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NSN 5305-01-128-2930

High Torque Screw

About this product

Between 0.638 inches and 0.668 inches fastener length, pan no. 2 head style, between 0.477 inches and 0.492 inches head diameter, head height: between 0.140 inches and 0.150 inches .

Manufacturer part number NAS1578V4H4 for national stock number 5305011282930.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-128-2930.

  • MPN or Model

    NAS1578V4H4

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • NMF (National Motor Freight)
    136500 - Metal NOI/metal Alloys NOI
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.378 inches and 0.428 inches
  • Fastener Length
    Between 0.638 inches and 0.668 inches
  • Head Style
    Pan no. 2
  • Head Diameter
    Between 0.477 inches and 0.492 inches
  • Head Height
    Between 0.140 inches and 0.150 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Surface Finish
    32.0 microinches threads
  • Material
    Titanium alloy
  • Material Specification
    Nas621 assn standard single material response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas1578 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 5305011282930

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1578V4H4 National Aerospace Standards
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