4820-00-181-8958

Find complete technical information, availability, and procurement data for: 4820-00-181-8958
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-181-8958

Item Name Code

27565

Assigment Date

10/24/1970 (55 years ago)

straight thru body style, plain first end style designator, plain face flange first end connection type, 4.500 inches nominal first end flange outside diameter, water, fresh and water, salt media for which designed

Product Characteristics

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

First End Flange Outside Diameter: 4.500 inches nominal
Body Style: straight thru
Media For Which Designed: water, fresh and water, salt
First End Connection Type: plain face flange
First End Style Designator: plain
First End Flange Shape Style: round w/ bolt holes
First End Flange Thickness: 0.438 inches nominal
First End Bolt Hole Quantity: 4
First End Bolt Hole Diameter: 0.563 inches nominal
First End Bolt Circle Diameter: 3.375 inches nominal
Second End Relationship With First End: identical
Face To Face Distance: 7.938 inches nominal
Flow Control Device: diaphragm
End Connection Quantity: 2
Renewable Seat Ring Type: threaded
Outlet Pressure Range: +25.0 to 60.0 pounds per square inch
Regulation Type: automatic double stage
Valve Stem Design: single seat
Valve Loading Method: spring
Maximum Inlet Pressure Rating: 150.0 pounds per square inch
Filter: not included
Special Test Features: high-impact shock tests are required as directed in paragraphs 3.6 and 4.4.2.3 of mil-v-2042 in pack test above
Test Data Document: "81349-milv2042 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Nondefinitive Spec/Std Data: 2 type

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-287-2709	No Name Available	02/02/1972

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
4207-D27994	Fluid Pressure Regulating Valve
F1370	Fluid Pressure Regulating Valve
F137002HF1B	Fluid Pressure Regulating Valve
F13702FF1B	Fluid Pressure Regulating Valve

FAQs

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

What is the FSCG of the NSN 4820-00-181-8958?

The FSCG of the NSN 4820-00-181-8958 is 4820

Does the NSN 4820-00-181-8958 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809015

Does NSN 4820-00-181-8958 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 4820-00-181-8958 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-181-8958 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 4820-00-181-8958 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Sat, Oct 24, 1970