Acquisition method (AMC)
3
FSC 4820 × VALVE,SAFETY RELIEF
VALVE,SAFETY RELIEF
4820-01-539-3979 FSC 4820
NSN 4820-01-539-3979 (also written 4820015393979; NIIN 01-539-3979) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 1 supplier 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 |
|---|---|
| STYLE DESIGNATOR STYL | — |
| FURNISHED ITEMS AND QUANTITY TMQY | LEVER 1 |
| ADJUSTABLE PRESSURE RANGE CQCY | POUNDS PER SQUARE INCH 36.0 TO 42.0 |
| MEDIA FOR WHICH DESIGNED MEDA | SINGLE RESPONSE OIL |
| MATERIAL MATT | STEM STEEL COMP 316 |
| FIRST CONNECTION FACE TO CENTERLINE DISTANCE CWCL | INCHES 3.000 |
| FLANGE FACE DESIGN CWDF | ALL ENDS RAISED STRAIGHT |
| RAISED FACE NOMINAL HEIGHT CWDH | ALL ENDS INCHES 0.062 |
| RAISED FACE NOMINAL DIAMETER CWDL | ALL ENDS INCHES 1.687 |
| FLOW CONTROL DEVICE ADQU | DISK |
| BONNET TYPE ADSR | INSIDE SPRING |
| CONNECTION TYPE AWLS | ALL ENDS FLANGE |
| VALVE SIZE CCFG | INCHES 0.750 |
| BOLT CIRCLE NOMINAL DIAMETER CWCT | ALL ENDS INCHES 2.750 |
| END ITEM IDENTIFICATION AGAV | NEW CONSTRUCTION LCS1 |
| VALVE OPERATION METHOD AQLR | AUTOMATIC OR MANUAL |
| FLANGE SHAPE ARKN | ALL ENDS ROUND WITH HOLES |
| BOLT HOLE NOMINAL DIAMETER CWCQ | ALL ENDS INCHES 0.625 |
| SECOND CONNECTION FACE TO CENTERLINE DISTANCE CWCR | INCHES 3.000 |
| BONNET ATTACHMENT METHOD ADST | BOLTED |
| DISK LOADING METHOD ADSU | SPRING |
| BOLT HOLE QUANTITY AECS | 4 |
| NOMINAL OUTSIDE DIAMETER CWCD | ALL ENDS INCHES 3.875 |
| NOMINAL THICKNESS CWCK | ALL ENDS INCHES 0.500 |
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 |
|---|---|---|
| 30216 | 72352 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS |
| 30216 AY 85DC22M-140-40PSI | 72352 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS |
| 85DC22M-140-40PSI | 72352 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS |
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
$26,613.09
Purchases
1
Total spend
$53,226
Aug 26, 2026
Last purchased
2 · 2.0/yr
Purchase records
$106,452
Total demand
$26,613.09
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Aug 26, 2026 | 2 | $26,613.09 | $53,226 | LARKOS PACKING AND DISTRIBUTION INC. (6PZL1) | 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 |
|---|---|---|---|---|
| Aug 26, 2026 | SPE7MC26V4129 ↗ | LARKOS PACKING AND DISTRIBUTION INC. | — | $53,226 |
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
LARKOS PACKING AND DISTRIBUTION INC.
last award Aug 2026
CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS
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.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7MC-26-T-193R | Aug 13, 2026 | Aug 24, 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: 2026-10-28.
- Full methodology →
Cite this page
Citation
NSN Explorer. "VALVE,SAFETY RELIEF." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-539-3979/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-539-3979/