The Block,air Gap, cataloged under National Stock Number 6685-00-342-3849, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Horizon Aerospace Llc Dba Magnetics Division. 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.
| Item Name | Block,air Gap |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Horizon Aerospace Llc Dba Magnetics Division (CAGE 35918) |
| Parameter | Value |
|---|---|
| NSN | 6685-00-342-3849 |
| Primary Part Number | 21-1533 |
| Item Name | Block,air Gap |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Horizon Aerospace Llc Dba Magnetics Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| 21-1533 PRIMARY | Horizon Aerospace Llc Dba Magnetics Division (USA) |
NSN 6685-00-342-3849 is a Block,air Gap, manufactured by Horizon Aerospace Llc Dba Magnetics Division, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-342-3849 has 1 manufacturer part number on file: 21-1533 (Horizon Aerospace Llc Dba Magnetics Division).
1 possible match (shared part number, not a government interchangeability claim): 5910-01-243-8188. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). 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.