Acquisition method (AMC)
3
FSC 5310 × NUT,SELF-LOCKING,EXTENDED WASHER
NUT,SELF-LOCKING,EXTENDED WASHER
5310-01-598-8901 FSC 5310
NSN 5310-01-598-8901 (also written 5310015988901; NIIN 01-598-8901) is a nut, self-locking, extended washer 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)
Z
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC Z: a commercial, nondevelopmental or off-the-shelf item. 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 |
|---|---|
| NOMINAL THREAD SIZE CQJX | MILLIMETERS 5.0 |
| HARDNESS RATING CQFM | ROCKWELL C NOMINAL 28.0 |
| NUT STYLE ACTA | — |
| THREAD SERIES BZRR | M |
| OVERALL HEIGHT ABKW | MILLIMETERS NOMINAL 7.1 |
| TEMP RATING AZKQ | FAHRENHEIT MAXIMUM 250.0 |
| MATERIAL MATT | OVERALL EXCEPT INSERT STEEL |
| SURFACE TREATMENT SFTT | OVERALL EXCEPT INSERT ZINC |
| THREAD CLASS AAJD | 2B |
| WASHER THICKNESS ADEM | MILLIMETERS NOMINAL 1.0 |
| WIDTH ACROSS FLATS ASDB | MILLIMETERS NOMINAL 8.0 |
| MATERIAL MATT | LOCKING INSERT PLASTIC POLYAMIDE NYLON |
| THREAD DIRECTION AAJF | RIGHT-HAND |
| LOCKING FEATURE AAUM | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| WASHER OUTSIDE DIAMETER AAVX | MILLIMETERS NOMINAL 11.8 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY CXCY | NYLON-INSERT HEX FLANGE LOCKNUT |
| THREAD PITCH IN MILLIMETERS CQQR | 0.8 |
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 |
|---|---|---|
| 3931486C1 | 338X5 | ND DEFENSE LLC |
| 92461A200 | 39428 | MCMASTER-CARR SUPPLY CO |
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
$6.06
Purchases
1
Total spend
$12.12
Aug 7, 2026
Last purchased
2 · 2.0/yr
Purchase records
$24.24
Total demand
$6.06
Latest unit price
Purchase history
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 7, 2026 | SPE7L126V155F ↗ | — | — | $12.12 |
Demand history
Every solicitation we've indexed for this NSN, open and closed — 2 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.
- Solicitation posted
- Award made
Dot size shows quantity. A faint bar joins a solicitation to the award made against it.
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
CAGE 9C2V1
last award Aug 2026
MCMASTER-CARR SUPPLY CO
no award yet
no awards on record
Listed source ND DEFENSE LLC
no award yet
no awards on record
Listed source CAGE 9C2V1 won the only award on record. CAGE 9C2V1 won without being a listed source.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE7L1-27-T-0390 | Oct 7, 2026 | Oct 19, 2026 | 1 | Expired | View at DIBBS → |
| SPE7L1-26-T-906Y | Aug 4, 2026 | Aug 14, 2026 | 2 | 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.
- Data last refreshed: 2026-11-05.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,SELF-LOCKING,EXTENDED WASHER." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-01-598-8901/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/5310-01-598-8901/