Acquisition method (AMC)
1
FSC 5310 × NUT,SELF-LOCKING,EXTENDED WASHER
NUT,SELF-LOCKING,EXTENDED WASHER
5310-01-387-0391 FSC 5310
NSN 5310-01-387-0391 (also written 5310013870391; NIIN 01-387-0391) is a nut, self-locking, extended washer in Federal Supply Class 5310, Nuts and Washers. 6 manufacturer part numbers from 5 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)
L
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC L: annual buy value is below the screening threshold. 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 |
|---|---|
| THREAD CLASS AAJD | 3B |
| THREAD DIRECTION AAJF | RIGHT-HAND |
| LOCKING FEATURE AAUM | PREVAILING TORQUE ALL METAL DESIGN |
| WASHER OUTSIDE DIAMETER AAVX | INCHES MAXIMUM 0.636 |
| LUBRICATION ABAJ | SOLUBLE LUBRICANT |
| OVERALL HEIGHT ABKW | INCHES MAXIMUM 0.465 |
| NUT STYLE ACTA | — |
| WASHER THICKNESS ADEM | INCHES MINIMUM 0.117 AND INCHES MAXIMUM 0.127 |
| WIDTH ACROSS FLATS ASDB | INCHES MINIMUM 0.367 AND INCHES MAXIMUM 0.376 |
| THREAD SERIES BZRR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH CMLP | 24 |
| HARDNESS RATING CQFM | ROCKWELL C MINIMUM 39.0 AND ROCKWELL C MAXIMUM 43.0 |
| NOMINAL THREAD SIZE CQJX | INCHES 0.312 |
| MATERIAL MATT | SEAL PLASTIC POLYTETRAFLUOROETHYLENE |
| MATERIAL MATT | NUT STEEL COMP 8740 OR STEEL COMP E4340 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | NUT MIL SPEC 1ST MATERIAL RESPONSE -IL-S-6049 OR MIL SPEC 2ND MATERIAL RESPONSE -IL-S-5000 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | SEAL MIL SPEC SINGLE MATERIAL RESPONSE -IL--19468 |
| SURFACE TREATMENT SFTT | NUT CADMIUM AND CHROMATE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | NUT FED SPEC SINGLE TREATMENT RESPONSE QQ--416, TY2, CL2 QQ--416 |
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 |
|---|---|---|
| BH00529-5 | 27238 | BRISTOL INDUSTRIES, LLC |
| KFN556-5 | 15653 | HOWMET GLOBAL FASTENING SYSTEMS INC |
| KFN556-5 | 17446 | HUCK INTERNATIONAL, INC |
| KFN556-5 | 27238 | BRISTOL INDUSTRIES, LLC |
| KFN556-5 | 27624 | SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS |
| KFN556-5 | 97928 | HUCK INTL 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 26, 2026
Last purchased
1 · 1.0/yr
Purchase records
$1,687
Total demand
$1,687
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 26, 2026 | SPE4A626V333X ↗ | — | — | $1,687 |
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 9FN87
last award Aug 2026
BRISTOL INDUSTRIES, LLC
no award yet
no awards on record
Listed source HOWMET GLOBAL FASTENING SYSTEMS INC
no award yet
no awards on record
Listed source HUCK INTERNATIONAL, INC
no award yet
no awards on record
Listed source HUCK INTL INC
no award yet
no awards on record
Listed source SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS
no award yet
no awards on record
Listed source CAGE 9FN87 won the only award on record. CAGE 9FN87 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 Oct 28, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-10-28.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,SELF-LOCKING,EXTENDED WASHER." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-01-387-0391/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/5310-01-387-0391/