B18231B06035N

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-505-3353

Item Name Code

18257

Assigment Date

03/04/2003 (23 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.

18.0 millimeters nominal thread length, right-hand thread direction, 34.6 millimeters minimum and 35.4 millimeters maximum fastener length, hexagon head style, 3.85 millimeters minimum and 4.15 millimeters maximum head height

Product Characteristics

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

Thread Direction: right-hand
Thread Length: 18.0 millimeters nominal
Fastener Length: 34.6 millimeters minimum and 35.4 millimeters maximum
Head Style: hexagon
Head Height: 3.85 millimeters minimum and 4.15 millimeters maximum
Width Between Flats: 9.78 millimeters minimum and 10.00 millimeters maximum
End Item Identification: interim armored vehicle (iav),contractor logistics support (cls)
Nominal Thread Diameter: 6.0 millimeters
Thread Pitch In Millimeters: 1.0
External Thread Tolerance Class: 6g
Material: steel overall
Surface Treatment: zinc overall
Surface Treatment Document And Classification: qq-z-325,ty 2,cl 3 fed spec single treatment response overall
Thread Series Designator: m

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
12485434-079	Hexagon Head Cap Screw
B18231B06035N	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-505-3353?

The FSCG of the NSN 5305-01-505-3353 is 5305

Does the NSN 5305-01-505-3353 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-505-3353 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 5305-01-505-3353 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-505-3353 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 5305-01-505-3353 was assigned to the Federal Catalog?

It was assigned 23 years ago, on Tue, Mar 4, 2003