Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-00-083-1263 FSC 4820
NSN 4820-00-083-1263 (also written 4820000831263; NIIN 00-083-1263) 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 to be bought directly from the actual manufacturer (AMC 3).
Suffix (AMSC)
C
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, 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 |
|---|---|
| NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED CWFD | ALL ENDS INCHES 0.250 |
| MATERIAL MATT | BODY ALUMINUM ALLOY |
| THREAD DIRECTION AAJF | ALL ENDS RIGHT-HAND |
| OPENING PRESSURE SETTING CSDC | POUNDS PER SQUARE INCH 3650.0 |
| THREAD CLASS AAJD | 3B |
| CONNECTION TYPE AWLS | ALL ENDS THREADED INTERNAL TUBE |
| FEATURES PROVIDED CBBL | PRESSURE TIGHT OUTLET SIDE |
| VALVE DISCHARGE FLOW RATE ADSY | GALLONS PER MINUTE 2.5 |
| MAXIMUM OPERATING TEMP AEHZ | SINGLE RESPONSE FAHRENHEIT 275.0 |
| CONNECTION STYLE AHNC | — |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| MEDIA FOR WHICH DESIGNED MEDA | SINGLE RESPONSE FUEL/OIL, HYDROCARBON |
| STYLE DESIGNATOR STYL | — |
| THREAD SERIES DESIGNATOR THSD | ALL ENDS UNF |
| DISK LOADING METHOD ADSU | SPRING |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 4500.0 |
| MATERIAL MATT | FLOW CONTROL DEVICE STEEL CORROSION RESISTING |
| MATERIAL MATT | SEAT ALUMINUM ALLOY |
| NOMINAL THREAD SIZE CQJX | ALL ENDS INCHES 0.437 |
| FLOW CONTROL DEVICE ADQU | DISK |
| BONNET TYPE ADSR | PACKING RETAINING |
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 |
|---|---|---|
| 128SCH136-1 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
| 128SCH136-1 | 79RG9 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
| A90293 | 81982 | HYDRO-AIRE AEROSPACE CORP |
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 24, 2026
Last purchased
1 · 1.0/yr
Purchase records
$52,500
Total demand
$52,500
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 24, 2026 | SPE7L126P9C60 ↗ | — | — | $52,500 |
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 170H9
last award Sep 2026
HYDRO-AIRE AEROSPACE CORP
no award yet
no awards on record
Listed source NORTHROP GRUMMAN SYSTEMS CORPORATION
no award yet
no awards on record
Listed source NORTHROP GRUMMAN SYSTEMS CORPORATION
no award yet
no awards on record
Listed source CAGE 170H9 won the only award on record. CAGE 170H9 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/4820-00-083-1263/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/4820-00-083-1263/