Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-01-418-4081 FSC 4820
NSN 4820-01-418-4081 (also written 4820014184081; NIIN 01-418-4081) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.
Open for bid
No open solicitations on record for this NSN right now.
Can you win it?
This item is coded to be bought directly from the actual manufacturer (AMC 3).
Suffix (AMSC)
C
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC C: needs engineering source approval; other sources must qualify first. 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 |
|---|---|
| DISK LOADING METHOD ADSU | SPRING |
| END ITEM IDENTIFICATION AGAV | WASP CLASS LHD |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| ADJUSTABLE PRESSURE RANGE CQCY | POUNDS PER SQUARE INCH 59.0 TO 72.0 |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 400.0 |
| MATERIAL MATT | BODY COPPER ALLOY 922 |
| MATERIAL MATT | SEAT NICKEL ALLOY |
| MATERIAL MATT | FLOW CONTROL DEVICE NICKEL ALLOY AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| MATERIAL MATT | STEM NICKEL ALLOY |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | BODY ASSN STD SINGLE MATERIAL RESPONSE AST- B61 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | SEAT FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 QQ-N-281 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | FLOW CONTROL DEVICE FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 AND ASSN STD SINGLE MATERIAL RESPONSE AST- BG-710 QQ-N-281 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | STEM FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 QQ-N-281 |
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 |
|---|---|---|
| D49501 | 34889 | HUNT VALVE COMPANY INC DBA UNION FLONETICS |
| R10AH1H112-BM3 AND D49501 | 11859 | HUNT VALVE COMPANY, INC. |
| R10AH1H112-BM3 AND D49501 | 34889 | HUNT VALVE COMPANY INC DBA UNION FLONETICS |
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
—
Purchases
0
Total spend
—
Sep 3, 2026
Last purchased
1 · 1.0/yr
Purchase records
$213,839
Total demand
$213,839
Latest award total
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.
| Action date | Award # | Recipient | Agency | Obligation |
|---|---|---|---|---|
| Sep 3, 2026 | SPE7MC26V4298 ↗ | CHAND, L.L.C. | — | $213,839 |
Demand history
Who wins this item
Does one supplier win this every time, and are the winners on the listed-source list? One dot per award.
- Award in the last 2 years
- Older award
CHAND, L.L.C.
last award Sep 2026
HUNT VALVE COMPANY INC DBA UNION FLONETICS
no award yet
no awards on record
Listed source HUNT VALVE COMPANY, INC.
no award yet
no awards on record
Listed source CHAND, L.L.C. won the only award on record. CHAND, L.L.C. won without being a listed source.
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 27, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-10-25.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-418-4081/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-418-4081/