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NSN 5305-00-253-5230

High Torque Screw

About this product

Plunger operated,two spring loaded retaining balls.

Manufacturer part number NASM21125 for national stock number 5305002535230.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-253-5230.

  • MPN or Model

    NASM21125

  • 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 2.356 inches and 2.376 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
  • Grip Diameter
    Between 0.2487 inches and 0.2492 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.937 inches and 1.953 inches
  • Thready Qty Per Inch (tpi)
    28
  • Surface Finish
    32.0 microinches grip
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Steel comp 631 or steel comp 302 or steel comp 440c
  • 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 5305002535230

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NASM21125 National Aerospace Standards
NASM23964 National Aerospace Standards
AS116-04-31 Avibank Mfg., Inc.
MS21125-0431 National Aerospace Standards
MS21125-0431 Military Standards
MIL-B-23964 Military Specifications
CA2652-04-31 Arconic Global Fasteners & Rings,
AS116-04-31 Avibank Mfg., Inc.
CA2652-04-31 Arconic Global Fasteners & Rings,
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