The Pedestal,valve Guide, cataloged under National Stock Number 1660-01-020-8688, 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 Div Aerospace-Tucson. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-020-8688 |
| Primary Part Number | 139551-1 |
| Item Name | Pedestal,valve Guide |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| General Characteristics Item Description | 2.750 IN. LG,0.770 IN. BODY OD,0.509 IN. ID,USED ON P/N 130376-1-1 REGULATOR IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 139551-1 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 139551-1 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 1660-01-020-8688 is a Pedestal,valve Guide, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-020-8688 has 1 manufacturer part number on file: 139551-1 (Honeywell International, Inc Div Aerospace-Tucson).
Key specifications for 139551-1: General Characteristics Item Description: 2.750 IN. LG,0.770 IN. BODY OD,0.509 IN. ID,USED ON P/N 130376-1-1 REGULATOR 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.
NSN 1660-01-020-8688 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.