Acquisition method (AMC)
1
FSC 4320 × RING,WEARING
RING,WEARING
4320-01-439-4495 FSC 4320
NSN 4320-01-439-4495 (also written 4320014394495; NIIN 01-439-4495) is a ring, wearing in Federal Supply Class 4320, Power and Hand Pumps. 6 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 as suitable for competitive acquisition (AMC 1).
Suffix (AMSC)
C
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, 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 | — |
| OVERALL LENGTH ABHP | INCHES NOMINAL 0.880 |
| BODY OUTSIDE DIAMETER ADAR | INCHES NOMINAL 8.124 |
| BODY INSIDE DIAMETER ADAS | INCHES NOMINAL 7.665 |
| CORNER RADIUS ADNU | OUTSIDE RIGHT CORNER INCHES NOMINAL 0.120 |
| CORNER RADIUS ADNU | INSIDE RIGHT CORNER INCHES NOMINAL 0.120 |
| END ITEM IDENTIFICATION AGAV | W/S CODE JDN, ARLEIGH BURKE CLASS DDG |
| END TO FLANGE DISTANCE AJFM | INCHES NOMINAL 0.300 |
| INTERNAL FLANGE INSIDE DIAMETER AYRE | INCHES NOMINAL 7.130 |
| INTERNAL FLANGE WIDTH AYRG | INCHES NOMINAL 0.380 |
| CENTER FLANGE THICKNESS AYRJ | INCHES NOMINAL 0.235 |
| SMALLEST EXTERNAL ANCHOR FLANGE RADIUS AYRK | INCHES NOMINAL 4.180 |
| LARGEST EXTERNAL ANCHOR FLANGE RADIUS AYRL | INCHES NOMINAL 4.430 |
| DISTANCE BELOW CENTERLINE AYRM | INCHES NOMINAL 0.440 |
| CORNER SHAPE BZLX | INSIDE RIGHT CORNER ROUND |
| CORNER SHAPE BZLX | OUTSIDE RIGHT CORNER ROUND |
| CORNER SHAPE BZLX | OUTSIDE LEFT CORNER SQUARE |
| CORNER SHAPE BZLX | INSIDE LEFT CORNER SQUARE |
| SPECIAL FEATURES FEAT | MATERIAL IS SIMSITE GRADE 302 PHENOLIC LAMINATE |
| MATERIAL MATT | PLASTIC PHENOLIC |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | MIL STD SINGLE MATERIAL RESPONSE NAVSEA DWG 803-7226047 SI-SITE GR 302 |
| PROPRIETARY CHARACTERISTICS PRPY | PACS |
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 |
|---|---|---|
| 0654C0546S901A | 63857 | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS |
| 0654C0546S902A | 63857 | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS |
| 654C0546 | 63857 | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS |
| NA1516 | 83130 | AIR & LIQUID SYSTEMS CORPORATION DBA BUFFALO PUMPS |
| NA1516-2 | 83130 | AIR & LIQUID SYSTEMS CORPORATION DBA BUFFALO PUMPS |
| NA6080D-1 PIECE 9 | 83130 | AIR & LIQUID SYSTEMS CORPORATION DBA BUFFALO 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
—
Sep 23, 2026
Last purchased
1 · 1.0/yr
Purchase records
$275,035
Total demand
$275,035
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 |
|---|---|---|---|---|
| Sep 23, 2026 | SPE7M126PA429 ↗ | CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS | — | $275,035 |
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
CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS
last award Sep 2026
AIR & LIQUID SYSTEMS CORPORATION DBA BUFFALO PUMPS
no award yet
no awards on record
Listed source CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS 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 Oct 10, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-09-27.
- Full methodology →
Cite this page
Citation
NSN Explorer. "RING,WEARING." nsnexplorer.com, https://nsnexplorer.com/nsn/4320-01-439-4495/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/4320-01-439-4495/