# NSN 3120-01-253-4497: Bearing, Plain, Self-Aligning

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.

## Identification

- NSN: 3120-01-253-4497 (3120012534497)
- NIIN: 01-253-4497 (012534497)
- Item name: BEARING,PLAIN,SELF-ALIGNING
- Federal Supply Class: [FSC 3120 Bearings, Plain, Unmounted](https://nsnexplorer.com/fsc/3120/)
- Federal Supply Group: [FSG 31](https://nsnexplorer.com/group/31/)
- Acquisition method suffix code: AMSC B: must be bought from the sources named on a source control or selected item drawing. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABXV | BORE DIAMETER | INCHES MINIMUM 1.5557 AND INCHES MAXIMUM 1.5577 |
| AGGF | OUTER MEMBER OUTSIDE DIAMETER | INCHES MINIMUM 2.3295 AND INCHES MAXIMUM 2.3300 |
| AGGH | OUTER MEMBER WIDTH | INCHES MINIMUM 0.9700 AND INCHES MAXIMUM 0.9750 |
| AGGJ | INNER MEMBER WIDTH | INCHES MINIMUM 0.9700 AND INCHES MAXIMUM 0.9750 |
| AGKP | STATIC RADIAL LOAD RATING | POUNDS 141000 |
| CQFM | HARDNESS RATING | INNER MEMBER ROCKWELL C MINIMUM 37.0 |
| CQFM | HARDNESS RATING | OUTER RACE MEMBER ROCKWELL C MINIMUM 28.0 AND ROCKWELL C MAXIMUM 36.0 |
| CTLM | LUBRICATION FEATURE | EXTERNAL INNER MEMBER GROOVE AND PERFORATION |
| CTLM | LUBRICATION FEATURE | INTERNAL OUTER MEMBER GROOVE AND PERFORATION |
| MATT | MATERIAL | LUBRICATION GREASE |
| MATT | MATERIAL | INNER MEMBER COPPER ALLOY 172 OR COPPER ALLOY 173 |
| MATT | MATERIAL | OUTER RACE MEMBER STEEL COMP 630 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | INNER MEMBER FED SPEC ALL MATERIAL RESPONSES QQ-C-530 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OUTER RACE MEMBER ASSN STD SINGLE MATERIAL RESPONSE A-S 5643 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | LUBRICATION MIL SPEC SINGLE MATERIAL RESPONSE -IL-G-81322 |
| SFTT | SURFACE TREATMENT | OUTER RACE MEMBER CADMIUM AND CHROMATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OUTER RACE MEMBER FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TYE 2,CLASS 2 |
| STYL | STYLE DESIGNATOR | — |
| ZZZK | SPECIFICATION/STANDARD DATA | MANUFACTURERS STANDARD 76301-4-329 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4M329G25 | 16746 | RBC SPECLINE INC DBA SPECLINE INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4M329G25 | 76301 | THE BOEING COMPANY DIV DEFENSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BDS25H-329 | 09455 | RBC TRANSPORT DYNAMICS CORP DIV RBC TRANSPORT DYNAMICS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BDS25H-329 | 15860 | NEW HAMPSHIRE BALL BEARINGS INC DIV ASTRO DIVISION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BDS25H-329 | 16746 | RBC SPECLINE INC DBA SPECLINE INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BDS25H-329 | 21335 | TIMKEN CO DIV THE TIMKEN COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BDS25H-329 | 81376 | RBC SOUTHWEST PRODUCTS, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| BDS25H-329 | 97613 | SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-08-20 | $2,206.57 | 15 | MECHATRONICS, INC DBA NATIONAL PRECISION BEARING | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=3120012534497) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-20 | [SPE4A626PV026](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=3120012534497) | BEARING, PLAIN, SELF- | MECHATRONICS, INC DBA NATIONAL PRECISION BEARING | $33,098.55 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=3120012534497&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=3120012534497
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- All data is public U.S. government data; every row above links to its source record where one exists.

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