The Peep Sight Glass, cataloged under National Stock Number 4520-00-009-7328, 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 Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Peep Sight Glass |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global (CAGE 79466) |
| Parameter | Value |
|---|---|
| NSN | 4520-00-009-7328 |
| Primary Part Number | N78522A |
| Item Name | Peep Sight Glass |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
NSN 4520-00-009-7328 is a Peep Sight Glass, manufactured by Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-009-7328 has 2 manufacturer part numbers on file: N78522A (Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global), 78522 (Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global).
1 possible match (shared part number, not a government interchangeability claim): 6150-00-996-0573. Verify interchangeability with system specifications before substitution.
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.