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NSN 5305-01-066-5310

High Torque Screw

About this product

0.897 inches fastener length, flat countersunk head style, between 0.497 inches and 0.507 inches head diameter, grip diameter: between 0.2641 inches and 0.2651 inches .

Manufacturer part number 66908H4-8 for national stock number 5305010665310.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-066-5310.

  • MPN or Model

    66908H4-8

  • 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
    0.397 inches
  • Fastener Length
    0.897 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.497 inches and 0.507 inches
  • Grip Diameter
    Between 0.2641 inches and 0.2651 inches
  • Single Shear Strength
    132000 pounds per square inch
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    0.500 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    220000 pounds per square inch
  • Hardness Rating
    46.0 rockwell c and 50.0 rockwell c
  • Countersink Angle
    100.0 degrees
  • Material
    Steel
  • Material Specification
    Ams 6487 assn standard single material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Mac ps-13145 fscm 76301 mfr ref all treatment responses
  • 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 5305010665310

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
66908H4-8 Sps Technologies, Llc
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