The Plate,retaining,bearing, cataloged under National Stock Number 3110-01-381-0133, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-381-0133 |
| Primary Part Number | 1210C3290 |
| Item Name | Plate,retaining,bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Mounting Hole Type | ROUND, UNTHREADED |
| Overall Thickness | 0.375 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Mounting Hole Diameter | 0.281 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | FLAT W/APERTURE |
| Outside Diameter | 4.920 INCHES NOMINAL IN |
| Aperture Diameter | 2.880 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 1210C3290 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 1210C3290 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 3110-01-381-0133 is a Plate,retaining,bearing, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-381-0133 has 1 manufacturer part number on file: 1210C3290 (Lockheed Martin Corporation Div Rms).
Key specifications for 1210C3290: Mounting Hole Type: ROUND, UNTHREADED; Overall Thickness: 0.375 INCHES NOMINAL IN; Style Designator: ROUND; Mounting Hole Diameter: 0.281 INCHES NOMINAL IN. 8 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.