The Block,adjustment, cataloged under National Stock Number 1660-00-591-5689, 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 Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-591-5689 |
| Primary Part Number | DYLZ431 |
| Item Name | Block,adjustment |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-351 2017-T4;ANODIZED MIL-A-8625;1.219 IN. LG;1.094 IN. W;0.469 IN. H;TWO 0.164-32 NC-3B THD HOLES;TWO 0.138-32 NC-3B THD HOLES;TWO 0.088 IN. DIA HOLES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DYLZ431 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 1660-00-591-5689 is a Block,adjustment, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-591-5689 has 1 manufacturer part number on file: DYLZ431 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for DYLZ431: General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-351 2017-T4;ANODIZED MIL-A-8625;1.219 IN. LG;1.094 IN. W;0.469 IN. H;TWO 0.164-32 NC-3B THD HOLES;TWO 0.138-32 NC-3B THD HOLES;TWO 0.088 IN. DIA HOLES 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 1660-00-591-5689 has DEMIL Code B. 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.