BACS21X4W

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5325 Fastening Devices

National Stock Number

5325-00-489-0931

Item Name Code

18484

Assigment Date

01/01/1963 (63 years ago)

0.850 inches minimum and 0.890 inches maximum head length, flat countersunk wing turnlock stud head style, 0.513 inches minimum and 0.528 inches maximum distance from engaging member to largest bearing surface of head, stud assembly stud assembly style, 0.341 inches minimum and 0.348 inches maximum eyelet outside diameter

Product Characteristics

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

Head Length: 0.850 inches minimum and 0.890 inches maximum
Turnlock Stud Head Style: flat countersunk wing
Stud Assembly Style: stud assembly
Distance From Engaging Member To Largest Bearing Surface Of Head: 0.513 inches minimum and 0.528 inches maximum
Eyelet Outside Diameter: 0.341 inches minimum and 0.348 inches maximum
Eyelet Length: 0.257 inches nominal
Material Accommodated Thickness: 0.141 inches minimum and 0.170 inches maximum
Material: steel comp 1009 or steel comp 1050 or steel comp 1112 eyelet
Material: steel comp 1009 head
Material: steel comp 4037 stud
Material: steel ejector spring
Material: steel pin
Material Document And Classification: qq-w-470 fed spec single material response ejector spring
Material Document And Classification: qq-w-470 fed spec single material response pin
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 2 fed spec all treatment responses overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5325-00-822-3865	No Name Available	01/01/1960

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
4002-4W	Turnlock Fastener Stud Assembly
8804136	Turnlock Fastener Stud Assembly
944.48.77.919	Turnlock Fastener Stud Assembly
BACS21ED4W	Turnlock Fastener Stud Assembly
BACS21X4W	Turnlock Fastener Stud Assembly

FAQs

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

What is the FSCG of the NSN 5325-00-489-0931?

The FSCG of the NSN 5325-00-489-0931 is 5325

Does the NSN 5325-00-489-0931 have a Schedule B code assigned?

Yes, the Schedule B code is 9607190000

Does NSN 5325-00-489-0931 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 5325-00-489-0931 contain precious materials?

Precious metal content is unknown

Does NSN 5325-00-489-0931 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 5325-00-489-0931 was assigned to the Federal Catalog?

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