# NSN 3120-00-975-4984: Bearing, Plain, Self-Aligning

NSN 3120-00-975-4984 (also written 3120009754984; NIIN 00-975-4984) 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 Sep 2026.

## Identification

- NSN: 3120-00-975-4984 (3120009754984)
- NIIN: 00-975-4984 (009754984)
- 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 |
| --- | --- | --- |
| CTLM | LUBRICATION FEATURE | OUTER RACE MEMBER PERFORATION |
| CTLM | LUBRICATION FEATURE | INTERNAL OUTER MEMBER GROOVE |
| CTLM | LUBRICATION FEATURE | INTERNAL INNER MEMBER GROOVE |
| CTLM | LUBRICATION FEATURE | INNER MEMBER PERFORATION |
| CQFM | HARDNESS RATING | INNER MEMBER ROCKWELL C NOMINAL 56.0 |
| CQFM | HARDNESS RATING | OUTER RACE MEMBER ROCKWELL C MINIMUM 30.0 AND ROCKWELL C MAXIMUM 42.0 |
| ABXV | BORE DIAMETER | INCHES MINIMUM 0.2495 AND INCHES MAXIMUM 0.2500 |
| AGGF | OUTER MEMBER OUTSIDE DIAMETER | INCHES MINIMUM 0.6557 AND INCHES MAXIMUM 0.6562 |
| AGGH | OUTER MEMBER WIDTH | INCHES MINIMUM 0.2450 AND INCHES MAXIMUM 0.2550 |
| AGGJ | INNER MEMBER WIDTH | INCHES MINIMUM 0.3380 AND INCHES MAXIMUM 0.3430 |
| AGKP | STATIC RADIAL LOAD RATING | POUNDS 7300 |
| MATT | MATERIAL | INNER MEMBER STEEL COMP E52100 |
| MATT | MATERIAL | LUBRICATION GREASE AND LUBRICANT DRY FILM |
| MATT | MATERIAL | OUTER RACE MEMBER STEEL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | LUBRICATION MIL SPEC SINGLE MATERIAL RESPONSE -IL-G-23827 |
| SFTT | SURFACE TREATMENT | INNER MEMBER CHROMIUM |
| SFTT | SURFACE TREATMENT | OUTER RACE MEMBER CADMIUM |
| STYL | STYLE DESIGNATOR | — |
| TEST | TEST DATA DOCUMENT | SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). 81349--IL-B-5628 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 55171 | 09455 | RBC TRANSPORT DYNAMICS CORP DIV RBC TRANSPORT DYNAMICS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| GB14B4 | 02758 | U S BEARINGS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| GB14B4 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| GE14B4 | 02758 | U S BEARINGS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| HSBG4-12 | 97613 | SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| HSBG4SP14 | 15860 | NEW HAMPSHIRE BALL BEARINGS INC DIV ASTRO DIVISION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| LHAE4G | 73134 | ROLLER BEARING COMPANY OF AMERICA, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| RSPG4A | 99528 | RADIAL BEARING CORPORATION DBA RADIAL BEARING CORP OF CONNECTICU DIV RADIAL BEARING LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-22 | $242.00 | 6 | AVIARMS SUPPORT CORP | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=3120009754984) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-22 | [SPE4A626P0L89](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=3120009754984) | BEARING, PLAIN, SELF- | AVIARMS SUPPORT CORP | $1,452.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=3120009754984&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=3120009754984
- 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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