21C439-020

View detailed technical data, stock status, and sourcing information for: 21C439-020
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5342 Weapon System Hardware

National Stock Number

5342-00-931-8564

Item Name Code

20319

Assigment Date

09/25/1966 (59 years ago)

single latch style, 40.0 included angle in deg, 19.250 inches nominal inside diameter, grooved retainer cross-sectional shape style, 0.032 inches nominal retainer thickness

Product Characteristics

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

Cross-Sectional Shape Style: grooved retainer
Inside Diameter: 19.250 inches nominal
Retainer Thickness: 0.032 inches nominal
Latch Style: single
Included Angle In Deg: 40.0
Nut Type: self-locking hexagon
Segment Quantity: 4
Sealing Inner Liner: not included
Retainer Width: 0.500 inches nominal
Root Width: 0.156 inches nominal
Band Thickness: 0.025 inches nominal
Band Width: 0.625 inches nominal
Height: 0.218 inches nominal
Material: steel corrosion resisting overall
Surface Treatment: passivate overall
Shape: round

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
21C439-020	Grooved Clamp Coupling
4270-1925S	Grooved Clamp Coupling

FAQs

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

What is the FSCG of the NSN 5342-00-931-8564?

The FSCG of the NSN 5342-00-931-8564 is 5342

Does the NSN 5342-00-931-8564 have a Schedule B code assigned?

Yes, the Schedule B code is 9803200000

Does NSN 5342-00-931-8564 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 5342-00-931-8564 contain precious materials?

Precious metal content is unknown

Does NSN 5342-00-931-8564 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 5342-00-931-8564 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Sun, Sep 25, 1966