C1951

View detailed technical data, stock status, and sourcing information for: C1951
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-306-1213

Item Name Code

60396

Assigment Date

01/01/1961 (65 years ago)

A deformable material which prevents the passage of matter through the joint formed when two faces are joined. It may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. It may be made to any predetermined dimension and shape. Excludes:flat disks, items made of felt material and items having joints. For round metal and plastic items with an aperture and a solid rectangular cross section, see washer, flat; shim; bearing, washer, thrust; and spacer ring. Excludes:disk, valve; seal, nonmetallic angle; seal, nonmetallic channel; seal, nonmetallic special shaped section; shielding gasket, electronic; and ring, sealing jar.

0.312 inches nominal hole diameter, 5.219 inches nominal outside diameter, 4.719 inches nominal bolt circle diameter, 0.438 inches nominal center hole diameter, 0.050 inches nominal material thickness

Product Characteristics

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

Hole Diameter: 0.312 inches nominal
Outside Diameter: 5.219 inches nominal
Bolt Circle Diameter: 4.719 inches nominal
Material Thickness: 0.050 inches nominal
Center Hole Diameter: 0.438 inches nominal
Bolt Hole Quantity: 8
Material: rubber synthetic and plastic polyamide (nylon)
Style Designator: flat

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
4820PL1244505	Flat Valve Diaphragm
C1951	Flat Valve Diaphragm
C1951H	Flat Valve Diaphragm

FAQs

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

What is the FSCG of the NSN 4820-00-306-1213?

The FSCG of the NSN 4820-00-306-1213 is 4820

Does the NSN 4820-00-306-1213 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-306-1213 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 4820-00-306-1213 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-306-1213 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 4820-00-306-1213 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961