The Parts Kit,seal Replacement,mecha, cataloged under National Stock Number 1660-00-111-3556, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-111-3556 |
| Item Name | Parts Kit,seal Replacement,mecha |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Component Quantity | 30 |
| Supply Items and Quantities | 5331-00-606-6958 O-RING 1; 5331-00-027-3307 O-RING 1; 5330-00-851-5402 PACKING,PREFORMED 1; 5331-00-825-9211 O-RING 1; 5331-00-983-9258 O-RING 1; 5331-00-530-3394 O-RING 2; 5331-00-185-0089 O-RING 1; 4730-00-592-9557 RESTRICTOR,FLUID FLOW 1; 1660-00-807-8882 STEM,VALVE 1; 5310-00-833-7915 WASHER,FLAT 1; 1660-00-402-8434 BODY,VALVE 1; 1660-00-402-8432 DIAPHRAGM,VALVE,FLAT 1; 1660-00-242-5928 DIAPHRAGM AND PLATE,REGULATOR 1; 5340-00-826-5692 CAP-PLUG,PROTECTIVE,DUST AND MOISTURE SE 1; 1660-00-242-5929 DIAPHRAGM,BLINKER 1; 5330-01-100-3295 GASKET 1; 5330-00-168-5991 GASKET 1; 5330-00-168-5992 GASKET 1; 5331-01-184-8207 O-RING 1; 5340-01-526-4576 NOSE INTERLOCK BRACKET 1; 5330-00-530-2317 PACKING,PREFORMED 1; 5331-00-530-2312 O-RING 1; 5330-00-530-2307 GASKET 1;5330-00-530-2308 GASKET 1; 5330-00-551-2447 GASKET 1; 5331-00-663-6893 O-RING 1; 1660-00-653-0163 DIAPHRAGM 1; 5331-00-576-8536 O-RING 2 |
| End Item Name | DEMAND OXYGEN REGULATOR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1601588-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-111-3556 is a Parts Kit,seal Replacement,mecha, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-00-111-3556: Component Quantity: 30; Supply Items and Quantities: 5331-00-606-6958 O-RING 1; 5331-00-027-3307 O-RING 1; 5330-00-851-5402 PACKING,PREFORMED 1; 5331-00-825-9211 O-RING 1; 5331-00-983-9258 O-RING 1; 5331-00-530-3394 O-RING 2; 5331-00-185-0089 O-RING 1; 4730-00-592-9557 RESTRICTOR,FLUID FLOW 1; 1660-00-807-8882 STEM,VALVE 1; 5310-00-833-7915 WASHER,FLAT 1; 1660-00-402-8434 BODY,VALVE 1; 1660-00-402-8432 DIAPHRAGM,VALVE,FLAT 1; 1660-00-242-5928 DIAPHRAGM AND PLATE,REGULATOR 1; 5340-00-826-5692 CAP-PLUG,PROTECTIVE,DUST AND MOISTURE SE 1; 1660-00-242-5929 DIAPHRAGM,BLINKER 1; 5330-01-100-3295 GASKET 1; 5330-00-168-5991 GASKET 1; 5330-00-168-5992 GASKET 1; 5331-01-184-8207 O-RING 1; 5340-01-526-4576 NOSE INTERLOCK BRACKET 1; 5330-00-530-2317 PACKING,PREFORMED 1; 5331-00-530-2312 O-RING 1; 5330-00-530-2307 GASKET 1;5330-00-530-2308 GASKET 1; 5330-00-551-2447 GASKET 1; 5331-00-663-6893 O-RING 1; 1660-00-653-0163 DIAPHRAGM 1; 5331-00-576-8536 O-RING 2; End Item Name: DEMAND OXYGEN REGULATOR. 3 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.