Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-00-451-0570 FSC 4820
NSN 4820-00-451-0570 (also written 4820004510570; NIIN 00-451-0570) 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 Aug 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)
D
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC D: the data needed to compete the part is unavailable or cannot be obtained economically. 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 |
|---|---|
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| CONNECTION STYLE AHNC | — |
| VALVE DISCHARGE FLOW RATE ADSY | GALLONS PER MINUTE 6.0 |
| THREAD DIRECTION AAJF | FIRST END RIGHT-HAND |
| NOMINAL THREAD SIZE CQJX | FIRST END INCHES 0.750 |
| MAXIMUM OPERATING TEMP AEHZ | SINGLE RESPONSE FAHRENHEIT 275.0 |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 35.0 |
| OPENING PRESSURE SETTING CSDC | POUNDS PER SQUARE INCH 48.0 |
| NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED CWFD | FIRST END INCHES 0.500 |
| NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED CWFD | SECOND END INCHES 0.500 |
| SPECIAL FEATURES FEAT | SECOND END DESCRIPTION IS INLET |
| MATERIAL MATT | BODY STEEL COMP 303 |
| MATERIAL MATT | FLOW CONTROL DEVICE STEEL COMP 630 |
| MATERIAL MATT | SEAT STEEL COMP 303 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | BODY FED SPEC 1ST MATERIAL RESPONSE QQ-S-764,TYE 303-CANCELED QQ-S-764 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | FLOW CONTROL DEVICE MFR REF 2ND MATERIAL RESPONSE A-S 5643 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | SEAT FED SPEC 3RD MATERIAL RESPONSE QQ-S-764,TYE 303-CANCELED QQ-S-764 |
| MEDIA FOR WHICH DESIGNED MEDA | SINGLE RESPONSE HYDRAULIC FLUID, MINERAL BASE |
| THREAD SERIES DESIGNATOR THSD | FIRST END UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD SERIES DESIGNATOR THSD | SECOND END UNF |
| CONNECTION TYPE AWLS | SECOND END THREADED EXTERNAL BOSS |
| FEATURES PROVIDED CBBL | PRESSURE TIGHT OUTLET SIDE |
| BONNET TYPE ADSR | PACKING RETAINING |
| DISK LOADING METHOD ADSU | SPRING |
| THREAD QUANTITY PER INCH CMLP | 16 |
| CONNECTION TYPE AWLS | FIRST END THREADED INTERNAL BOSS |
| THREAD CLASS AAJD | 3A |
| THREAD CLASS AAJD | 3B |
| NOMINAL THREAD SIZE CQJX | SECOND END INCHES 0.750 |
| THREAD DIRECTION AAJF | SECOND END RIGHT-HAND |
| FLOW CONTROL DEVICE ADQU | POPPET |
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 |
|---|---|---|
| 65651-09106-102 | 78286 | SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP |
| H555 | 06239 | AUSCO 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
—
Purchases
0
Total spend
—
Aug 12, 2026
Last purchased
1 · 1.0/yr
Purchase records
$50,185
Total demand
$50,185
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 12, 2026 | SPE7MC26V3905 ↗ | AUSCO INC | — | $50,185 |
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
AUSCO INC
last award Aug 2026
SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP
no award yet
no awards on record
Listed source AUSCO INC won the only award on record.
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 Nov 4, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-11-04.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-00-451-0570/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-00-451-0570/