Acquisition method (AMC)
1
FSC 3120 × BEARING,PLAIN,SELF-ALIGNING
BEARING,PLAIN,SELF-ALIGNING
3120-01-253-4497 FSC 3120
NSN 3120-01-253-4497 (also written 3120012534497; NIIN 01-253-4497) is a bearing, plain, self-aligning in Federal Supply Class 3120, Bearings, Plain, Unmounted. 8 manufacturer part numbers from 7 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)
B
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC B: must be bought from the sources named on a source control or selected item drawing. 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 |
|---|---|
| BORE DIAMETER ABXV | INCHES MINIMUM 1.5557 AND INCHES MAXIMUM 1.5577 |
| OUTER MEMBER OUTSIDE DIAMETER AGGF | INCHES MINIMUM 2.3295 AND INCHES MAXIMUM 2.3300 |
| OUTER MEMBER WIDTH AGGH | INCHES MINIMUM 0.9700 AND INCHES MAXIMUM 0.9750 |
| INNER MEMBER WIDTH AGGJ | INCHES MINIMUM 0.9700 AND INCHES MAXIMUM 0.9750 |
| STATIC RADIAL LOAD RATING AGKP | POUNDS 141000 |
| HARDNESS RATING CQFM | INNER MEMBER ROCKWELL C MINIMUM 37.0 |
| HARDNESS RATING CQFM | OUTER RACE MEMBER ROCKWELL C MINIMUM 28.0 AND ROCKWELL C MAXIMUM 36.0 |
| LUBRICATION FEATURE CTLM | EXTERNAL INNER MEMBER GROOVE AND PERFORATION |
| LUBRICATION FEATURE CTLM | INTERNAL OUTER MEMBER GROOVE AND PERFORATION |
| MATERIAL MATT | LUBRICATION GREASE |
| MATERIAL MATT | INNER MEMBER COPPER ALLOY 172 OR COPPER ALLOY 173 |
| MATERIAL MATT | OUTER RACE MEMBER STEEL COMP 630 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | INNER MEMBER FED SPEC ALL MATERIAL RESPONSES QQ-C-530 QQ-C-530 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OUTER RACE MEMBER ASSN STD SINGLE MATERIAL RESPONSE A-S 5643 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | LUBRICATION MIL SPEC SINGLE MATERIAL RESPONSE -IL-G-81322 |
| SURFACE TREATMENT SFTT | OUTER RACE MEMBER CADMIUM AND CHROMATE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | OUTER RACE MEMBER FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TYE 2,CLASS 2 QQ--416 |
| STYLE DESIGNATOR STYL | — |
| SPECIFICATION/STANDARD DATA ZZZK | MANUFACTURERS STANDARD 76301-4-329 |
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 |
|---|---|---|
| 4M329G25 | 16746 | RBC SPECLINE INC DBA SPECLINE INC |
| 4M329G25 | 76301 | THE BOEING COMPANY DIV DEFENSE |
| BDS25H-329 | 09455 | RBC TRANSPORT DYNAMICS CORP DIV RBC TRANSPORT DYNAMICS |
| BDS25H-329 | 15860 | NEW HAMPSHIRE BALL BEARINGS INC DIV ASTRO DIVISION |
| BDS25H-329 | 16746 | RBC SPECLINE INC DBA SPECLINE INC |
| BDS25H-329 | 21335 | TIMKEN CO DIV THE TIMKEN COMPANY |
| BDS25H-329 | 81376 | RBC SOUTHWEST PRODUCTS, INC. |
| BDS25H-329 | 97613 | SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS |
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
$2,206.57
Purchases
1
Total spend
$33,099
Aug 20, 2026
Last purchased
2 · 2.0/yr
Purchase records
$66,197
Total demand
$2,206.57
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Aug 20, 2026 | 15 | $2,206.57 | $33,099 | MECHATRONICS, INC DBA NATIONAL PRECISION BEARING (5V122) | 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 |
|---|---|---|---|---|
| Aug 20, 2026 | SPE4A626PV026 ↗ | MECHATRONICS, INC DBA NATIONAL PRECISION BEARING | — | $33,099 |
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
MECHATRONICS, INC DBA NATIONAL PRECISION BEARING
last award Aug 2026
NEW HAMPSHIRE BALL BEARINGS INC DIV ASTRO DIVISION
no award yet
no awards on record
Listed source RBC SOUTHWEST PRODUCTS, INC.
no award yet
no awards on record
Listed source RBC SPECLINE INC DBA SPECLINE INC
no award yet
no awards on record
Listed source RBC TRANSPORT DYNAMICS CORP DIV RBC TRANSPORT DYNAMICS
no award yet
no awards on record
Listed source SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS
no award yet
no awards on record
Listed source THE BOEING COMPANY DIV DEFENSE
no award yet
no awards on record
Listed source TIMKEN CO DIV THE TIMKEN COMPANY
no award yet
no awards on record
Listed source MECHATRONICS, INC DBA NATIONAL PRECISION BEARING won the only award on record. MECHATRONICS, INC DBA NATIONAL PRECISION BEARING won without being a listed source.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE4A6-26-T-15LF | Aug 12, 2026 | Aug 19, 2026 | 15 | 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: 2026-11-02.
- Full methodology →
Cite this page
Citation
NSN Explorer. "BEARING,PLAIN,SELF-ALIGNING." nsnexplorer.com, https://nsnexplorer.com/nsn/3120-01-253-4497/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/3120-01-253-4497/