NSN 5305-01-280-6741
High Torque Screw
Between 1.286 inches and 1.316 inches fastener length, flat countersunk undercut head style, between 0.339 inches and 0.381 inches head diameter, head height: between 0.044 inches and 0.046 inches .
Manufacturer part number HR243E3-15 for national stock number 5305012806741.
Datasheet
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Product description
Close Tolerance Screw NSN 5305-01-280-6741.
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MPN or Model
HR243E3-15
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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 1.286 inches and 1.316 inches -
Head Style
Flat countersunk undercut -
Head Diameter
Between 0.339 inches and 0.381 inches -
Head Height
Between 0.044 inches and 0.046 inches -
Grip Diameter
Between 0.1890 inches and 0.1895 inches -
Internal Drive Style
Torque-set ribbed -
Thread Diameter
0.190 inches -
Grip Length
Between 0.928 inches and 0.948 inches -
Features Provided
O 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
Steel comp 8740 fastener -
Material Specification
Mil-r-6855, class 1 military specification single material response ring -
Surface Treatment
Cadmium fastener and chromate fastener -
Surface Treatment Specification
Qq-p-416, type 2 class 2 federal specification single treatment response fastener -
Thread Series Designator
Unjf
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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](/public/images/billy-thinking.png)
Pricing and Availability
Get a quote for 5305-01-280-6741 close tolerance screwManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
---|---|
HR243E3-15 | Hi-shear Corporation |
HR243E3-15 | Lisi Aerospace Canada Corp |
GB510DY3S15 | Northrop Grumman Systems Corporation |
123463S3-15 | Sps Technologies, Llc |
HR243E3-15 | Naval Inventory Control Point |
HR243E3-15 | Hi-shear Corporation |
Stock Check
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