Acquisition method (AMC)
3
FSC 5310 × WASHER,FLAT
WASHER,FLAT
5310-01-657-3721 FSC 5310
NSN 5310-01-657-3721 (also written 5310016573721; NIIN 01-657-3721) is a washer, flat in Federal Supply Class 5310, Nuts and Washers. 2 manufacturer part numbers from 2 suppliers 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)
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 |
|---|---|
| CROSS-SECTIONAL SHAPE STYLE AAGR | — |
| HOLE DIAMETER AAUB | INCHES MINIMUM 1.385 AND INCHES MAXIMUM 1.425 |
| PERIPHERAL SHAPE STYLE ABMW | — |
| CENTER HOLE SHAPE STYLE ABMX | — |
| THICKNESS ABNM | INCHES MINIMUM 0.168 AND INCHES MAXIMUM 0.208 |
| HARDNESS RATING CQFM | ROCKWELL C MINIMUM 38.0 AND ROCKWELL C MAXIMUM 42.0 |
| COLOR HUES | OVERALL BLACK |
| MATERIAL MATT | OVERALL STEEL |
| SURFACE TREATMENT SFTT | OVERALL PHOSPHATE AND ZINC |
| OVERALL DIAMETER ADAV | INCHES MINIMUM 2.22 AND INCHES MAXIMUM 2.28 |
| END ITEM IDENTIFICATION AGAV | MRAP - M-ATV |
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 |
|---|---|---|
| 12641078-001 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
| 4239600 | 75Q65 | OSHKOSH DEFENSE LLC |
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
$7.17
Purchases
1
Total spend
$380.01
Aug 20, 2026
Last purchased
2 · 2.0/yr
Purchase records
$760.02
Total demand
$7.17
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Aug 20, 2026 | 53 | $7.17 | $380.01 | RUTA SUPPLIES INC (0NJT4) | 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 20, 2026 | SPE7L526V1391 ↗ | RUTA SUPPLIES INC | — | $380.01 |
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
RUTA SUPPLIES INC
last award Aug 2026
OSHKOSH DEFENSE LLC
no award yet
no awards on record
Listed source U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
no award yet
no awards on record
Listed source RUTA SUPPLIES INC won the only award on record. RUTA SUPPLIES INC won without being a listed source.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7L5-26-T-4973 | Aug 13, 2026 | Aug 24, 2026 | 53 | 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: 2026-11-02.
- Full methodology →
Cite this page
Citation
NSN Explorer. "WASHER,FLAT." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-01-657-3721/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/5310-01-657-3721/