The Adapter,compressed Gas Cylinder, cataloged under National Stock Number 1660-01-504-9320, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is B/e Aerospace, Inc. Dba Interturbine Div Oxygen & PSU Systems. Government technical data includes 14 specifications, 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-504-9320 |
| Primary Part Number | 173784 |
| Item Name | Adapter,compressed Gas Cylinder |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | B/e Aerospace, Inc. Dba Interturbine Div Oxygen & PSU Systems |
| Status | ACTIVE |
| Wrenching Facility | NOT INCLUDED |
| Union End | NOT INCLUDED |
| First End Thread Direction | RIGHT-HAND |
| First End Style Designator | FLARED |
| First End Thread Size | 17/16-20 |
| First End Thread Series/type Designator | UNF |
| Second End Thread Direction | RIGHT-HAND |
| Gas for Which Designed | OXYGEN |
| Second End Style Designator | SWIVEL NUT, GAS |
| Second End Thread Size | 3/8-24 |
| First End Reduced Passage Inside Diameter | 0.250 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL GAS CYLINDER |
| Material | COPPER ALLOY |
| Second End Thread Series/type Designator | UNF |
| 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 |
|---|---|
| 173784 PRIMARY | B/e Aerospace, Inc. Dba Interturbine Div Oxygen & PSU Systems (USA) |
NSN 1660-01-504-9320 is a Adapter,compressed Gas Cylinder, manufactured by B/e Aerospace, Inc. Dba Interturbine Div Oxygen & PSU Systems, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-504-9320 has 1 manufacturer part number on file: 173784 (B/e Aerospace, Inc. Dba Interturbine Div Oxygen & PSU Systems).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-512-5186. Verify interchangeability with system specifications before substitution.
Key specifications for 173784: Wrenching Facility: NOT INCLUDED; Union End: NOT INCLUDED; First End Thread Direction: RIGHT-HAND; First End Style Designator: FLARED. 14 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.