The Bearing,ball,annular, cataloged under National Stock Number 3110-00-321-7591, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Woodward Hrt, Inc. Dba Woodward Hrt Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-00-321-7591 |
| Primary Part Number | 3151-252 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Woodward Hrt, Inc. Dba Woodward Hrt Inc |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Internal Clearance | 0.0008 INCHES MINIMUM RADIAL AND 0.0018 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Material Document and Classification | AMS ASSN STD SINGLE MATERIAL RESPONSE BALL |
| Material Document and Classification | AMS ASSN STD SINGLE MATERIAL RESPONSE INNER RING |
| Material Document and Classification | AMS ASSN STD SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | ASTM ASSN STD ALL MATERIAL RESPONSES RETAINER |
| Overall Outside Diameter | 28.00 MILLIMETERS NOMINAL MM |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Standard Tolerance Designation | ABEC NO.3 |
| Bore Diameter | 15.00 MILLIMETERS NOMINAL MM |
| Material | STEEL COMP E52100 BALL |
| Material | STEEL COMP E52100 OUTER RING |
| Material | STEEL COMP E52100 INNER RING |
| Material | COPPER ALLOY 932 OR COPPER ALLOY 937 OR COPPER ALLOY 938 OR COPPER ALLOY 864 OR COPPER ALLOY 935 OR COPPER ALLOY 943 RETAINER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3151-252 | Mpb Corporation Dba Mpb Corp (USA) |
| 3151-252 PRIMARY | Woodward Hrt, Inc. Dba Woodward Hrt Inc (USA) |
| Reference | Meaning |
|---|---|
| HDB002P3L02 | 5/1 Secondary reference Mpb Corporation Dba Mpb Corp |
| M9302KMBR | 5/1 Secondary reference Timken Co Div the Timken Company |
| 3151-252 | 5/2 Secondary reference U.S. Government activity |
NSN 3110-00-321-7591 is a Bearing,ball,annular, manufactured by Woodward Hrt, Inc. Dba Woodward Hrt Inc, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-321-7591 has 2 manufacturer part numbers on file: 3151-252 (Mpb Corporation Dba Mpb Corp), 3151-252 (Woodward Hrt, Inc. Dba Woodward Hrt Inc).
Key specifications for 3151-252: Retainer Fabrication Method: MACHINED; Internal Clearance: 0.0008 INCHES MINIMUM RADIAL AND 0.0018 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND; Style Designator: NON-LOADING GROOVE, NON-SEPARABLE. 17 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.
NSN 3110-00-321-7591 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.