The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-053-3603, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Mpb Corporation Dba Mpb Corp. Government technical data includes 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-053-3603 |
| Primary Part Number | SB1555-102 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corporation Dba Mpb Corp |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Bearing Seal Type | CONTACT |
| Internal Clearance | 0.0170 INCHES MINIMUM RADIAL AND 0.0290 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Bearing Preload Designation | HEAVY |
| Criticality Code Justification | ABXV AND ADGA |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Overall Outside Diameter | 15.4984 INCHES MINIMUM AND 15.5000 INCHES MAXIMUM IN |
| Load Direction | RADIAL |
| Seal Quantity | 2 |
| Standard Tolerance Designation | ABEC NO.1 |
| Bore Diameter | 13.9984 INCHES MINIMUM AND 14.0000 INCHES MAXIMUM IN |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | RUBBER SYNTHETIC SEAL |
| Material | GREASE LUBRICATION |
| Material | PLASTIC PHENOLIC RETAINER |
| Material | STEEL BALL |
| Lubrication Material Document and Classification | MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE |
| 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 |
|---|---|
| SB1555-102 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| SB1555-102 PRIMARY | Mpb Corporation Dba Mpb Corp (USA) |
NSN 3110-01-053-3603 is a Bearing,ball,duplex, manufactured by Mpb Corporation Dba Mpb Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-053-3603 has 2 manufacturer part numbers on file: SB1555-102 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), SB1555-102 (Mpb Corporation Dba Mpb Corp).
Key specifications for SB1555-102: Retainer Fabrication Method: MACHINED; Bearing Seal Type: CONTACT; Internal Clearance: 0.0170 INCHES MINIMUM RADIAL AND 0.0290 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND. 19 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.