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NSN 5305-00-108-9698

High Torque Screw

About this product

Between 1.731 inches and 1.751 inches fastener length, flat chamfer head style, between 0.477 inches and 0.492 inches head diameter, head height: between 0.126 inches and 0.141 inches .

Manufacturer part number MS21125-4-21 for national stock number 5305001089698.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-108-9698.

  • MPN or Model

    MS21125-4-21

  • 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 0.278 inches and 0.329 inches
  • Fastener Length
    Between 1.731 inches and 1.751 inches
  • Head Style
    Flat chamfer
  • Head Diameter
    Between 0.477 inches and 0.492 inches
  • Head Height
    Between 0.126 inches and 0.141 inches
  • Locking Feature
    Detent ball grip
  • Grip Diameter
    Between 0.2487 inches and 0.2492 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches and 0.086 inches first hole
  • Internal Drive Style
    Slot
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.312 inches and 1.328 inches
  • Thready Qty Per Inch (tpi)
    28
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    1.635 inches and 1.655 inches first hole
  • Surface Finish
    32.0 microinches grip
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Steel comp 302 spring
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 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 5305001089698

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
MS21125-4-21 National Aerospace Standards
MS21125-4-21 Military Standards
CA2651-4-21 Arconic Global Fasteners & Rings,
CA2651-4-21 Arconic Global Fasteners & Rings,
Stock Check
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