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NSN 5305-00-107-1984

High Torque Screw

About this product

Aluminum grommet 0.012 in. Thk on bearing surface of head.

Manufacturer part number 51B294-4 for national stock number 5305001071984.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-107-1984.

  • MPN or Model

    51B294-4

  • 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 0.254 inches and 0.357 inches
  • Fastener Length
    Between 0.550 inches and 0.597 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.496 inches and 0.510 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    28
  • 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 5305001071984

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
51B294-4 Northrop Grumman Technical Services,
150005-4 Monadnock Company, The
51B294-4 Northrop Grumman Systems Corporation
51B294-4 Arconic Global Fasteners & Rings,
51B294-4 Sps Technologies, Llc
51B294-4 Sps Technologies, Llc
51B294-4 Monadnock Company, The
51B294-4 Hi-shear Corporation
51B294-4 Sps Technologies, Llc
51B294-4 Lisi Aerospace Canada Corp
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