The Filter,leukocyte Reduction, cataloged under National Stock Number 6515-01-537-8537, 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 Fresenius Kabi, Llc. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: PG.
| Parameter | Value |
|---|---|
| NSN | 6515-01-537-8537 |
| Primary Part Number | 4C2491 |
| Item Name | Filter,leukocyte Reduction |
| FSC / FSG | 6515 / 65 — Medical and Surgical Instruments, Equipment, and Supplies |
| Manufacturer | Fresenius Kabi, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | PG |
| Part Number | Manufacturer |
|---|---|
| 4C2491 | Cenmed Enterprises Inc (USA) |
| 4C2491 | Fenwal, Inc. (USA) |
| 4C2491 PRIMARY | Fresenius Kabi, Llc (USA) |
| Reference | Meaning |
|---|---|
| MIL-STD-129P W/CHG 2 | 5/1 Secondary reference U.S. Government activity |
| 06-0123 | 5/1 Secondary reference U.S. Government activity |
| SEPACELL R500II RED BLOOD | 5/9 Secondary reference Baxter Healthcare Corporation Div Medication Delivery |
| 4C2491 | 5/9 Secondary reference Baxter Healthcare Corporation Div Medication Delivery |
NSN 6515-01-537-8537 is a Filter,leukocyte Reduction, manufactured by Fresenius Kabi, Llc, classified under FSC 6515, Medical and Surgical Instruments, Equipment, and Supplies. Status: active.
NSN 6515-01-537-8537 has 3 manufacturer part numbers on file: 4C2491 (Cenmed Enterprises Inc), 4C2491 (Fenwal, Inc.), 4C2491 (Fresenius Kabi, Llc).
4 possible matches (shared part number, not a government interchangeability claim): 6550-01-537-9324, 6515-01-538-2101, 6515-01-538-5709. Verify interchangeability with system specifications before substitution.
Key specifications for 4C2491: Special Features: FILTER W/ATTACHED Y-ADMINISTRATION SET; FILTER AVERAGES LESS THAN 2 X 10 (5TH POWER)RESIDUAL LEUKOCYTES PER UNIT WITH AN AVERAGE RED CELL RECOVERY GREATER THAN 90%; FILTER IS SINGLE USE AND LATEX FREE; REDUCES THE LEVEL OF LEUKOCYTES AND MICROAGGREGATES FROM ONE UNIT OF PACKED RED BLOOD CELLS OR WHOLE BLOOD; CASE OF 18; SEPACELL R500II; Part Name Assigned by Controlling Agency: FILTER LEUKOREDUCTION W/Y-ADMINISTRATION F/RBC 18S. 0 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.