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NSN 5305-00-105-6881

High Torque Screw

About this product

Aluminum grommet .012 in. Thk on bearing surface of head.

Manufacturer part number 51B293-4 for national stock number 5305001056881.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-105-6881.

  • MPN or Model

    51B293-4

  • 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)
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.219 inches and 0.317 inches
  • Fastener Length
    Between 0.510 inches and 0.557 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.375 inches and 0.387 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 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    32
  • Min. Tensile Strength (psi)
    180000 pounds per square inch
  • Countersink Angle
    100.0 degrees
  • Surface Finish
    32.0 microinches grip
  • Material
    Steel comp 430fse or steel comp 81b45 or steel comp 4140 or steel comp 302b
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 type 2 cl 3 federal specification single treatment response
  • 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 5305001056881

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
51B293-4 Sps Technologies, Llc
51B293-4 Northrop Grumman Technical Services,
51B293-4 Sps Technologies, Llc
51B293-4 Monadnock Company, The
51B293-4 Hi-shear Corporation
51B293-4 Lisi Aerospace Canada Corp
51B293-4 Huck International, Inc.
51B293-4 Huck Intl Inc
51B293-4 Northrop Grumman Systems Corporation
51B293-4 Arconic Global Fasteners & Rings,
51B293-4 Sps Technologies, Llc
51B293-4 Alcoa Global Fasteners, Inc.
51B293-4 Northrop Grumman Systems Corporation
Stock Check
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