Acquisition method (AMC)
1
FSC 4820 × SEAT,VALVE
SEAT,VALVE
4820-01-449-1979 FSC 4820
NSN 4820-01-449-1979 (also written 4820014491979; NIIN 01-449-1979) is a seat, valve in Federal Supply Class 4820, Valves, Nonpowered. 4 manufacturer part numbers from 2 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 as suitable for competitive acquisition (AMC 1).
Suffix (AMSC)
G
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC G: the government has a complete data package and the rights to use it. 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 |
|---|---|
| THREAD CLASS AAJD | 3A |
| THREAD LENGTH AASA | SINGLE THREADED PORTION INCHES NOMINAL 0.266 |
| OVERALL HEIGHT ABKW | INCHES NOMINAL 0.375 |
| BODY INSIDE DIAMETER ADAS | INCHES NOMINAL 1.318 |
| END ITEM IDENTIFICATION AGAV | NIMITZ CLASS CVN |
| THREAD QUANTITY PER INCH CMLP | 20 |
| NOMINAL THREAD SIZE CQJX | SINGLE THREADED PORTION INCHES 1.8125 |
| SEATING SURFACE SHAPE CQKM | FLAT |
| MATERIAL MATT | OVERALL NICKEL ALLOY |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL ASSN STD SINGLE MATERIAL RESPONSE AST- B164 OR ASSN STD SINGLE MATERIAL RESPONSE AST- A494 GR -30C OR FED SPEC SINGLE MATERIAL RESPONSE QQ-N-281 QQ-N-281 |
| STYLE DESIGNATOR STYL | — |
| THREAD SERIES DESIGNATOR THSD | SINGLE THREADED PORTION UN |
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 |
|---|---|---|
| 4384536 | 80064 | NAVAL SHIP SYSTEMS COMMAND |
| 4820PL1283137 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX |
| 803-4384536 PC 85 | 80064 | NAVAL SHIP SYSTEMS COMMAND |
| 803-4384536-61XX-85 | 80064 | NAVAL SHIP SYSTEMS COMMAND |
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 27, 2026
Last purchased
1 · 1.0/yr
Purchase records
$2,026
Total demand
$2,026
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 27, 2026 | SPE7M126P6043 ↗ | BEC SYSTEMS LLC DBA BEC MACHINE PRODUCTS | — | $2,026 |
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
BEC SYSTEMS LLC DBA BEC MACHINE PRODUCTS
last award Aug 2026
JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX
no award yet
no awards on record
Listed source NAVAL SHIP SYSTEMS COMMAND
no award yet
no awards on record
Listed source BEC SYSTEMS LLC DBA BEC MACHINE PRODUCTS won the only award on record. BEC SYSTEMS LLC DBA BEC MACHINE PRODUCTS 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 28, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-10-28.
- Full methodology →
Cite this page
Citation
NSN Explorer. "SEAT,VALVE." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-449-1979/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-449-1979/