G-931-2.50IN

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-437-8956

Item Name Code

05487

Assigment Date

10/25/1996 (29 years ago)

A flexible, tubular item of light wall construction. It must have single or multiple layers of nonmetallic material, but may contain metal wire reinforcement, foil type liner, and/or woven or braided cover. It is designed to convey under low pressure gaseous material, such as air and fumes, and light weight solid materials, such as dust, powders, and fibers. For items with couplings, see hose assembly, air duct. For items of sleeve section design rated for high pressure use, see sleeve, seal, coupling. Excludes:hose, nonmetallic.

strategic sealift conversion ships class end item identification, round with holes all ends flange shape, 4 all ends bolt hole quantity, disk flow control device, automatic valve operation method

Product Characteristics

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

Flow Control Device: disk
Bolt Hole Quantity: 4 all ends
End Item Identification: strategic sealift conversion ships class
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: horizontal
Valve Size: 2.500 inches
Nominal Outside Diameter: 7.000 inches all ends
Face To Face Distance: 8.500 inches
Nominal Thickness: 0.688 inches all ends
Bolt Hole Nominal Diameter: 0.750 inches all ends
Bolt Circle Nominal Diameter: 5.500 inches all ends
Flange Face Design: plain all ends
Special Features: swing check valve
Material: copper alloy flow control device
Material: copper alloy seat
Material: iron cast body
Style Designator: straight thru flanged ends
Specification/Standard Data: 59646-mss-sp-71 manufacturers standard
Nondefinitive Spec/Std Data: 1 type

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
G-931-2.50IN	Check Valve
MSS-SP-71	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-437-8956?

The FSCG of the NSN 4820-01-437-8956 is 4820

Does the NSN 4820-01-437-8956 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302010

Does NSN 4820-01-437-8956 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 4820-01-437-8956 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-437-8956 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 4820-01-437-8956 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Fri, Oct 25, 1996