6643070 PIECE 53

View detailed technical data, stock status, and sourcing information for: 6643070 PIECE 53
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-240-7087

Item Name Code

16282

Assigment Date

09/18/1986 (39 years ago)

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

3a thread class, 0.920 inches minimum and 1.120 inches maximum thread length, flat chamfer head style, right-hand thread direction, 1.150 inches nominal fastener length

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: 0.920 inches minimum and 1.120 inches maximum
Fastener Length: 1.150 inches nominal
Head Style: flat chamfer
Head Diameter: 1.000 inches nominal
Head Height: 0.735 inches minimum and 0.765 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.750 inches
Width Across Flats: 0.562 inches nominal
Thread Quantity Per Inch: 10
Material: steel comp 4037 or steel comp 4140 or steel comp 4145 or steel comp 8735 or steel comp 8740 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
6643070 PIECE 53	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-240-7087?

The FSCG of the NSN 5305-01-240-7087 is 5305

Does the NSN 5305-01-240-7087 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-240-7087 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 5305-01-240-7087 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-240-7087 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 5305-01-240-7087 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Thu, Sep 18, 1986