Acquisition method (AMC)
3
FSC 4320 × RING,WEARING
RING,WEARING
4320-00-383-4370 FSC 4320
NSN 4320-00-383-4370 (also written 4320003834370; NIIN 00-383-4370) is a ring, wearing in Federal Supply Class 4320, Power and Hand Pumps. 3 manufacturer part numbers from 1 supplier are on record. The government has 1 open solicitation for it.
Open for bid
1 open solicitation on record right now — quantity, close date, and where to submit.
| Solicitation | Qty | Status | |
|---|---|---|---|
| SPE7M1-27-T-2175 | 1 | Closes in 9d | Bid → |
Can you win it?
This item is coded to be bought directly from the actual manufacturer (AMC 3).
Suffix (AMSC)
C
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC C: needs engineering source approval; other sources must qualify first. 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 |
|---|---|
| BODY STYLE AAQL | — |
| CORNER SHAPE BZLX | OUTSIDE RIGHT CORNER SQUARE |
| BODY INSIDE DIAMETER ADAS | INCHES NOMINAL 5.938 |
| OVERALL LENGTH ABHP | INCHES NOMINAL 1.266 |
| DISTANCE BETWEEN FLANGES AGRS | INCHES NOMINAL 0.766 |
| END TO FLANGE DISTANCE AJFM | INCHES NOMINAL 1.000 |
| BODY OUTSIDE DIAMETER ADAR | INCHES NOMINAL 6.594 |
| CORNER SHAPE BZLX | INSIDE RIGHT CORNER ROUND |
| CORNER SHAPE BZLX | OUTSIDE LEFT CORNER SQUARE |
| CORNER RADIUS ADNU | INSIDE RIGHT CORNER INCHES NOMINAL 0.250 |
| LEFT SIDE FLANGE THICKNESS ADXL | INCHES NOMINAL 0.250 |
| DISTANCE FROM END AYRS | INCHES NOMINAL 0.281 |
| INTERNAL FLANGE INSIDE DIAMETER AYRE | INCHES NOMINAL 5.375 |
| MATERIAL MATT | COPPER ALLOY |
| LARGEST EXTERNAL ANCHOR FLANGE RADIUS AYRL | INCHES NOMINAL 3.500 |
| CORNER SHAPE BZLX | INSIDE LEFT CORNER SQUARE |
| SMALLEST EXTERNAL ANCHOR FLANGE RADIUS AYRK | INCHES NOMINAL 3.219 |
| RIGHT SIDE FLANGE THICKNESS ADXM | INCHES NOMINAL 0.250 |
| INTERNAL FLANGE WIDTH AYRG | INCHES NOMINAL 0.219 |
| DISTANCE BELOW CENTERLINE AYRM | INCHES NOMINAL 0.094 |
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 |
|---|---|---|
| 654B0261 | 63857 | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS |
| 654B0261C051A | 63857 | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS |
| 999R0341PC34 | 63857 | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS |
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 — 3 on record. Closed RFQs (expired, cancelled, or awarded) stay here as a record of past demand; they never get removed.
Buying rhythm
How often does the government buy this item, and how long since the last time? Every solicitation and award on one line.
Dot size shows quantity. A faint bar joins a solicitation to the award made against it.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7M1-27-T-2175 | Nov 6, 2026 | Nov 16, 2026 | 1 | Open | View at DIBBS → |
| SPE7M1-26-T-350E | Sep 14, 2026 | Sep 29, 2026 | 5 | Expired | View at DIBBS → |
| SPE7M1-26-T-267C | Aug 7, 2026 | Aug 24, 2026 | 3 | Cancelled | 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. "RING,WEARING." nsnexplorer.com, https://nsnexplorer.com/nsn/4320-00-383-4370/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/4320-00-383-4370/