640-1122

View detailed technical data, stock status, and sourcing information for: 640-1122
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-261-4122

Item Name Code

05487

Assigment Date

08/12/1987 (39 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

manual valve operation method, disk flow control device, flared (tube) all ends connection style, 3a all ends thread class, right-hand all ends thread direction

Product Characteristics

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

Thread Class: 3a all ends
Thread Direction: right-hand all ends
Flow Control Device: disk
Connection Style: flared (tube) all ends
Valve Operation Method: manual
Connection Type: threaded external tube all ends
Mounting Position: horizontal
Nominal Thread Size: 0.750 inches all ends
Seat Angle: 37.0 degrees all ends
Special Features: modified with restrictor hole size 0.040in.
Material: steel corrosion resisting body
Material: steel corrosion resisting seat
Style Designator: cross
Thread Series Designator: unf all ends

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
640-1122	Check Valve
640-1122-001	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-261-4122?

The FSCG of the NSN 4820-01-261-4122 is 4820

Does the NSN 4820-01-261-4122 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-261-4122 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 4820-01-261-4122 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-261-4122 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 4820-01-261-4122 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Wed, Aug 12, 1987