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NSN 5305-01-004-4094

High Torque Screw

About this product

Between 3.226 inches and 3.246 inches fastener length, flat chamfer head style, between 0.722 inches and 0.740 inches head diameter, head height: between 0.189 inches and 0.204 inches .

Manufacturer part number MS21125-643 for national stock number 5305010044094.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-004-4094.

  • MPN or Model

    MS21125-643

  • 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 0.351 inches and 0.402 inches
  • Fastener Length
    Between 3.226 inches and 3.246 inches
  • Head Style
    Flat chamfer
  • Head Diameter
    Between 0.722 inches and 0.740 inches
  • Head Height
    Between 0.189 inches and 0.204 inches
  • Locking Feature
    Detent ball grip
  • Grip Diameter
    Between 0.3737 inches and 0.3742 inches
  • Shank Unthreaded Hole Diameter
    0.106 inches first hole and 0.116 inches first hole
  • Internal Drive Style
    Slot
  • Thread Diameter
    0.375 inches
  • Grip Length
    Between 2.688 inches and 2.704 inches
  • Thready Qty Per Inch (tpi)
    24
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    3.099 inches first hole and 3.119 inches first hole
  • Surface Finish
    32.0 microinches grip
  • Material
    Steel comp 630
  • Material Specification
    Ams 5643 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416, type 2, cl 1 federal specification single 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 5305010044094

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
MS21125-643 National Aerospace Standards
MS21125-643 Military Standards
MS21125A643 Military Standards
CA2651-6-43 Arconic Global Fasteners & Rings,
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