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NSN 5305-01-538-1828

High Torque Screw

About this product

St3m430 series bolts are to be used in fuel sealing application. Temp range -70deg (f) to +350deg (f) grip and thread have dry film lubricant per mil-l-8937 plus cetyl alcohol. Similiar to but not the same as nsn 5305-01-231-7413. The -7413 does not include dryfilm lubricant. Furnished with (1) o-ring.

Manufacturer part number ST3M430V3-9ASM for national stock number 5305015381828.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-538-1828.

  • MPN or Model

    ST3M430V3-9ASM

  • Schedule B
    8108.90.8000 (Other wrought titanium, nesoi)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.380 inches and 0.447 inches
  • Fastener Length
    Between 0.952 inches and 0.999 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.376 inches and 0.381 inches
  • Head Height
    Between 0.044 inches and 0.046 inches
  • Grip Diameter
    0.189 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.552 inches and 0.572 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    100.0 degrees
  • Part Name Assigned By Controlling Agency
    Screw, close tolerance-assembled o-ring
  • Material
    Titanium alloy uns r56400
  • Material Specification
    Nas 621 national std/spec single material 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 5305015381828

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
ST3M430V3-9ASM Boeing Company, The
110179-3-9ASM Sps Technologies, Llc
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