The Roller,bearing, cataloged under National Stock Number 3110-01-155-6124, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Timken Aerospace, Inc Dba Torrington Product. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-155-6124 |
| Primary Part Number | Q-12378 |
| Item Name | Roller,bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Timken Aerospace, Inc Dba Torrington Product |
| Status | ACTIVE |
| Rolling Element Diameter | 0.3123 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN |
| Style Designator | CYLINDRICAL ROLLER, FLAT ENDS |
| Material | STEEL COMP E52100 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| Q-12378 PRIMARY | Timken Aerospace, Inc Dba Torrington Product (USA) |
| Reference | Meaning |
|---|---|
| SR-903 | 5/9 Secondary reference Bremen Bearing Co |
NSN 3110-01-155-6124 is a Roller,bearing, manufactured by Timken Aerospace, Inc Dba Torrington Product, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-155-6124 has 1 manufacturer part number on file: Q-12378 (Timken Aerospace, Inc Dba Torrington Product).
Key specifications for Q-12378: Rolling Element Diameter: 0.3123 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN; Style Designator: CYLINDRICAL ROLLER, FLAT ENDS; Overall Length: 0.8540 INCHES MINIMUM AND 0.8640 INCHES MAXIMUM IN; Special Features: ROCKWELL HARDNESS C 60.0 MIN 64.0 MAX. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.