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NSN 5305-00-810-1266

High Torque Screw

About this product

Between 2.770 inches and 2.837 inches fastener length, flat countersunk head style, 0.507 inches head diameter, grip diameter: between 0.2482 inches and 0.2487 inches .

Manufacturer part number 51B334-40H for national stock number 5305008101266.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-810-1266.

  • MPN or Model

    51B334-40H

  • 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
    0.316 inches
  • Fastener Length
    Between 2.770 inches and 2.837 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    0.507 inches
  • Grip Diameter
    Between 0.2482 inches and 0.2487 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches first hole
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 2.470 inches and 2.490 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    180000 pounds per square inch
  • Countersink Angle
    100.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.116 inches first hole
  • Material
    Steel comp 4340 or steel comp 4140 or steel comp 8740 or steel comp 6150 or steel comp e4340
  • Surface Treatment
    Cadmium or cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 type 1 federal specification 1st treatment response or qq-p-416 type 2 federal specification 2nd 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 5305008101266

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
51B334-40H Northrop Grumman Technical Services,
51B334-40H Northrop Grumman Systems Corporation
51B334-40H Sps Technologies, Llc
51B334-40H Sps Technologies, Llc
51B334-40H Sps Technologies, Llc
51B334-40H Hi-shear Corporation
51B334-40H Alcoa Global Fasteners, Inc.
51B334-40H Lisi Aerospace Canada Corp
51B334-40H Berco Mfg Co
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