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NSN 5305-00-004-2985

High Torque Screw

About this product

1.113 inches fastener length, between 0.2485 inches and 0.2495 inches grip diameter, high-torque internal drive style, thread diameter: 0.250 inches.

Manufacturer part number A51G20551-13 for national stock number 5305000042985.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-004-2985.

  • MPN or Model

    A51G20551-13

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • NMF (National Motor Freight)
    136500 - Metal NOI/metal Alloys NOI
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.426 inches
  • Fastener Length
    1.113 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    0.687 inches
  • Thready Qty Per Inch (tpi)
    28
  • Material
    Titanium alloy
  • Thread Series Designator
    Unf
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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 5305000042985

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
A51G20551-13 Northrop Grumman Systems Corporation
A51G20551-11 Northrop Grumman Systems Corporation
A51G20551-11 Northrop Grumman Systems Corporation
A51G20551-13 Northrop Grumman Systems Corporation
A51G20551-13 Howe Machine & Tool Corp.
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