The Support,knee, cataloged under National Stock Number 6515-01-280-1859, is classified within Federal Supply Class 6515 (Medical and Surgical Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Middleton Holdings Llc. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6515-01-280-1859 |
| Primary Part Number | CP-21 |
| Item Name | Support,knee |
| FSC / FSG | 6515 / 65 — Medical and Surgical Instruments, Equipment, and Supplies |
| Manufacturer | Middleton Holdings Llc |
| Status | ACTIVE |
| Design Designation | CHO-PAT |
| Size Designation | X-LARGE |
| Material | COTTON COVER |
| Material | RUBBER FILLING |
| Usage Location | EITHER KNEE |
| 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 |
|---|---|
| CP-21 PRIMARY | Middleton Holdings Llc (USA) |
| Reference | Meaning |
|---|---|
| 88-3-14-51 AH | 5/1 Secondary reference Air Force Medical Logistics Office |
NSN 6515-01-280-1859 is a Support,knee, manufactured by Middleton Holdings Llc, classified under FSC 6515, Medical and Surgical Instruments, Equipment, and Supplies. Status: active.
NSN 6515-01-280-1859 has 1 manufacturer part number on file: CP-21 (Middleton Holdings Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-388-4707, 5315-01-541-5194. Verify interchangeability with system specifications before substitution.
Key specifications for CP-21: Overall Length: 16.500 INCHES NOMINAL IN; Design Designation: CHO-PAT; Size Designation: X-LARGE; Special Features: STRAP DESIGN; STRAP HELPS GUIDE THE KNEECAP TO BEND/STRAIGHTEN; MAY BE WORN OVER KNEE LENGTH SOCKS; FOR ORTHOPEDIC SURGEONS,PHYSICAL THERAPISTS/PATIENTS. 5 specifications are 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.