The Quick Disconnect Ho, cataloged under National Stock Number 4520-01-473-8422, 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 Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-473-8422 |
| Primary Part Number | BST-1-684 |
| Item Name | Quick Disconnect Ho |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division |
| Status | ACTIVE |
| General Characteristics Item Description | SPECIAL PROJECT SHA HEATER SPACE ARCTIC |
| 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 |
|---|---|
| BST-1-684 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division (USA) |
| Reference | Meaning |
|---|---|
| MIL-PRF-44494 | 4/1 Identification reference U.S. Government activity |
| BST-1-684 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4520-01-473-8422 is a Quick Disconnect Ho, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-473-8422 has 1 manufacturer part number on file: BST-1-684 (Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division).
Key specifications for BST-1-684: General Characteristics Item Description: SPECIAL PROJECT SHA HEATER SPACE ARCTIC. 1 specification is 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.