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NSN 5305-01-048-1143

High Torque Screw

About this product

Between 3.676 inches and 3.723 inches fastener length, pan head style, between 0.464 inches and 0.488 inches head diameter, head height: between 0.133 inches and 0.150 inches .

Manufacturer part number 51B222-54H for national stock number 5305010481143.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-048-1143.

  • MPN or Model

    51B222-54H

  • 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 0.286 inches and 0.363 inches
  • Fastener Length
    Between 3.676 inches and 3.723 inches
  • Head Style
    Pan
  • Head Diameter
    Between 0.464 inches and 0.488 inches
  • Head Height
    Between 0.133 inches and 0.150 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Shank Unthreaded Hole Diameter
    0.066 inches first hole and 0.086 inches first hole
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 3.360 inches and 3.390 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    180000 pounds per square inch
  • Hardness Rating
    39.0 rockwell c and 43.0 rockwell c
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    3.575 inches first hole
  • Surface Finish
    32.0 microinches grip
  • Material
    Steel comp e4340 or steel comp 4140 or steel comp 8740
  • Material Specification
    Mil-s-5000 military specification 1st material response or mil-s-5626 military specification 2nd material response or mil-s-6049 military specification 3rd material response
  • Surface Treatment
    Cadmium and chromate or cadmium
  • Surface Treatment Specification
    Qq-p-416 ty2 cl2 federal specification 1st treatment response or nas 672 assn standard 2nd treatment 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 5305010481143

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
51B222-54H Northrop Grumman Technical Services,
51B222-54H Northrop Grumman Systems Corporation
51B222-54H Arconic Global Fasteners & Rings,
51B222-54H Sps Technologies, Llc
51B222-54H Sps Technologies, Llc
51B222-54H Hi-shear Corporation
51B222-54H Sps Technologies, Llc
51B222-54H Alcoa Global Fasteners, Inc.
51B222-54H Lisi Aerospace Canada Corp
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