Acquisition method (AMC)
5
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-00-097-8171 FSC 4820
NSN 4820-00-097-8171 (also written 4820000978171; NIIN 00-097-8171) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 4 manufacturer part numbers from 4 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 from a sole-source contractor that is not the actual manufacturer (AMC 5).
Suffix (AMSC)
R
Competition
Coded for a named source
AMC 5: buy from a sole-source contractor that is not the actual manufacturer. AMSC R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. 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 DIRECTION AAJF | FIRST END RIGHT-HAND |
| THREAD DIRECTION AAJF | SECOND END RIGHT-HAND |
| CONNECTION TYPE AWLS | FIRST END THREADED INTERNAL PIPE |
| CONNECTION TYPE AWLS | SECOND END THREADED INTERNAL PIPE |
| ADJUSTABLE PRESSURE RANGE CQCY | POUNDS PER SQUARE INCH 300.0 TO 1500.0 |
| NOMINAL THREAD SIZE CQJX | FIRST END INCHES 0.500 |
| NOMINAL THREAD SIZE CQJX | SECOND END INCHES 0.250 |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 1500.0 |
| THREAD SERIES DESIGNATOR THSD | FIRST END NPT |
| THREAD SERIES DESIGNATOR THSD | SECOND END NPT |
| FLOW CONTROL DEVICE ADQU | STEM |
| BONNET TYPE ADSR | INSIDE SCREW |
| BONNET ATTACHMENT METHOD ADST | INTEGRAL |
| DISK LOADING METHOD ADSU | SPRING |
| CONNECTION STYLE AHNC | — |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| MATERIAL MATT | OVERALL STEEL COMP 303 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL FED SPEC SINGLE MATERIAL RESPONSE QQ-S-764,TYE303-CANCELED QQ-S-764 |
| STYLE DESIGNATOR STYL | — |
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 |
|---|---|---|
| 75321-6 | 86768 | TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT |
| 75321-61 | 1STQ3 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA SPRAGUE PRODUCTS DIV CURTISS-WRIGHT FLOW CONTROLS |
| 871316 | 09786 | ORDNANCE SUPPLY OFFICE |
| 871316 | 19203 | COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV US ARMY RESEARCH, DEVELOPMENT AND ENGINEERING COMMAND ARMAMENT |
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 8, 2026
Last purchased
1 · 1.0/yr
Purchase records
$5,111
Total demand
$5,111
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 8, 2026 | SPE7MC26V2953 ↗ | LARKOS PACKING AND DISTRIBUTION INC. | — | $5,111 |
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
LARKOS PACKING AND DISTRIBUTION INC.
last award Sep 2026
COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV US ARMY RESEARCH, DEVELOPMENT AND ENGINEERING COMMAND ARMAMENT
no award yet
no awards on record
Listed source CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA SPRAGUE PRODUCTS DIV CURTISS-WRIGHT FLOW CONTROLS
no award yet
no awards on record
Listed source ORDNANCE SUPPLY OFFICE
no award yet
no awards on record
Listed source TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT
no award yet
no awards on record
Listed source LARKOS PACKING AND DISTRIBUTION INC. won the only award on record. LARKOS PACKING AND DISTRIBUTION INC. 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 27, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-10-24.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-00-097-8171/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-00-097-8171/