Acquisition method (AMC)
1
FSC 5310 × NUT,SELF-LOCKING,ASSEMBLED WASHE
NUT,SELF-LOCKING,ASSEMBLED WASHE
5310-00-151-5431 FSC 5310
NSN 5310-00-151-5431 (also written 5310001515431; NIIN 00-151-5431) is a nut, self-locking, assembled washe in Federal Supply Class 5310, Nuts and Washers. 6 manufacturer part numbers from 6 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 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.
Dimensioned drawing
Generated from the federal catalog's dimensional data for this NSN — reference only, not a manufacturing drawing.
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 |
|---|---|
| THREAD QUANTITY PER INCH CMLP | 28 |
| THREAD SERIES BZRR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| OVERALL HEIGHT ABKW | INCHES MINIMUM 0.375 AND INCHES MAXIMUM 0.405 |
| NUT STYLE ACTA | — |
| NUT HEIGHT ADEA | INCHES MINIMUM 0.125 |
| NUT COUNTERBORE DEPTH ADFK | NUT INCHES MINIMUM 0.172 AND INCHES MAXIMUM 0.192 |
| WIDTH ACROSS FLATS ASDB | INCHES MINIMUM 0.430 AND INCHES MAXIMUM 0.439 |
| TEMP RATING AZKQ | FAHRENHEIT MAXIMUM 250.0 |
| THREAD CLASS AAJD | 3B |
| THREAD DIRECTION AAJF | RIGHT-HAND |
| LOCKING FEATURE AAUM | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| WASHER OUTSIDE DIAMETER AAVX | INCHES MINIMUM 0.530 AND INCHES MAXIMUM 0.560 |
| COUNTERBORE DIAMETER AAWY | NUT INCHES MINIMUM 0.299 AND INCHES MAXIMUM 0.309 |
| MATERIAL MATT | LOCKING INSERT PLASTIC NYLON |
| MATERIAL MATT | NUT STEEL COMP 1137 OR STEEL COMP 11L37 OR STEEL COMP 8740 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | NUT ASSN STD 1ST MATERIAL RESPONSE A-S 5024 OR ASSN STD 2ND MATERIAL RESPONSE A-S 5020 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6322 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6323 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6325 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6327 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6358 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | WASHER FED SPEC 1ST MATERIAL RESPONSE QQ-A-225 TO 6,T4 OR FED SPEC 2ND MATERIAL RESPONSE QQ-A-250 TO 13,T6 QQ-A-225 |
| SURFACE TREATMENT SFTT | NUT CADMIUM AND CHROMATE |
| SURFACE TREATMENT SFTT | WASHER CHROMATE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | NUT FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 2,CL 2 QQ--416 |
| BEARING SURFACE FINISH CSXL | MICROINCHES 125.0 |
| NOMINAL THREAD SIZE CQJX | INCHES 0.250 |
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 |
|---|---|---|
| F12N7699-428 | 27687 | GREER STOP NUT, INC. |
| MS21224-4 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE |
| MS21224-4 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| MS21224-4 | A0126 | LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE |
| MS21224-4 | A0170 | LEONARDO SPA AERONAUTICS DIVISION - POMIGLIANO D'ARCO SITE |
| NE8235-4 | 72962 | HARVARD INDUSTRIES INC |
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
—
Aug 20, 2026
Last purchased
1 · 1.0/yr
Purchase records
$700,000
Total demand
$700,000
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 |
|---|---|---|---|---|
| Aug 20, 2026 | SPE4A726D0423 ↗ | — | — | $700,000 |
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
CAGE 13W08
last award Aug 2026
GREER STOP NUT, INC.
no award yet
no awards on record
Listed source HARVARD INDUSTRIES INC
no award yet
no awards on record
Listed source LEONARDO SPA AERONAUTICS DIVISION - POMIGLIANO D'ARCO SITE
no award yet
no awards on record
Listed source LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE
no award yet
no awards on record
Listed source MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
no award yet
no awards on record
Listed source NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
no award yet
no awards on record
Listed source CAGE 13W08 won the only award on record. CAGE 13W08 won without being a listed source.
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 Nov 2, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-11-02.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,SELF-LOCKING,ASSEMBLED WASHE." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-00-151-5431/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/5310-00-151-5431/