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NSN 5305-01-597-4549

High Torque Screw

About this product

Between 0.473 inches and 0.503 inches fastener length, flat countersunk head style, 0.257 inches head diameter, grip diameter: 0.188 inches .

Manufacturer part number NAS1581K3H2 for national stock number 5305015974549.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-597-4549.

  • MPN or Model

    NAS1581K3H2

  • Schedule B
    8108.90.8000 (Other wrought titanium, nesoi)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.363 inches
  • Fastener Length
    Between 0.473 inches and 0.503 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    0.257 inches
  • Grip Diameter
    0.188 inches
  • Internal Drive Style
    Recessed type i
  • Thread Diameter
    0.190 inches
  • Grip Length
    0.125 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Titanium alloy uns r56400
  • Material Specification
    Ams 4928 national std/spec single material response or ams 4967 national std/spec single material response
  • Thread Series Designator
    Unf
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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 5305015974549

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1581K3H2 National Aerospace Standards
NAS1581K3H2 National Aerospace Standards
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