The Bearing,ball,airframe, cataloged under National Stock Number 3110-01-472-3985, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Timken Co Div the Timken Company. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-472-3985 |
| Primary Part Number | KP21B |
| Item Name | Bearing,ball,airframe |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Timken Co Div the Timken Company |
| Status | ACTIVE |
| Outer Ring Width | 9.5 MILLIMETERS NOMINAL MM |
| Style Designator | SINGLE ROW, EXTERNAL SELF ALIGNING, W/ALIGNING RING |
| Overall Outside Diameter | 52.4 MILLIMETERS NOMINAL MM |
| Load Direction | RADIAL |
| Bore Diameter | 33.4 MILLIMETERS NOMINAL MM |
| Inner Ring Width | 11.1 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| KP21B PRIMARY | Timken Co Div the Timken Company (USA) |
NSN 3110-01-472-3985 is a Bearing,ball,airframe, manufactured by Timken Co Div the Timken Company, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-472-3985 has 1 manufacturer part number on file: KP21B (Timken Co Div the Timken Company).
Key specifications for KP21B: Outer Ring Width: 9.5 MILLIMETERS NOMINAL MM; Style Designator: SINGLE ROW, EXTERNAL SELF ALIGNING, W/ALIGNING RING; Overall Outside Diameter: 52.4 MILLIMETERS NOMINAL MM; Load Direction: RADIAL. 6 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.