Acquisition method (AMC)
1
FSC 4820 × DIAPHRAGM,ACTUATOR VALVE,SPECIAL
DIAPHRAGM,ACTUATOR VALVE,SPECIAL
4820-01-520-5519 FSC 4820
NSN 4820-01-520-5519 (also written 4820015205519; NIIN 01-520-5519) is a diaphragm, actuator valve, special in Federal Supply Class 4820, Valves, Nonpowered. 5 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.
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)
G
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC G: the government has a complete data package and the rights to use it. 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 |
|---|---|
| HOLE DIAMETER AAUB | INCHES NOMINAL 0.188 |
| OUTSIDE DIAMETER ABHE | INCHES NOMINAL 7.500 |
| BOLT CIRCLE DIAMETER ABKG | INCHES NOMINAL 3.500 |
| MATERIAL THICKNESS ABPX | INCHES MINIMUM 0.030 AND INCHES MAXIMUM 0.040 |
| TAPER MINOR DIAMETER ABQA | INCHES NOMINAL 6.000 |
| TAPER MAJOR DIAMETER ABQB | INCHES NOMINAL 6.500 |
| BOLT HOLE QUANTITY AECS | 6 |
| END ITEM IDENTIFICATION AGAV | AN/SLQ-48, VEHICLE, SUBMERSIBLE MINE LOCATOR, (MNS) |
| PRESSURE RATING BGST | POUNDS PER SQUARE INCH (PSI) NOMINAL 194.0 |
| SPECIAL FEATURES FEAT | PART NAME ASSIGNED BY CONTROLLING AGENCY IS; DIAPHRAGM, ROLLING SEAL. |
| MATERIAL MATT | RUBBER |
| MEDIA FOR WHICH DESIGNED MEDA | HYDRAULIC FLUID |
| 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 |
|---|---|---|
| 3-650-650-FCJ | 01170 | BELLOFRAM CORPORATION |
| 5266690 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| 5266690-002 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| 7642194 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| 7642194-002 | 53711 | NAVAL SEA SYSTEMS COMMAND |
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
—
—
Last purchased
—
Purchase records
—
Total demand
—
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.
No related contract actions on record.
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.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7MC-27-T-0088 | Oct 6, 2026 | Oct 16, 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.
- Full methodology →
Cite this page
Citation
NSN Explorer. "DIAPHRAGM,ACTUATOR VALVE,SPECIAL." nsnexplorer.com, https://nsnexplorer.com/nsn/4820-01-520-5519/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/4820-01-520-5519/