The Cam Follower,needle Bearing, cataloged under National Stock Number 3110-01-220-0265, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Rbc Aircraft Products, Inc.. Government technical data includes 26 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-220-0265 |
| Primary Part Number | 4M278BE18 |
| Item Name | Cam Follower,needle Bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Rbc Aircraft Products, Inc. |
| Status | ACTIVE |
| Cam End Diameter | 0.6250 INCHES NOMINAL IN |
| Bearing Seal Type | CONTACT |
| Outer Ring Width | 0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN |
| Eccentricity | 0.0300 INCHES NOMINAL IN |
| Thread Length | 0.5000 INCHES NOMINAL IN |
| Style Designator | CAM FOLLOWER, ADJUSTABLE |
| Material Document and Classification | HYTREL,FSCM 60380 MFR REF SINGLE MATERIAL RESPONSE SEAL |
| Overall Outside Diameter | 1.1240 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN |
| Features Provided | LUBRICATION HOLE AND LUBRICATION GROOVE |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Stud Length | 1.0000 INCHES NOMINAL IN |
| Alignment Type | RIGID |
| Surface Treatment | CHROMIUM OUTER RING OUTSIDE DIAMETER |
| Surface Treatment | CADMIUM EXPOSED SURFACES OF STUD AND WASHER AS MOUNTED |
| Surface Treatment | CHROMIUM OUTER RING SIDES |
| Seal Quantity | 2 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OUTER RING |
| Material | STEEL STUD |
| Material | STEEL END PLATE |
| Material | STEEL ROLLER |
| Material | RUBBER POLYESTER URETHANE CLASS AU SEAL |
| Thread Series Designator | UNF |
| Stud Diameter | 0.4375 INCHES MINIMUM AND 0.4385 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 4M278BE18 PRIMARY | Rbc Aircraft Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| CRSBE18CP | 5/9 Secondary reference Timken Co Div the Timken Company |
| 1M2788E18 | 5/9 Secondary reference Timken Aerospace, Inc Dba Torrington Product |
| CRSBE18CP | 5/1 Secondary reference Rbc Aircraft Products, Inc. |
| 4M278BE18 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| CRSBE18CP | 5/9 Secondary reference Timken Aerospace, Inc Dba Torrington Product |
| 4M278 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 3110-01-220-0265 is a Cam Follower,needle Bearing, manufactured by Rbc Aircraft Products, Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-220-0265 has 1 manufacturer part number on file: 4M278BE18 (Rbc Aircraft Products, Inc.).
Key specifications for 4M278BE18: Cam End Diameter: 0.6250 INCHES NOMINAL IN; Bearing Seal Type: CONTACT; Outer Ring Width: 0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN; Eccentricity: 0.0300 INCHES NOMINAL IN. 26 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.