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NSN 5305-01-047-4001

High Torque Screw

About this product

Between 2.238 inches and 2.285 inches fastener length, flat countersunk head style, between 0.451 inches and 0.507 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number 51B334-31H for national stock number 5305010474001.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-047-4001.

  • MPN or Model

    51B334-31H

  • 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)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.290 inches and 0.357 inches
  • Fastener Length
    Between 2.238 inches and 2.285 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.451 inches and 0.507 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 1.928 inches and 1.948 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
  • Countersink Angle
    100.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    2.112 inches first hole and 2.179 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, type 2 cl 2 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 5305010474001

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
51B334-31H Northrop Grumman Technical Services,
51B334-31H Northrop Grumman Systems Corporation
51B334-31H Arconic Global Fasteners & Rings,
51B334-31H Sps Technologies, Llc
51B334-31H Sps Technologies, Llc
51B334-31H Hi-shear Corporation
51B334-31H Sps Technologies, Llc
51B334-31H Alcoa Global Fasteners, Inc.
51B334-31H Lisi Aerospace Canada Corp
51B334-31H Northrop Grumman Systems Corporation
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