Acquisition method (AMC)
1
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-00-528-2835 FSC 4820
NSN 4820-00-528-2835 (also written 4820005282835; NIIN 00-528-2835) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 3 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 as suitable for competitive acquisition (AMC 1).
Suffix (AMSC)
C
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, 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 |
|---|---|
| STYLE DESIGNATOR STYL | — |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 975.0 |
| OPENING PRESSURE SETTING CSDC | POUNDS PER SQUARE INCH 975.0 |
| NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED CWFD | ALL ENDS INCHES 0.375 |
| SPECIAL FEATURES FEAT | REVERSE FLOW |
| MATERIAL MATT | BODY ALUMINUM ALLOY |
| NOMINAL THREAD SIZE CQJX | ALL ENDS INCHES 0.562 |
| THREAD CLASS AAJD | 3B |
| BONNET TYPE ADSR | INSIDE SCREW |
| THREAD SERIES DESIGNATOR THSD | ALL ENDS UNF |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| MATERIAL MATT | STEM STEEL CORROSION RESISTING |
| THREAD DIRECTION AAJF | ALL ENDS RIGHT-HAND |
| FLOW CONTROL DEVICE ADQU | DISK |
| CONNECTION TYPE AWLS | ALL ENDS THREADED INTERNAL BOSS |
| MATERIAL MATT | FLOW CONTROL DEVICE STEEL CORROSION RESISTING |
| MATERIAL MATT | SEAT STEEL CORROSION RESISTING |
| DISK LOADING METHOD ADSU | SPRING |
| VALVE DISCHARGE FLOW RATE ADSY | GALLONS PER MINUTE 7.0 |
| MAXIMUM OPERATING TEMP AEHZ | SINGLE RESPONSE FAHRENHEIT 160.0 |
| CONNECTION STYLE AHNC | — |
| BONNET ATTACHMENT METHOD ADST | INTEGRAL |
| MEDIA FOR WHICH DESIGNED MEDA | SINGLE RESPONSE FUEL/OIL, HYDROCARBON |
| FEATURES PROVIDED CBBL | PRESSURE TIGHT OUTLET SIDE |
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 |
|---|---|---|
| 10-3000-14 | 81205 | THE BOEING COMPANY DIV DEFENSE |
| A50070Z6 | 81982 | HYDRO-AIRE AEROSPACE CORP |
| M9029DCD002 | 6L817 | NATIONAL MACHINE COMPANY DBA NMG AEROSPACE |
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 23, 2026
Last purchased
1 · 1.0/yr
Purchase records
$85,300
Total demand
$85,300
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 23, 2026 | SPE7M026V5766 ↗ | — | — | $85,300 |
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
CAGE 17T81
last award Sep 2026
HYDRO-AIRE AEROSPACE CORP
no award yet
no awards on record
Listed source NATIONAL MACHINE COMPANY DBA NMG AEROSPACE
no award yet
no awards on record
Listed source THE BOEING COMPANY DIV DEFENSE
no award yet
no awards on record
Listed source CAGE 17T81 won the only award on record. CAGE 17T81 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 10, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-09-27.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-00-528-2835/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/4820-00-528-2835/