The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-283-7451, 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 19 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-283-7451 |
| Primary Part Number | 901788-1C |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Timken Aerospace, Inc Dba Torrington Product |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Bearing Seal Type | CONTACT |
| Bearing Preload Rating | 50.0 POUNDS NOMINAL LBS |
| Internal Fit-Up Designation | STANDARD |
| Surface Finish | GROUND |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Material Document and Classification | UNABLE TO DECODE |
| Overall Outside Diameter | 3.5000 INCHES NOMINAL IN |
| Load Direction | ANGULAR |
| Seal Quantity | 1 |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 3.0000 INCHES NOMINAL IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | GREASE LUBRICATION |
| Material | STEEL COMP 440C BALL |
| Material | PLASTIC RETAINER |
| Material | RUBBER FLUOROSILICONE CLASS FQ SEAL |
| 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 |
|---|---|
| 901788-1C PRIMARY | Timken Aerospace, Inc Dba Torrington Product (USA) |
| 901788-1C PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| 901788-1C PRIMARY | Mpb Corporation Dba Mpb Corp (USA) |
| Reference | Meaning |
|---|---|
| AVYN48WOPP3CRVA1860 | 5/9 Secondary reference Timken Co Div the Timken Company |
| 3TARZ48-56-22 | 5/1 Secondary reference Mpb Corporation Dba Mpb Corp |
| T595 | 5/1 Secondary reference Mpb Corp Div Timken Super Precision |
| 901788-1C | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 3110-00-283-7451 is a Bearing,ball,duplex, manufactured by Timken Aerospace, Inc Dba Torrington Product, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-283-7451 has 3 manufacturer part numbers on file: 901788-1C (Timken Aerospace, Inc Dba Torrington Product), 901788-1C (Mpb Corp Div Timken Super Precision), 901788-1C (Mpb Corporation Dba Mpb Corp).
2 possible matches (shared part number, not a government interchangeability claim): 5120-00-832-3338, 5130-01-290-3065. Verify interchangeability with system specifications before substitution.
Key specifications for 901788-1C: Retainer Fabrication Method: MACHINED; Bearing Seal Type: CONTACT; Bearing Preload Rating: 50.0 POUNDS NOMINAL LBS; Internal Fit-Up Designation: STANDARD. 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.