1B7989

View detailed technical data, stock status, and sourcing information for: 1B7989
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-932-4806

Item Name Code

60396

Assigment Date

02/15/1967 (59 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.

0.027 inches nominal material thickness, 0.180 inches nominal hole diameter, 2.570 inches nominal bolt circle diameter, 2.875 inches nominal outside diameter, 0.062 inches nominal center hole 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: 0.180 inches nominal
Outside Diameter: 2.875 inches nominal
Bolt Circle Diameter: 2.570 inches nominal
Material Thickness: 0.027 inches nominal
Center Hole Diameter: 0.062 inches nominal
Bolt Hole Quantity: 6
Special Features: center has a brass insert with steel backing plate
Material: copper alloy and rubber synthetic and steel
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
1B7989	Flat Valve Diaphragm
1B7989-T0022	Flat Valve Diaphragm

FAQs

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

What is the FSCG of the NSN 4820-00-932-4806?

The FSCG of the NSN 4820-00-932-4806 is 4820

Does the NSN 4820-00-932-4806 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-932-4806 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 4820-00-932-4806 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-932-4806 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 4820-00-932-4806 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Wed, Feb 15, 1967