Acquisition method (AMC)
1
FSC 5310 × NUT,SELF-LOCKING,DOUBLE HEXAGON
NUT,SELF-LOCKING,DOUBLE HEXAGON
5310-01-550-0311 FSC 5310
NSN 5310-01-550-0311 (also written 5310015500311; NIIN 01-550-0311) is a nut, self-locking, double hexagon in Federal Supply Class 5310, Nuts and Washers. 5 manufacturer part numbers from 4 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 |
|---|---|
| THREAD CLASS AAJD | 3B |
| THREAD DIRECTION AAJF | RIGHT-HAND |
| NUT STYLE ACTA | — |
| NUT HEIGHT ADEA | INCHES NOMINAL 0.430 |
| END ITEM IDENTIFICATION AGAV | 1520-01-355-8250 |
| THREAD SERIES BZRR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH CMLP | 20 |
| HARDNESS RATING CQFM | ROCKWELL C MAXIMUM 44.0 |
| NOMINAL THREAD SIZE CQJX | INCHES 0.437 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY CXCY | NUT,DOUBLE HEXAGON,SELF-LOCKING,ALLOY STEEL 450 F,200KSI,FLANGED |
| MATERIAL MATT | OVERALL STEEL COMP 8740 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S 6322 OR ASSN STD SINGLE MATERIAL RESPONSE A-S 6304 |
| SURFACE TREATMENT SFTT | OVERALL CADMIUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | OVERALL ASSN STD SINGLE TREATMENT RESPONSE A-S-QQ--416 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 |
|---|---|---|
| 95855-5 | 83324 | HOWMET GLOBAL FASTENING SYSTEMS INC DIV ROSAN PRODUCTS |
| 95855-720 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| H56351-5 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| H56351-7 | 15653 | HOWMET GLOBAL FASTENING SYSTEMS INC |
| HS6137-5 | 8V613 | THE BOEING COMPANY |
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
$3,843
Total demand
$3,843
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 | SPE4A626DC039/SPE4A626F504L ↗ | DEFENSE SUPPORT SERVICES, INC. | — | $3,843 |
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
DEFENSE SUPPORT SERVICES, INC.
last award Sep 2026
HOWMET GLOBAL FASTENING SYSTEMS INC
no award yet
no awards on record
Listed source HOWMET GLOBAL FASTENING SYSTEMS INC DIV ROSAN PRODUCTS
no award yet
no awards on record
Listed source SPS TECHNOLOGIES, LLC DBA PB FASTENERS
no award yet
no awards on record
Listed source THE BOEING COMPANY
no award yet
no awards on record
Listed source DEFENSE SUPPORT SERVICES, INC. won the only award on record. DEFENSE SUPPORT SERVICES, INC. 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 10, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-09-27.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,SELF-LOCKING,DOUBLE HEXAGON." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-01-550-0311/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/5310-01-550-0311/