FSC 4820 × VALVE,SAFETY RELIEF

VALVE,SAFETY RELIEF

4820-01-442-2081 FSC 4820

NSN 4820-01-442-2081 (also written 4820014422081; NIIN 01-442-2081) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 5 manufacturer part numbers from 3 suppliers are on record. No purchases are on record yet.

Open for bid

No open solicitations on record for this NSN right now.

Search open RFQs on DIBBS →

Can you win it?

This item is coded as suitable for competitive acquisition (AMC 1).

Acquisition method (AMC)

Suffix (AMSC)

Competition

Coded for competition

AMC 1: suitable for competitive acquisition, second or later time. AMSC P: the government does not own the rights to the data needed for more sources. The codes describe the item's status on record, not any one solicitation. What the codes mean

What it is — can you make it?

Dimensions, the FLIS specification requirements, and the manufacturer part numbers already qualified against this NSN.

Specifications

From the federal catalog (DLA FLIS / PUB LOG) — what your part has to meet. Cited specification documents can be looked up in ASSIST Quick Search ↗, DoD's public spec repository — copy the document number in.

Requirement	Value
NOMINAL PIPE SIZE ACCOMMODATED AAAR	ALL ENDS INCHES 0.250
FLOW CONTROL DEVICE ADQU	DISK
DISK LOADING METHOD ADSU	SPRING
MAXIMUM OPERATING TEMP AEHZ	SINGLE RESPONSE FAHRENHEIT 150.0
END ITEM IDENTIFICATION AGAV	WASP CLASS LHD
CONNECTION STYLE AHNC	—
VALVE OPERATION METHOD AQLR	AUTOMATIC
CONNECTION TYPE AWLS	ALL ENDS UNTHREADED INTERNAL PIPE
OPERATING PRESSURE CQQF	SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 3450.0
OPENING PRESSURE SETTING CSDC	POUNDS PER SQUARE INCH 3300.0
MATERIAL MATT	BODY NICKEL ALLOY
MATERIAL MATT	SEAT NICKEL ALLOY
MATERIAL MATT	FLOW CONTROL DEVICE NICKEL ALLOY
MATERIAL MATT	STEM NICKEL ALLOY
MATERIAL DOCUMENT AND CLASSIFICATION MDCL	FLOW CONTROL DEVICE ASSN STD SINGLE MATERIAL RESPONSE AST- B164
MATERIAL DOCUMENT AND CLASSIFICATION MDCL	STEM ASSN STD SINGLE MATERIAL RESPONSE AST- B164
MATERIAL DOCUMENT AND CLASSIFICATION MDCL	SEAT ASSN STD SINGLE MATERIAL RESPONSE AST- B164
MATERIAL DOCUMENT AND CLASSIFICATION MDCL	BODY ASSN STD SINGLE MATERIAL RESPONSE AST- A494
STYLE DESIGNATOR STYL	—

Manufacturer part numbers

Commercial part numbers cross-referenced to this NSN in the federal catalog — the parts that have been accepted as satisfying this stock number, and who makes them.

Part number	CAGE	Manufacturer
20391	01343	ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
20391 ASSY 20391-01-3-3300	01343	ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
20391-01-E-3300	01343	ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
20391-01-E-3300	15187	EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DIV NAVY PRODUCT TEAM
2039101E3300	79343	ASRC FEDERAL FACILITIES LOGISTICS, LLC

What it pays — so you can quote

The government's own price and demand record for this NSN — what past awards cleared at, so you know where to land your quote.

Latest unit price

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Purchases

Total spend

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Last purchased

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Purchase records

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Total demand

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Latest award total

Compare with other items

Purchase history

No priced purchases on record for this NSN yet.

Related contract actions

Contract action totals, not unit prices — obligation amounts from USAspending for related awards, shown for context only. These do not appear on the price chart above.

No related contract actions on record.

Demand history

Every solicitation we've indexed for this NSN, open and closed — 1 on record. Closed RFQs (expired, cancelled, or awarded) stay here as a record of past demand; they never get removed.

Solicitation	Issued	Closes / closed	Qty	Status
SPE7MC-26-T-285G	Sep 18, 2026	Sep 28, 2026	3	Expired	View at DIBBS →

Open RFQs on DIBBS → DIBBS award history ↗

About this data

Unit prices: DLA DIBBS award records — every row links to its government record.
AMSC: latest observed value from DIBBS solicitation history as of Oct 10, 2026.
Contract action totals: USAspending, context only.
Full methodology →

Cite this page

Citation

NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-442-2081/. Data as of October 19, 2026.

Link

https://nsnexplorer.com/nsn/4820-01-442-2081/