The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-992-1012, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-992-1012 |
| Primary Part Number | S7BT2L4B-22-1NT |
| 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 |
| Criticality Code Justification | ZZZW |
| Style Designator | UNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE |
| Overall Outside Diameter | 4.3305 INCHES MINIMUM AND 4.3307 INCHES MAXIMUM IN |
| Departure From Cited Document | ANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE |
| Nondefinitive Spec/std Data | 134 TYPE AND 2 CLASS |
| Load Direction | ANGULAR |
| Bore Diameter | 1.9683 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Material | GREASE LUBRICATION |
| Lubrication Material Document and Classification | D0D-G-24508 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 |
|---|---|
| S7BT2L4B-22-1NT | Naval Inventory Control Point Mechanicsburg (USA) |
| M17931-A017NT | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| M17931-A017 | 5/1 Secondary reference Rbc Aircraft Products, Inc. |
| S7BT2L4B-22-1 | 5/1 Secondary reference Cpi Satcom and Antenna Technologies Inc |
| 30310DTL7077 | 5/9 Secondary reference General Motors Corp Delco Moraine Ndh Div |
| 30310DTL7077 | 5/9 Secondary reference General Motors Corp |
| M17931-A017 | 3/1 Design control — primary reference Timken Co Div the Timken Company |
| 999999K179 | 5/9 Secondary reference U.S. Government activity |
| MILB17931NT | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| MILB17931 | 4/1 Identification reference U.S. Government activity |
| 7310DSXX00X015B13DG655B | 5/9 Secondary reference Skf Usa Inc. |
| M17931-A017 | 5/1 Secondary reference Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation |
NSN 3110-00-992-1012 is a Bearing,ball,duplex, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-992-1012 has 2 manufacturer part numbers on file: S7BT2L4B-22-1NT (Naval Inventory Control Point Mechanicsburg), M17931-A017NT (Naval Inventory Control Point Mechanicsburg).
Key specifications for S7BT2L4B-22-1NT: Retainer Fabrication Method: PRESSED; Internal Fit-Up Designation: TIGHT; Surface Finish: GROUND; Criticality Code Justification: ZZZW. 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 3110-00-992-1012 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.