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NSN 5305-01-323-4155

High Torque Screw

About this product

Between 1.690 inches and 1.720 inches fastener length, flat countersunk head style, between 0.3504 inches and 0.3988 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number HR218-4-21D for national stock number 5305013234155.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-323-4155.

  • MPN or Model

    HR218-4-21D

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.403 inches
  • Fastener Length
    Between 1.690 inches and 1.720 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.3504 inches and 0.3988 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches first hole and 0.086 inches first hole
  • Internal Drive Style
    Torque-set ribbed
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.292 inches and 1.312 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
    1.564 inches first hole and 1.614 inches first hole
  • Surface Finish
    32.0 microinches threads
  • Material
    Steel comp e4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416 type 2, cl 2 federal specification single treatment response
  • 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 5305013234155

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HR218-4-21D Hi-shear Corporation
HR218-4-21D Lisi Aerospace Canada Corp
GB510DC4-21D Northrop Grumman Systems Corporation
SCT1826-4-21D Arconic Global Fasteners & Rings,
PBF1357A4-D21 Sps Technologies, Llc
129968A-4-D21 Sps Technologies, Llc
GB510DC4-21D Aero Mechanical Fastening Systems
AMS504A4D21 Aero Mechanical Fastening Systems
GB510DC4-21D Abounding Security Inc
MATS111AD4-21 Abounding Security Inc
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