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NSN 5305-01-246-1809

High Torque Screw

About this product

Internal drive ribbed.

Manufacturer part number HR204-4-27 for national stock number 5305012461809.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-246-1809.

  • MPN or Model

    HR204-4-27

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.386 inches and 0.453 inches
  • Fastener Length
    Between 2.084 inches and 2.131 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
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 1.678 inches and 1.698 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    220000 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
    Steel comp h11
  • Material Specification
    Ams6487 assn standard single material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416, type 2, class 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 5305012461809

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HR204-4-27 Hi-shear Corporation
HR204-4-27 Lisi Aerospace Canada Corp
PBF1202-4-27 Sps Technologies, Llc
GB510CE4-27 Northrop Grumman Systems Corporation
HR204-4-27 Naval Inventory Control Point
HR204-4-27 Hi-shear Corporation
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