5305-01-557-5720

Find complete technical information, availability, and procurement data for: 5305-01-557-5720
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-557-5720

Item Name Code

18257

Assigment Date

10/25/2007 (18 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.

20.0 millimeters nominal thread length, hexagon head style, 7.5 millimeters nominal head height, 20.0 millimeters nominal fastener length, right-hand thread direction

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: 20.0 millimeters nominal
Fastener Length: 20.0 millimeters nominal
Head Style: hexagon
Head Height: 7.5 millimeters nominal
Width Between Flats: 18.00 millimeters nominal
End Item Identification: medium mine protected vehicle - mmpv
Nominal Thread Diameter: 12.0 millimeters
Thread Pitch In Millimeters: 1.8
External Thread Tolerance Class: 6g
Material: steel property class 8.8 overall
Material Document And Classification: iso 898-1 assn std single material response overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: iso 4042 assn std all treatment responses overall
Thread Series Designator: iso 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
ISO4017-M12X20-8.8-A2D	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-557-5720?

The FSCG of the NSN 5305-01-557-5720 is 5305

Does the NSN 5305-01-557-5720 have a Schedule B code assigned?

Yes, the Schedule B code is 8710000090

Does NSN 5305-01-557-5720 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 5305-01-557-5720 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-557-5720 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 5305-01-557-5720 was assigned to the Federal Catalog?

It was assigned 18 years ago, on Thu, Oct 25, 2007