The Valve,seat Half, cataloged under National Stock Number 1660-00-167-4975, 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 Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-167-4975 |
| Primary Part Number | B49C35 |
| Item Name | Valve,seat Half |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| General Characteristics Item Description | CRES MATERIAL QQ-S-764 TYPE 303 OR AMS 5640; 0.280 IN. O/A LG;NO. 8/0.164 IN./-32 THD SIZE; 0.250 IN. W ACROSS FLATS IN |
| 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 |
|---|---|
| B49C35 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| B49C35 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| B49C35 | 5/9 Secondary reference Grimes Aerospace Company |
NSN 1660-00-167-4975 is a Valve,seat Half, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-167-4975 has 2 manufacturer part numbers on file: B49C35 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), B49C35 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for B49C35: General Characteristics Item Description: CRES MATERIAL QQ-S-764 TYPE 303 OR AMS 5640; 0.280 IN. O/A LG;NO. 8/0.164 IN./-32 THD SIZE; 0.250 IN. W ACROSS FLATS IN. 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.