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NSN 5305-01-055-3812

High Torque Screw

About this product

Between 1.874 inches and 1.904 inches fastener length, flat countersunk head style, between 0.704 inches and 0.762 inches head diameter, grip diameter: between 0.3735 inches and 0.3745 inches .

Manufacturer part number NAS2806-21 for national stock number 5305010553812.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-055-3812.

  • MPN or Model

    NAS2806-21

  • 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
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.552 inches and 0.602 inches
  • Fastener Length
    Between 1.874 inches and 1.904 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.704 inches and 0.762 inches
  • Grip Diameter
    Between 0.3735 inches and 0.3745 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.375 inches
  • Grip Length
    Between 1.302 inches and 1.322 inches
  • Thready Qty Per Inch (tpi)
    24
  • Min. Tensile Strength (psi)
    180000 pounds per square inch
  • Hardness Rating
    36.0 rockwell c and 40.0 rockwell c
  • Countersink Angle
    100.0 degrees
  • Surface Finish
    32.0 microinches threads
  • Material
    Steel comp e4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Nas672 assn standard all treatment responses
  • Thread Series Designator
    Unf
  • Specification Data
    80205-nas2806 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 5305010553812

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS2806-21 National Aerospace Standards
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