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NSN 5305-01-198-3481

High Torque Screw

About this product

Between 2.606 inches and 2.626 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 MS21125B435 for national stock number 5305011983481.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-198-3481.

  • MPN or Model

    MS21125B435

  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.277 inches and 0.328 inches
  • Fastener Length
    Between 2.606 inches and 2.626 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 threads
  • Grip Diameter
    Between 0.2487 inches and 0.2492 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches first hole and 0.086 inches first hole
  • Internal Drive Style
    Slot
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 2.188 inches and 2.204 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    63000 pounds per square inch
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    2.527 inches first hole and 2.547 inches first hole
  • Surface Finish
    32.0 microinches grip
  • Material
    Steel comp 302 spring or steel comp 631 spring
  • Material Specification
    Astm a580 cond. A assn standard single material response 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 5305011983481

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
MS21125B435 Vereenigde Ingenieursbureaux
AS255B4-35 Avibank Mfg., Inc.
MS21125B435 National Aerospace Standards
MS21125B435 Military Standards
Stock Check
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