The Bearing,roller,track Roller, cataloged under National Stock Number 3110-01-503-0388, 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 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-503-0388 |
| Primary Part Number | 38950-00909-102 |
| Item Name | Bearing,roller,track Roller |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Rbc Aircraft Products, Inc. |
| Status | ACTIVE |
| Outer Ring Width | 0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Surface Treatment Document and Classification | QQ-C-320 FED SPEC SINGLE TREATMENT RESPONSE OUTER RING SIDES |
| Surface Treatment Document and Classification | QQ-C-320 FED SPEC SINGLE TREATMENT RESPONSE ROLLER |
| Style Designator | TRACK ROLLER |
| Material Document and Classification | AMS-6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Overall Outside Diameter | 1.1260 INCHES MINIMUM AND 1.1270 INCHES MAXIMUM IN |
| Specification/standard Data | 78286-MIL-B-3990 GOVERNMENT SPECIFICATION |
| Surface Treatment | CADMIUM OVERALL |
| Surface Treatment | CHROMATE OUTER RING SIDES |
| Surface Treatment | CHROMATE ROLLER |
| Bore Diameter | 0.3121 INCHES MINIMUM AND 0.3127 INCHES MAXIMUM IN |
| Material | STEEL COMP E52100 OVERALL |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.6775 INCHES MINIMUM AND 0.6925 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 |
|---|---|
| 38950-00909-102 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 38950-00909-102 PRIMARY | Rbc Aircraft Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 38950-00909-102 | 5/9 Secondary reference Roller Bearing Company of America, Inc. |
| 38950-00909 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| 38950-00909-102 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3110-01-503-0388 is a Bearing,roller,track Roller, manufactured by Rbc Aircraft Products, Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-503-0388 has 2 manufacturer part numbers on file: 38950-00909-102 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 38950-00909-102 (Rbc Aircraft Products, Inc.).
Key specifications for 38950-00909-102: Outer Ring Width: 0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Surface Treatment Document and Classification: QQ-C-320 FED SPEC SINGLE TREATMENT RESPONSE OUTER RING SIDES; Surface Treatment Document and Classification: QQ-C-320 FED SPEC SINGLE TREATMENT RESPONSE ROLLER. 15 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.