Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-01-273-3643 FSC 4820
NSN 4820-01-273-3643 (also written 4820012733643; NIIN 01-273-3643) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 2 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Oct 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 |
| BOLT HOLE QUANTITY AECS | 4 |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| FLANGE SHAPE ARKN | ALL ENDS ROUND WITH HOLES |
| CONNECTION TYPE AWLS | ALL ENDS FLANGE |
| VALVE SIZE CCFG | INCHES 0.500 |
| ADJUSTABLE PRESSURE RANGE CQCY | POUNDS PER SQUARE INCH 48.0 TO 59.0 |
| NOMINAL OUTSIDE DIAMETER CWCD | ALL ENDS INCHES 3.500 |
| FACE TO FACE DISTANCE CWCF | INCHES 1.750 |
| NOMINAL THICKNESS CWCK | ALL ENDS INCHES 0.437 |
| BOLT HOLE NOMINAL DIAMETER CWCQ | ALL ENDS INCHES 0.625 |
| BOLT CIRCLE NOMINAL DIAMETER CWCT | ALL ENDS INCHES 2.375 |
| FLANGE FACE DESIGN CWDF | ALL ENDS RAISED STRAIGHT |
| RAISED FACE NOMINAL HEIGHT CWDH | ALL ENDS INCHES 0.062 |
| RAISED FACE NOMINAL DIAMETER CWDL | ALL ENDS INCHES 1.375 |
| MATERIAL MATT | SEAT STEEL CORROSION RESISTING |
| MATERIAL MATT | BODY STEEL |
| MATERIAL MATT | STEM STEEL CORROSION RESISTING |
| MATERIAL MATT | FLOW CONTROL DEVICE STEEL CORROSION RESISTING |
| 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 |
|---|---|---|
| R10AD5D511-CS1 AND D50748 | 11859 | HUNT VALVE COMPANY, INC. |
| R10AD5D511-CS1 AND D50748 | 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
$74,903.08
Purchases
1
Total spend
$224,709
Oct 19, 2026
Last purchased
2 · 2.0/yr
Purchase records
$449,418
Total demand
$74,903.08
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Oct 19, 2026 | 3 | $74,903.08 | $224,709 | CHAND, L.L.C. (0D5X4) | Unknown | Source ↗ |
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 |
|---|---|---|---|---|
| Oct 19, 2026 | SPE7MC27V0248 ↗ | CHAND, L.L.C. | — | $224,709 |
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.
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 Oct 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.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7MC-27-T-0219 | Oct 8, 2026 | Oct 19, 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.
- Data last refreshed: 2026-10-20.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-273-3643/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-273-3643/