The Plate,retaining,bearing, cataloged under National Stock Number 3110-01-073-6557, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 18 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 | 3110-01-073-6557 |
| Primary Part Number | 642AS2855 |
| Item Name | Plate,retaining,bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Width Across Flats | 2.000 INCHES NOMINAL IN |
| Minor Thickness | 0.087 INCHES NOMINAL IN |
| Bolt Circle Hole Quantity | 8 |
| Mounting Hole Type | ROUND, UNTHREADED, COUNTERBORED |
| Counterbore Diameter | 1.751 INCHES MINIMUM AND 1.753 INCHES MAXIMUM IN |
| Counterbore Depth | 0.108 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Mounting Hole Arrangement Style | SINGLE BOLT HOLE CIRCLE |
| Overall Thickness | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN |
| Style Designator | TWO FLATS |
| Material Document and Classification | QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.102 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | COUNTERBORED W/ APERTURE |
| Outside Diameter | 2.160 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN |
| Aperture Diameter | 1.460 INCHES MINIMUM AND 1.470 INCHES MAXIMUM IN |
| Counterbore Depth | 0.450 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.180 INCHES NOMINAL IN |
| Mounting Bolt Circle Diameter | 1.808 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 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 |
|---|---|
| 642AS2855 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 3110-01-073-6557 is a Plate,retaining,bearing, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-073-6557 has 1 manufacturer part number on file: 642AS2855 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 642AS2855: Width Across Flats: 2.000 INCHES NOMINAL IN; Minor Thickness: 0.087 INCHES NOMINAL IN; Bolt Circle Hole Quantity: 8; Mounting Hole Type: ROUND, UNTHREADED, COUNTERBORED. 18 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.