RD-5-4628-1-.625M

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-172-2543

Item Name Code

18257

Assigment Date

02/18/1984 (42 years ago)

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

0.495 inches minimum and 0.625 inches maximum thread length, right-hand thread direction, 2a thread class, 0.595 inches minimum and 0.625 inches maximum fastener length, hexagon head style

Product Characteristics

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

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.495 inches minimum and 0.625 inches maximum
Fastener Length: 0.595 inches minimum and 0.625 inches maximum
Head Style: hexagon
Head Height: 0.150 inches minimum and 0.163 inches maximum
Width Between Flats: 0.428 inches minimum and 0.438 inches maximum
End Item Identification: mrap - common nsn - used on 2 mrap variants and 5 other weapon systems; mrap buffalo mk2a2; mrap - m-atv
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Special Features: color black
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
9HE965	Hexagon Head Cap Screw
RD-5-4628-1-.625	Hexagon Head Cap Screw
RD-5-4628-1-.625M	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-172-2543?

The FSCG of the NSN 5305-01-172-2543 is 5305

Does the NSN 5305-01-172-2543 have a Schedule B code assigned?

Yes, the Schedule B code is 8710000090

Does NSN 5305-01-172-2543 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 5305-01-172-2543 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-172-2543 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 5305-01-172-2543 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Sat, Feb 18, 1984