The Plug,hydraulic Master Cylinder, cataloged under National Stock Number 1630-01-173-9684, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1630-01-173-9684 |
| Item Name | Plug,hydraulic Master Cylinder |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Status | ACTIVE |
| FSC Application Data | CYLINDER ASSEMBLY,HYDRAULIC BRAKE,MASTER |
| General Characteristics Item Description | LENGTH IS 0.690 IN.;DIAMETER IS 0.495 IN. MIN AND 0.498 IN. MAX;CENTER HOLE IS 0.190 IN. DIAMETER,24 UNC BY 0.375 MIN FULL THREAD,0.020 BY 45 DEGREES COUNTERSUNK;MADE FROM ALUMINUM ALLOY ROD,6061-0 PER QQ-A-225/8 IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 8341182-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1630-01-173-9684 is a Plug,hydraulic Master Cylinder, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
Key specifications for 1630-01-173-9684: FSC Application Data: CYLINDER ASSEMBLY,HYDRAULIC BRAKE,MASTER; General Characteristics Item Description: LENGTH IS 0.690 IN.;DIAMETER IS 0.495 IN. MIN AND 0.498 IN. MAX;CENTER HOLE IS 0.190 IN. DIAMETER,24 UNC BY 0.375 MIN FULL THREAD,0.020 BY 45 DEGREES COUNTERSUNK;MADE FROM ALUMINUM ALLOY ROD,6061-0 PER QQ-A-225/8 IN; End Item Identification: T-33 AIRCRAFT. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.