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NSN 5305-01-390-6463

High Torque Screw

About this product

Between 3.466 inches and 3.496 inches fastener length, flat countersunk head style, between 0.852 inches and 0.933 inches head diameter, grip diameter: between 0.623 inches and 0.624 inches .

Manufacturer part number NAS1581F10T40 for national stock number 5305013906463.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-390-6463.

  • MPN or Model

    NAS1581F10T40

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.981 inches
  • Fastener Length
    Between 3.466 inches and 3.496 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.852 inches and 0.933 inches
  • Grip Diameter
    Between 0.623 inches and 0.624 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.625 inches
  • Grip Length
    Between 2.490 inches and 2.510 inches
  • Thready Qty Per Inch (tpi)
    18
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp 4140
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416, type ii, class 2 federal specification all treatment responses
  • 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 5305013906463

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581F10T40 National Aerospace Standards
NAS1581A10T40 National Aerospace Standards
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