Cadmium and chromate
  • 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 5305011930153

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581A7H42 National Aerospace Standards
NAS1581A7H42 National Aerospace Standards
NAS1581A7H42 National Aerospace Standards
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