ASM2 B18.21.1

View detailed technical data, stock status, and sourcing information for: ASM2 B18.21.1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-685-3228

Item Name Code

14218

Assigment Date

01/01/1963 (63 years ago)

0.448 inches minimum and 0.464 inches maximum hole diameter, 0.032 inches minimum and 0.040 inches maximum material thickness, w/s:truck, heavy expanded mobility tactical (hemtt); m1a2 abrams tank, 2350-01-328-5964 (eaa cmbt85pk3); missile, advanced medium range air-to-air (amraam)/aim120a; support equipment, b-1 aircraft; aircraft, c-18a, ec-18b; helicopter landing system, lamps mk iii; smoke generator set, m157a2; radar set, an/pps-5b; armored security vehicle, model xm1117; tactical air opns module (an/tyq-(23)); mrap - m-atv end item identification, 40.0 rockwell c minimum and 50.0 rockwell c maximum hardness rating, 0.740 inches minimum and 0.789 inches maximum outside diameter

Product Characteristics

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

Hole Diameter: 0.448 inches minimum and 0.464 inches maximum
Outside Diameter: 0.740 inches minimum and 0.789 inches maximum
Material Thickness: 0.032 inches minimum and 0.040 inches maximum
End Item Identification: w/s:truck, heavy expanded mobility tactical (hemtt); m1a2 abrams tank, 2350-01-328-5964 (eaa cmbt85pk3); missile, advanced medium range air-to-air (amraam)/aim120a; support equipment, b-1 aircraft; aircraft, c-18a, ec-18b; helicopter landing system, lamps mk iii; smoke generator set, m157a2; radar set, an/pps-5b; armored security vehicle, model xm1117; tactical air opns module (an/tyq-(23)); mrap - m-atv
Hardness Rating: 40.0 rockwell c minimum and 50.0 rockwell c maximum
Material: steel comp 1060 or steel comp 1070 or steel comp 1078 or steel comp 1080 overall
Material Document And Classification: 66 fed std all material responses overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 3 fed spec single treatment response overall
Style Designator: flat internal teeth
Nondefinitive Spec/Std Data: 1 type and a grade and 1 style and 1 composition

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-013-1718	No Name Available	12/01/1979
5310-00-167-0723	No Name Available	09/01/1986
5310-00-450-5753	No Name Available	09/01/1983
5310-00-558-2715	No Name Available	02/01/1983
5310-01-407-1704	No Name Available	07/01/1998
5310-01-429-2426	No Name Available	01/01/1997

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
0717612	Lock Washer
12387269-43	Lock Washer
1824HX1	Lock Washer
4198000-21	Lock Washer
5310006853228	Lock Washer
5310PL0820170	Lock Washer
6E7	Lock Washer
AN936A716	Lock Washer
ASM2 B18.21.1	Lock Washer
AU29AR271	Lock Washer
MS35333-43	Lock Washer

FAQs

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

What is the FSCG of the NSN 5310-00-685-3228?

The FSCG of the NSN 5310-00-685-3228 is 5310

Does the NSN 5310-00-685-3228 have a Schedule B code assigned?

Yes, the Schedule B code is 7318210000

Does NSN 5310-00-685-3228 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 5310-00-685-3228 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-685-3228 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 5310-00-685-3228 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963