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NSN 5305-01-525-4939

High Torque Screw

About this product

0.544 inches fastener length, flat countersunk undercut head style, between 0.3902 inches and 0.3988 inches head diameter, head height: 0.076 inches .

Manufacturer part number NAS2854T4PT for national stock number 5305015254939.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-525-4939.

  • MPN or Model

    NAS2854T4PT

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.370 inches
  • Fastener Length
    0.544 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.3902 inches and 0.3988 inches
  • Head Height
    0.076 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Titanium alloy
  • Material Specification
    Ams4971 assn standard single material response
  • Surface Treatment
    Aluminum
  • Surface Treatment Specification
    Nas4006 assn standard single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas2854 professional/industrial association standard
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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 5305015254939

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS2854T4PT National Aerospace Standards
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