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2640-680X2 PIECE 53

View detailed technical data, stock status, and sourcing information for: 2640-680X2 PIECE 53

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2640-680X2 PIECE 53
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-01-189-8440
Item Name Code
16282
Assigment Date
09/20/1984 (41 years ago)

2.250 inches nominal fastener length, 1.140 inches minimum thread length, flat chamfer head style, right-hand thread direction, 3a thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class
3a
Thread Direction
right-hand
Thread Length
1.140 inches minimum
Fastener Length
2.250 inches nominal
Head Style
flat chamfer
Head Diameter
0.735 inches minimum and 0.750 inches maximum
Head Height
0.492 inches minimum and 0.500 inches maximum
Internal Drive Style
hexagon
Nominal Thread Diameter
0.500 inches
Width Across Flats
0.375 inches nominal
Thread Quantity Per Inch
13
Minimum Tensile Strength
170000 pounds per square inch
Hardness Rating
36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Minimum Yield Strength
150000 pounds per square inch
Material
steel overall
Thread Series Designator
unc

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number Name
2640-680X2 PIECE 53 Socket Head Cap Screw
845-2180772 Socket Head Cap Screw
G50556 Socket Head Cap Screw
SS845-2180772 PIECE 53 Socket Head Cap Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-01-189-8440?
The FSCG of the NSN 5305-01-189-8440 is 5305
Does the NSN 5305-01-189-8440 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-01-189-8440 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5305-01-189-8440 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-01-189-8440 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5305-01-189-8440 was assigned to the Federal Catalog?
It was assigned 41 years ago, on Thu, Sep 20, 1984

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