The Sizing Ring,seal,hydraulic Actua, cataloged under National Stock Number 4920-01-075-0503, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-075-0503 |
| Item Name | Sizing Ring,seal,hydraulic Actua |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Status | ACTIVE |
| Seal Accommodation Type | SMOOTH SURFACE |
| Hardness Rating | 62.0 ROCKWELL INTERNATIONAL MINIMUM AND 64.0 ROCKWELL INTERNATIONAL MAXIMUM |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| DAS-25106-19 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4920-01-075-0503 is a Sizing Ring,seal,hydraulic Actua, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
Key specifications for 4920-01-075-0503: Seal Accommodation Type: SMOOTH SURFACE; Hardness Rating: 62.0 ROCKWELL INTERNATIONAL MINIMUM AND 64.0 ROCKWELL INTERNATIONAL MAXIMUM; Special Features: FUNCTION-USED TO SIZE P/N 5900708-26 SEAL RING AFTER IT HAS BEEN STRETCHED FOR ASSEMBLY ON P/N5002735 VALVE SLEEVE DURING OVERHAUL OF THE ACCESSORY DRIVE GEARBOX; MATL-STEEL; WT.-1.0 LB; O/A DIM-1.625 IN DIA; 1.125 IN LG; COMPANY ASSIGNED NAME:DIE,(MISC); MADE FROM DRILL JIG BUSHING P/N H-88-12 LBS; End Item Identification: F16A/B ADG. 3 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.