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NSN 5305-01-219-5946

High Torque Screw

About this product

Internal drive ribbed.

Manufacturer part number NAS1578C3T21 for national stock number 5305012195946.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-219-5946.

  • MPN or Model

    NAS1578C3T21

  • 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
    Between 0.338 inches and 0.388 inches
  • Fastener Length
    Between 1.660 inches and 1.690 inches
  • Head Style
    Pan no. 2
  • Head Diameter
    Between 0.360 inches and 0.374 inches
  • Head Height
    Between 0.115 inches and 0.125 inches
  • Grip Diameter
    Between 0.1885 inches and 0.1895 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 1.302 inches and 1.322 inches
  • Thready Qty Per Inch (tpi)
    32
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Surface Finish
    32.0 microinches threads
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 assn standard single material response or ams 5732 assn standard single material response or ams 5737 assn standard single material response
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 federal specification single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas1578 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 5305012195946

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1578C3T21 National Aerospace Standards
NAS1578C3R21 National Aerospace Standards
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