The Plate,retaining,bearing, cataloged under National Stock Number 3110-01-263-4372, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-263-4372 |
| Primary Part Number | 520-4863666 ITEM 3 |
| Item Name | Plate,retaining,bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Countersink Diameter | 0.530 INCHES NOMINAL IN |
| Bolt Circle Hole Quantity | 8 |
| Mounting Hole Type | ROUND, THREADED, COUNTERSUNK |
| Mounting Hole Arrangement Style | SINGLE BOLT HOLE CIRCLE |
| Style Designator | ROUND |
| Material Document and Classification | QQ-C-390,TYPE 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.500 INCHES IN |
| Mounting Bolt Circle Diameter | 20.125 INCHES NOMINAL IN |
| Countersink Angle | 90.0 DEGREES NOMINAL |
| Thread Quantity Per Inch | 13 |
| Material | COPPER ALLOY 903 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 520-4863666 ITEM 3 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 520-4863666 ITEM 3 | 3/9 Design control — primary reference U.S. Government activity |
| 4863666-0003 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3110-01-263-4372 is a Plate,retaining,bearing, manufactured by Derbyshire Machine & Tool Co, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-263-4372 has 1 manufacturer part number on file: 520-4863666 ITEM 3 (Derbyshire Machine & Tool Co).
Key specifications for 520-4863666 ITEM 3: Countersink Diameter: 0.530 INCHES NOMINAL IN; Bolt Circle Hole Quantity: 8; Mounting Hole Type: ROUND, THREADED, COUNTERSUNK; Mounting Hole Arrangement Style: SINGLE BOLT HOLE CIRCLE. 12 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.