Acquisition method (AMC)
3
FSC 5310 × NUT,SELF-LOCKING,BARREL
NUT,SELF-LOCKING,BARREL
5310-01-031-0775 FSC 5310
NSN 5310-01-031-0775 (also written 5310010310775; NIIN 01-031-0775) is a nut, self-locking, barrel in Federal Supply Class 5310, Nuts and Washers. 5 manufacturer part numbers from 4 suppliers are on record. It was last purchased in Oct 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)
P
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC P: the government does not own the rights to the data needed for more sources. 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 |
| COUNTERBORE DIAMETER AAWY | NUT INCHES MINIMUM 0.281 AND INCHES MAXIMUM 0.291 |
| NUT STYLE ACTA | — |
| NUT DIAMETER ACTD | INCHES MINIMUM 0.474 AND INCHES MAXIMUM 0.484 |
| NUT LENGTH ACVN | INCHES MINIMUM 0.474 AND INCHES MAXIMUM 0.494 |
| BARREL HEIGHT ADBA | INCHES MINIMUM 0.287 AND INCHES MAXIMUM 0.307 |
| NUT HEIGHT ADEA | INCHES MAXIMUM 0.385 |
| NUT COUNTERBORE DEPTH ADFK | NUT INCHES MINIMUM 0.090 AND INCHES MAXIMUM 0.110 |
| TEMP RATING AZKQ | FAHRENHEIT NOMINAL 450.0 |
| THREAD SERIES BZRR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH CMLP | 28 |
| HARDNESS RATING CQFM | ROCKWELL C MAXIMUM 43.0 |
| NOMINAL THREAD SIZE CQJX | INCHES 0.250 |
| MATERIAL MATT | OVERALL STEEL COMP 4340 OR STEEL COMP 8740 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL MIL SPEC 1ST MATERIAL RESPONSE -IL-S-5000 OR MIL SPEC 2ND MATERIAL RESPONSE -IL-S-6049 OR ASSN STD 2ND MATERIAL RESPONSE A-S 6322 |
| SURFACE TREATMENT SFTT | OVERALL CADMIUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 2,CL 3 QQ--416 |
| SPECIFICATION/STANDARD DATA ZZZK | MANUFACTURERS STANDARD 81205-BACN10HC |
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 |
|---|---|---|
| BACN10HC4 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| BACN10HC4 | 81205 | THE BOEING COMPANY DIV DEFENSE |
| BACN10HC4 | 97393 | SPS TECHNOLOGIES LLC DBA SHUR-LOK COMPANY DIV AEROSPACE ENGINEERED PRODUCTS DIVISION |
| LH8065-048 | 72962 | HARVARD INDUSTRIES INC |
| SL414-4 | 97393 | SPS TECHNOLOGIES LLC DBA SHUR-LOK COMPANY DIV AEROSPACE ENGINEERED PRODUCTS DIVISION |
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
$9.63
Purchases
1
Total spend
$9,553
Oct 8, 2026
Last purchased
2 · 2.0/yr
Purchase records
$19,106
Total demand
$9.63
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Oct 8, 2026 | 992 | $9.63 | $9,553 | DEFENSE SUPPORT SERVICES, INC. (1L3U4) | 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 |
|---|---|---|---|---|
| Oct 8, 2026 | SPE4A627V0305 ↗ | DEFENSE SUPPORT SERVICES, INC. | — | $9,553 |
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
DEFENSE SUPPORT SERVICES, INC.
last award Oct 2026
HARVARD INDUSTRIES INC
no award yet
no awards on record
Listed source SPS TECHNOLOGIES LLC DBA SHUR-LOK COMPANY DIV AEROSPACE ENGINEERED PRODUCTS DIVISION
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 DIV DEFENSE
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.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE4A6-26-T-33LN | Sep 21, 2026 | Sep 28, 2026 | 992 | 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: 2026-10-10.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,SELF-LOCKING,BARREL." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-01-031-0775/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/5310-01-031-0775/