Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-01-256-8744 FSC 4820
NSN 4820-01-256-8744 (also written 4820012568744; NIIN 01-256-8744) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 7 manufacturer part numbers from 5 suppliers are on record. It was last purchased in Aug 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)
R
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. 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 |
|---|---|
| FLOW CONTROL DEVICE ADQU | DISK |
| DISK LOADING METHOD ADSU | SPRING |
| VALVE DISCHARGE FLOW RATE ADSY | CUBIC FEET PER MINUTE 128.0 |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 400.0 |
| CRITICALITY CODE JUSTIFICATION CRTL | ZZZY |
| OPENING PRESSURE SETTING CSDC | POUNDS PER SQUARE INCH 80.0 |
| MATERIAL MATT | BODY COPPER ALLOY 922 |
| MATERIAL MATT | SEAT NICKEL ALLOY 400 |
| MATERIAL MATT | STEM NICKEL ALLOY 400 |
| MATERIAL MATT | FLOW CONTROL DEVICE NICKEL ALLOY 400 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | SEAT FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 QQ-N-281 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | BODY ASSN STD SINGLE MATERIAL RESPONSE AST- B61 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | FLOW CONTROL DEVICE FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 QQ-N-281 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | STEM FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 QQ-N-281 |
| MEDIA FOR WHICH DESIGNED MEDA | SINGLE RESPONSE OXYGEN, LIQUID |
| STYLE DESIGNATOR STYL | — |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS ZZZY | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 MIL-STD-1330 |
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 |
|---|---|---|
| 9955.K 5IM,TYPE | 96101 | GAS EQUIPMENT ENGINEERING CORPORATION, THE DBA GEECO |
| D841-4050 | 6UY05 | COLD LLC |
| D841-4050 | 96101 | GAS EQUIPMENT ENGINEERING CORPORATION, THE DBA GEECO |
| D841-4050CP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |
| UU-1551-T | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |
| UU-1551-T | 15187 | EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DIV NAVY PRODUCT TEAM |
| UU-1551-TCP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |
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
—
Aug 12, 2026
Last purchased
1 · 1.0/yr
Purchase records
$39,686
Total demand
$39,686
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 |
|---|---|---|---|---|
| Aug 12, 2026 | SPE7MC26V3920 ↗ | COLD LLC | — | $39,686 |
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
COLD LLC
last award Aug 2026
ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
no award yet
no awards on record
Listed source EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DIV NAVY PRODUCT TEAM
no award yet
no awards on record
Listed source GAS EQUIPMENT ENGINEERING CORPORATION, THE DBA GEECO
no award yet
no awards on record
Listed source NAVAL INVENTORY CONTROL POINT MECHANICSBURG
no award yet
no awards on record
Listed source COLD LLC won the only award on record.
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 Nov 4, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-11-04.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-256-8744/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-256-8744/