The Spacer,diaphragm, cataloged under National Stock Number 1660-00-804-9228, 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 Northrop Grumman Systems Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1660-00-804-9228 |
| Primary Part Number | 859768-1 |
| Item Name | Spacer,diaphragm |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY 356-T430;ANODIZED EMS 241 TY 1 CL A;0.200 IN. THK;1.870 IN. DIA APERTURE;THREE 0.190 IN. DIA HOLES ON 2.500 IN. DIA BOLT CIRCLE;2.180 IN. OD EXCLUDING MTG EARS 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 |
|---|---|
| 859768-1 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 859768-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-804-9228 is a Spacer,diaphragm, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-804-9228 has 1 manufacturer part number on file: 859768-1 (Northrop Grumman Systems Corporation).
Key specifications for 859768-1: General Characteristics Item Description: ALUMINUM ALLOY 356-T430;ANODIZED EMS 241 TY 1 CL A;0.200 IN. THK;1.870 IN. DIA APERTURE;THREE 0.190 IN. DIA HOLES ON 2.500 IN. DIA BOLT CIRCLE;2.180 IN. OD EXCLUDING MTG EARS 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.