The Bearing,ball,track Roller, cataloged under National Stock Number 3110-00-159-9518, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Instruments and Flight Research, Inc.. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-00-159-9518 |
| Primary Part Number | 523552-1 |
| Item Name | Bearing,ball,track Roller |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Instruments and Flight Research, Inc. |
| Status | ACTIVE |
| Bearing Seal Type | CONTACT |
| Lubrication Material | GREASE |
| Outer Ring Width | 0.5700 INCHES NOMINAL IN |
| Crown Radius | 3.0300 INCHES NOMINAL IN |
| Style Designator | DOUBLE ROW RIGID, CROWNED OD INNER RING ENTENDED BOTH SIDES |
| Overall Outside Diameter | 1.2500 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES |
| Seal Quantity | 2 |
| Bore Diameter | 0.4375 INCHES NOMINAL IN |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | RUBBER SYNTHETIC SEAL |
| Material | STEEL BALL |
| Lubrication Material Document and Classification | MIL-23827 MIL SPEC SINGLE MATERIAL RESPONSE |
| Inner Ring Width | 0.6300 INCHES NOMINAL 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 |
|---|---|
| D7R48-3FS160 | Rbc Aircraft Products, Inc. (USA) |
| D7R48-3 | Rbc Aircraft Products, Inc. (USA) |
| 523552-1 PRIMARY | Instruments and Flight Research, Inc. (USA) |
| Reference | Meaning |
|---|---|
| D7R48-3 | 5/9 Secondary reference Timken Co Div the Timken Company |
| D7R48-3ANG25 | 5/9 Secondary reference Timken Co Div the Timken Company |
| D7R48-3FS160 | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3110-00-159-9518 is a Bearing,ball,track Roller, manufactured by Instruments and Flight Research, Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-159-9518 has 3 manufacturer part numbers on file: D7R48-3FS160 (Rbc Aircraft Products, Inc.), D7R48-3 (Rbc Aircraft Products, Inc.), 523552-1 (Instruments and Flight Research, Inc.).
Key specifications for 523552-1: Bearing Seal Type: CONTACT; Lubrication Material: GREASE; Outer Ring Width: 0.5700 INCHES NOMINAL IN; Crown Radius: 3.0300 INCHES NOMINAL IN. 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.