Acquisition method (AMC)
1
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-00-494-0755 FSC 4820
NSN 4820-00-494-0755 (also written 4820004940755; NIIN 00-494-0755) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 11 manufacturer part numbers from 8 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)
T
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC T: handled under qualified products list procedures. 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 QUANTITY PER INCH CMLP | 27 |
| VALVE OPERATION METHOD AQLR | AUTOMATIC |
| MEDIA FOR WHICH DESIGNED MEDA | SECOND RESPONSE OXYGEN, LIQUID |
| FEATURES PROVIDED CBBL | PRESSURE TIGHT OUTLET SIDE |
| MATERIAL MATT | OVERALL ALUMINUM ALLOY |
| CONNECTION TYPE AWLS | FIRST END THREADED INTERNAL PIPE |
| NOMINAL THREAD SIZE CQJX | FIRST END INCHES 0.125 |
| NOMINAL THREAD SIZE CQJX | SECOND END INCHES 0.125 |
| OPERATING PRESSURE CQQF | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 140.0 |
| CRITICALITY CODE JUSTIFICATION CRTL | CQGM |
| THREAD SERIES DESIGNATOR THSD | FIRST END ANPT |
| NOMINAL PIPE SIZE ACCOMMODATED AAAR | FIRST END INCHES 0.125 |
| NOMINAL PIPE SIZE ACCOMMODATED AAAR | SECOND END INCHES 0.125 |
| THREAD DIRECTION AAJF | FIRST END RIGHT-HAND |
| THREAD DIRECTION AAJF | SECOND END RIGHT-HAND |
| FLOW CONTROL DEVICE ADQU | POPPET |
| DISK LOADING METHOD ADSU | SPRING |
| VALVE DISCHARGE FLOW RATE ADSY | LITERS PER MINUTE 100.0 |
| MAXIMUM OPERATING TEMP AEHZ | SINGLE RESPONSE FAHRENHEIT 260.0 |
| CONNECTION STYLE AHNC | — |
| TEST DATA DOCUMENT TEST | SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). 81349--IL-V-9050 |
| STYLE DESIGNATOR STYL | — |
| THREAD SERIES DESIGNATOR THSD | SECOND END ANPT |
| CONNECTION TYPE AWLS | SECOND END THREADED EXTERNAL PIPE |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL MIL SPEC SINGLE MATERIAL RESPONSE -IL-V-9050 |
| MEDIA FOR WHICH DESIGNED MEDA | FIRST RESPONSE OXYGEN, GASEOUS |
| NONDEFINITIVE SPEC/STD DATA ZZZT | TYPE 5 |
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 |
|---|---|---|
| 10525-3 | 31441 | AMERICAN SAFETY FLIGHT SYSTEMS INC |
| 20C-0050-5 | 19062 | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES |
| 20C0005-50 | 19062 | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES |
| 20C0005-50 | 83533 | ESSEX INDUSTRIES INC DIV MANUFACTURING DIVISION |
| 21247-12 | 03990 | INGERSOLL-RAND COMPANY DBA INGERSOLL-RAND |
| 21247-12 | 04577 | MISSION SYSTEMS ORCHARD PARK INC |
| 8661132 | 64640 | LASER TECHNOLOGY INC |
| M9050-5 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| M9050-5 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| MIL-PRF-9050 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| MIL-V-9050 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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 13, 2026
Last purchased
1 · 1.0/yr
Purchase records
$117,935
Total demand
$117,935
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 13, 2026 | SPE7MC26P3397 ↗ | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES | — | $117,935 |
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
ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES
last award Aug 2026
AMERICAN SAFETY FLIGHT SYSTEMS INC
no award yet
no awards on record
Listed source ESSEX INDUSTRIES INC DIV MANUFACTURING DIVISION
no award yet
no awards on record
Listed source INGERSOLL-RAND COMPANY DBA INGERSOLL-RAND
no award yet
no awards on record
Listed source LASER TECHNOLOGY INC
no award yet
no awards on record
Listed source MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
no award yet
no awards on record
Listed source MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
no award yet
no awards on record
Listed source MISSION SYSTEMS ORCHARD PARK INC
no award yet
no awards on record
Listed source ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES 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: 2026-11-03.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-00-494-0755/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-00-494-0755/