Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-01-659-4447 FSC 4820
NSN 4820-01-659-4447 (also written 4820016594447; NIIN 01-659-4447) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 2 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)
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 |
|---|---|
| FLOW CONTROL DEVICE ADQU | POPPET |
| DISK LOADING METHOD ADSU | SPRING |
| MAXIMUM OPERATING TEMP AEHZ | SINGLE RESPONSE FAHRENHEIT 165.00 |
| MINIMUM OPERATING TEMP AEQJ | FAHRENHEIT -320.00 |
| END ITEM IDENTIFICATION AGAV | 3655-01-604-1576 |
| CONNECTION TYPE AWLS | FIRST END THREADED EXTERNAL PIPE |
| THREAD QUANTITY PER INCH CMLP | 18 |
| ADJUSTABLE PRESSURE RANGE CQCY | POUNDS PER SQUARE INCH 50.00 TO 500.00 |
| NOMINAL THREAD SIZE CQJX | FIRST END INCHES 0.250 |
| OPENING PRESSURE SETTING CSDC | POUNDS PER SQUARE INCH 100.00 |
| FACE TO FACE DISTANCE CWCF | INCHES 2.50 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY CXCY | VALVE, PRESSURE RELIEF |
| MATERIAL MATT | BODY COPPER ALLOY |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | BODY ASSN STD SINGLE MATERIAL RESPONSE AST- B61 |
| PROPRIETARY CHARACTERISTICS PRPY | PACS |
| STYLE DESIGNATOR STYL | — |
| SUPPLEMENTARY FEATURES SUPP | CLEAN AND INDIVIDUAL PACKAGE FOR OXYGEN SERVICE; |
| THREAD SERIES DESIGNATOR THSD | FIRST END NPT |
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 |
|---|---|---|
| 8C-0684 | 19062 | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES |
| 8C-0684-0005 | 19062 | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES |
| LCV-250B-K-100 | 98678 | GENERANT COMPANY, 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
$292.50
Purchases
1
Total spend
$585.00
Sep 21, 2026
Last purchased
2 · 2.0/yr
Purchase records
$1,170
Total demand
$292.50
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Sep 21, 2026 | 2 | $292.50 | $585.00 | PHOENIX TRADING INC. (4LF36) | Unknown | Source ↗ |
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 21, 2026 | SPE7MC26V4536 ↗ | PHOENIX TRADING INC. | — | $585.00 |
Demand history
Every solicitation we've indexed for this NSN, open and closed — 1 on record. Closed RFQs (expired, cancelled, or awarded) stay here as a record of past demand; they never get removed.
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
PHOENIX TRADING INC.
last award Sep 2026
ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES
no award yet
no awards on record
Listed source GENERANT COMPANY, INC.
no award yet
no awards on record
Listed source PHOENIX TRADING INC. won the only award on record. PHOENIX TRADING INC. won without being a listed source.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7MC-26-T-269R | Sep 11, 2026 | Sep 21, 2026 | 2 | Expired | View at DIBBS → |
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: 2026-10-05.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-659-4447/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-659-4447/