The Collar,air Conditioning-Heating, cataloged under National Stock Number 4520-01-333-1700, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-333-1700 |
| Primary Part Number | BML32505-10 |
| Item Name | Collar,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| Status | ACTIVE |
| Fitting Inside Diameter | 8.250 INCHES NOMINAL IN |
| Overall Diameter | 12.000 INCHES NOMINAL IN |
| Overall Thickness | 0.109 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Surface Treatment | CHROMATE ZINC |
| Material | STEEL |
| Fitting Overall Length | 2.125 INCHES NOMINAL 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 |
|---|---|
| BML32505-10 | Amz Alabama Inc. (USA) |
| BML32505-10 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| BML32505 | D/9 Drawing number reference only Bae Systems Land & Armaments L.p. |
NSN 4520-01-333-1700 is a Collar,air Conditioning-Heating, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-333-1700 has 2 manufacturer part numbers on file: BML32505-10 (Amz Alabama Inc.), BML32505-10 (Bae Systems Land & Armaments L.p.).
Key specifications for BML32505-10: Fitting Inside Diameter: 8.250 INCHES NOMINAL IN; Overall Diameter: 12.000 INCHES NOMINAL IN; Overall Thickness: 0.109 INCHES NOMINAL IN; Style Designator: ROUND. 7 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.