The Sleeve and Spacer Assembly, cataloged under National Stock Number 1660-00-522-5953, 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 Fdh Defense Aftermarket, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-522-5953 |
| Primary Part Number | 511626 |
| Item Name | Sleeve and Spacer Assembly |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Fdh Defense Aftermarket, Llc |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF 511602 SLEEVE 1; 511614 SPACER 1;69950-3S PIN 6;SPACER CENTERED 1.400 IN. FROM END OF SLEEVE 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 |
|---|---|
| 511626 PRIMARY | Fdh Defense Aftermarket, Llc (USA) |
| Reference | Meaning |
|---|---|
| 511626 | 5/9 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
| 511626 | 5/9 Secondary reference Alek Industries Inc |
| 511626 | 5/9 Secondary reference Lewis Machine, Llc |
NSN 1660-00-522-5953 is a Sleeve and Spacer Assembly, manufactured by Fdh Defense Aftermarket, Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-522-5953 has 1 manufacturer part number on file: 511626 (Fdh Defense Aftermarket, Llc).
Key specifications for 511626: General Characteristics Item Description: CONSISTS OF 511602 SLEEVE 1; 511614 SPACER 1;69950-3S PIN 6;SPACER CENTERED 1.400 IN. FROM END OF SLEEVE 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 1660-00-522-5953 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.