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NSN 5305-01-280-6740

High Torque Screw

About this product

O-ring floursilicone rubber per mil-r-6855 cl 1 gr 60.

Manufacturer part number HR243E3-13 for national stock number 5305012806740.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-280-6740.

  • MPN or Model

    HR243E3-13

  • 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
    Between 0.338 inches and 0.388 inches
  • Fastener Length
    Between 1.160 inches and 1.190 inches
  • Head Style
    Flat countersunk undercut
  • Head Diameter
    Between 0.339 inches and 0.381 inches
  • Head Height
    Between 0.439 inches and 0.459 inches
  • Grip Diameter
    Between 0.1890 inches and 0.1895 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.802 inches and 0.822 inches
  • Features Provided
    Sealing ring and cetyl alcohol lubricant
  • Thready Qty Per Inch (tpi)
    32
  • Min. Tensile Strength (psi)
    160000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Surface Finish
    32.0 microinches threads
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Iron alloy 660 fastener
  • Material Specification
    Ams 5731 assn standard single material response fastener
  • Surface Treatment
    Passivate fastener
  • Surface Treatment Specification
    Qq-p-35 federal specification single treatment response fastener
  • 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 5305012806740

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HR243E3-13 Hi-shear Corporation
HR243E3-13 Lisi Aerospace Canada Corp
GB510DY3E13 Northrop Grumman Systems Corporation
123463E3-13 Sps Technologies, Llc
HR243E3-13 Naval Inventory Control Point
HR243E3-13 Hi-shear Corporation
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