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NSN 5305-01-438-0367

High Torque Screw

About this product

Between 1.829 inches and 1.859 inches fastener length, flat countersunk undercut head style, between 0.5149 inches and 0.5662 inches head diameter, head height: 0.081 inches .

Manufacturer part number NAS1581C6T21 for national stock number 5305014380367.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-438-0367.

  • MPN or Model

    NAS1581C6T21

  • 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
    0.594 inches
  • Fastener Length
    Between 1.829 inches and 1.859 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.5149 inches and 0.5662 inches
  • Head Height
    0.081 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 1.302 inches and 1.322 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    7200 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel
  • Material Specification
    A-286 ams5731, 5732, 5737, 5853 assn standard all material responses
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 military specification all treatment responses
  • Thread Series Designator
    Unjf
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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 5305014380367

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581C6T21 National Aerospace Standards
10335384 Nimikkeistokeskus Ncb Finland
NAS1581C6T21 National Aerospace Standards
10335384 Nimikkeistokeskus Ncb Finland
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