The Washer,recessed, cataloged under National Stock Number 5310-01-196-0253, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-196-0253 |
| Primary Part Number | 363B123-1 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 32.0 MICROINCHES INNER |
| Surface Finish | 63.0 MICROINCHES TOP |
| Top Recess Diameter | 0.4150 INCHES MINIMUM AND 0.4155 INCHES MAXIMUM IN |
| Bottom Recess Diameter | 0.4150 INCHES MINIMUM AND 0.4155 INCHES MAXIMUM IN |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | BEARIUM,GRADE B-10,FSCM 85373 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.187 INCHES NOMINAL IN |
| Material Thickness | 0.151 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.3750 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 363B123-1 PRIMARY | Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division (USA) |
| Reference | Meaning |
|---|---|
| 363B123-1 | 5/9 Secondary reference Eaton Motor Site |
NSN 5310-01-196-0253 is a Washer,recessed, manufactured by Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-196-0253 has 1 manufacturer part number on file: 363B123-1 (Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division).
Key specifications for 363B123-1: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 32.0 MICROINCHES INNER; Surface Finish: 63.0 MICROINCHES TOP; Top Recess Diameter: 0.4150 INCHES MINIMUM AND 0.4155 INCHES MAXIMUM IN. 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.
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.