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NSN 5305-01-395-8750

High Torque Screw

About this product

Between 2.036 inches and 2.066 inches fastener length, flat countersunk head style, between 0.464 inches and 0.507 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number NAS1580A4T27D for national stock number 5305013958750.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-395-8750.

  • MPN or Model

    NAS1580A4T27D

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.403 inches
  • Fastener Length
    Between 2.036 inches and 2.066 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.464 inches and 0.507 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches grip and 0.086 inches grip
  • Internal Drive Style
    Cross recess type iii
  • 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
  • Hardness Rating
    36.0 rockwell c and 40.0 rockwell c
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    1.910 inches grip and 1.960 inches grip
  • Material
    Steel comp 4140 and steel comp 4340 and steel comp 8740
  • Surface Treatment
    Cadmium and chromate
  • Thread Series Designator
    Unf
  • Specification Data
    80205-nas1580 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 5305013958750

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1580A4T27D National Aerospace Standards
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