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NSN 5305-01-504-0085

High Torque Screw

About this product

1.737 inches fastener length, flat countersunk head style, between 0.108 inches and 0.118 inches head diameter, internal drive style: recessed type i.

Manufacturer part number NAS1974-21H for national stock number 5305015040085.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-504-0085.

  • MPN or Model

    NAS1974-21H

  • Schedule B
    7616.10.6000 (Threaded fasteners of aluminum)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.425 inches
  • Fastener Length
    1.737 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.108 inches and 0.118 inches
  • Internal Drive Style
    Recessed type i
  • Thread Diameter
    0.2500 inches
  • Grip Length
    1.312 inches
  • Thready Qty Per Inch (tpi)
    28
  • Countersink Angle
    100.0 degrees
  • Material
    Aluminum alloy
  • Material Specification
    Mil-s-5626 military specification 2nd material response
  • 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 5305015040085

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1974-21H National Aerospace Standards
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