The Four Legged Chamber, cataloged under National Stock Number 4540-01-513-8154, is classified within Federal Supply Class 4540 (Waste Disposal Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4540-01-513-8154 |
| Primary Part Number | 593-7556822 ASSY 99 |
| Item Name | Four Legged Chamber |
| FSC / FSG | 4540 / 45 — Waste Disposal Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Overall Diameter | 20.900 INCHES MINIMUM AND 21.190 INCHES MAXIMUM IN |
| Accessory Components and Quantity | HELICAL COIL THREAD INSERT, SST 18-8, .250-20UNC-2B X .38 LG 2; HELICAL COIL THREAD INSERT, SST 18-8, .138-32UNC-2B X .276 LG 2 |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 593-7556811 PC 13 | Naval Sea Systems Command (USA) |
| 593-7556822 ASSY 99 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4540-01-513-8154 is a Four Legged Chamber, manufactured by Naval Sea Systems Command, classified under FSC 4540, Waste Disposal Equipment. Status: active.
NSN 4540-01-513-8154 has 2 manufacturer part numbers on file: 593-7556811 PC 13 (Naval Sea Systems Command), 593-7556822 ASSY 99 (Naval Sea Systems Command).
Key specifications for 593-7556822 ASSY 99: Overall Height: 27.750 INCHES NOMINAL IN; Overall Diameter: 20.900 INCHES MINIMUM AND 21.190 INCHES MAXIMUM IN; Accessory Components and Quantity: HELICAL COIL THREAD INSERT, SST 18-8, .250-20UNC-2B X .38 LG 2; HELICAL COIL THREAD INSERT, SST 18-8, .138-32UNC-2B X .276 LG 2; Special Features: FABRICATED BY SAND CASTING ALUMINUM ALLOY GRADE 356-T51 PER ASTM B26 OR BY ROLLING AND WELDING PLATE MATERIAL ASTM B209, ALLOY 6061; FOUR LEGS ARE FORMED AT BOTTOM (INCLUDED IN OVERALL HEIGHT) - SEE DRAWING FOR DETAILS. 4 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.