Acquisition method (AMC)
3
FSC 4820 × SEAT,VALVE
SEAT,VALVE
4820-00-956-1477 FSC 4820
NSN 4820-00-956-1477 (also written 4820009561477; NIIN 00-956-1477) is a seat, valve in Federal Supply Class 4820, Valves, Nonpowered. 6 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)
P
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, 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 |
|---|---|
| BODY OUTSIDE DIAMETER ADAR | INCHES MINIMUM 2.315 AND INCHES MAXIMUM 2.320 |
| BODY INSIDE DIAMETER ADAS | INCHES MINIMUM 1.374 AND INCHES MAXIMUM 1.375 |
| UNDER FLANGE HEIGHT AJRM | INCHES MINIMUM 0.183 AND INCHES MAXIMUM 0.186 |
| SEATING SURFACE SHAPE CQKM | FLAT |
| MATERIAL MATT | BODY STEEL |
| MATERIAL MATT | FACE COBALT ALLOY |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | BODY FED SPEC SINGLE MATERIAL RESPONSE QQ-S-763,CLASS 410 QQ-S-763 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | FACE MIL SPEC SINGLE MATERIAL RESPONSE -IL-R-17131,TYE -IL-RCOCR-A |
| STYLE DESIGNATOR STYL | — |
| FLANGE SEAT TO DISK END HEIGHT AJRF | INCHES MINIMUM 0.752 AND INCHES MAXIMUM 0.755 |
| FLANGE DIAMETER ABKK | INCHES MINIMUM 2.805 AND INCHES MAXIMUM 2.810 |
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 |
|---|---|---|
| 591-607 | 27235 | HARDIE-TYNES CO., INC. |
| 591-607 | 9E328 | STEWARD MACHINE CO INC |
| 60-591PC607 | 27235 | HARDIE-TYNES CO., INC. |
| 60-591PC607 | 9E328 | STEWARD MACHINE CO INC |
| 60-773PC607 | 27235 | HARDIE-TYNES CO., INC. |
| 60-773PC607 | 9E328 | STEWARD MACHINE CO INC |
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
$1,395.00
Purchases
1
Total spend
$20,925
Oct 6, 2026
Last purchased
3 · 3.0/yr
Purchase records
$53,379
Total demand
$1,395.00
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Oct 6, 2026 | 15 | $1,395.00 | $20,925 | STEWARD MACHINE CO INC (9E328) | 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 |
|---|---|---|---|---|
| Sep 8, 2026 | SPE7MC26P3554 ↗ | STEWARD MACHINE CO INC | — | $11,529 |
| Oct 6, 2026 | SPE7M227V0116 ↗ | STEWARD MACHINE CO INC | — | $20,925 |
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
STEWARD MACHINE CO INC
last award Oct 2026
HARDIE-TYNES CO., INC.
no award yet
no awards on record
Listed source STEWARD MACHINE CO INC won the only award on record.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7MC-26-T-221T | Aug 25, 2026 | Sep 4, 2026 | 15 | 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: 2026-10-24.
- Full methodology →
Cite this page
Citation
NSN Explorer. "SEAT,VALVE." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-00-956-1477/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-00-956-1477/