The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-992-1018, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 13 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through both NSN and commercial part number lookups. 21 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-992-1018 |
| Primary Part Number | M17931-A041NT |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Internal Fit-Up Designation | TIGHT |
| Surface Finish | GROUND |
| Bearing Preload Designation | MEDIUM |
| Criticality Code Justification | ZZZW |
| Overall Outside Diameter | 7.8737 INCHES MINIMUM AND 7.8740 INCHES MAXIMUM IN |
| Departure From Cited Document | ANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE |
| Nondefinitive Spec/std Data | 134 TYPE AND 1 CLASS |
| Load Direction | ANGULAR |
| Bore Diameter | 3.7399 INCHES MINIMUM AND 3.7402 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Material | GREASE LUBRICATION |
| Lubrication Material Document and Classification | MIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| M17931-A041NT | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| M17931-A041 | 5/1 Secondary reference Timken Co Div the Timken Company |
| 30319DTX7077 | 5/9 Secondary reference General Motors Corp Delco Moraine Ndh Div |
| 7319-DBNT3 | D/9 Drawing number reference only Naval Inventory Control Point Mechanicsburg |
| 7319-DBNT3NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 30319DTX7077 | 5/9 Secondary reference Skf Usa Inc. |
| MIL-B-17931 | 4/1 Identification reference U.S. Government activity |
| 79999003 | 5/9 Secondary reference U.S. Government activity |
| 134-09503-8888 | 5/9 Secondary reference U.S. Government activity |
| 7319DSXX00X015B13DG655CNT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| M17931-A041 | 5/1 Secondary reference Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation |
| 999999K185NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| MIL-B-17931NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 134-09503-8888NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 999999K185 | 5/9 Secondary reference U.S. Government activity |
| 7319DSXX00X015B13DG655C | 5/9 Secondary reference Skf Usa Inc. |
| 30319DTX7077NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 7319-DB | 5/9 Secondary reference Skf Usa Inc. |
| 79999003NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 7319-DBNT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 17931A041NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 3110-00-992-1018 is a Bearing,ball,duplex, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-992-1018 has 1 manufacturer part number on file: M17931-A041NT (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 3110-00-998-7775. Verify interchangeability with system specifications before substitution.
Key specifications for M17931-A041NT: Retainer Fabrication Method: PRESSED; Internal Fit-Up Designation: TIGHT; Surface Finish: GROUND; Bearing Preload Designation: MEDIUM. 13 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 3110-00-992-1018 has DEMIL Code D. 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.