The Free Testosterone, cataloged under National Stock Number 6550-01-485-8556, is classified within Federal Supply Class 6550 (In Vitro Diagnostic Substances, Reagents, Test Kits and Sets) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Diagnostic Systems Laboratories, Inc Dba D S L. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6550-01-485-8556 |
| Primary Part Number | 4900-5 |
| Item Name | Free Testosterone |
| FSC / FSG | 6550 / 65 — In Vitro Diagnostic Substances, Reagents, Test Kits and Sets |
| Manufacturer | Diagnostic Systems Laboratories, Inc Dba D S L |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4900-5 PRIMARY | Diagnostic Systems Laboratories, Inc Dba D S L (USA) |
NSN 6550-01-485-8556 is a Free Testosterone, manufactured by Diagnostic Systems Laboratories, Inc Dba D S L, classified under FSC 6550, In Vitro Diagnostic Substances, Reagents, Test Kits and Sets. Status: active.
NSN 6550-01-485-8556 has 1 manufacturer part number on file: 4900-5 (Diagnostic Systems Laboratories, Inc Dba D S L).
1 possible match (shared part number, not a government interchangeability claim): 1005-01-602-2377. Verify interchangeability with system specifications before substitution.
Key specifications for 4900-5: Special Features: COATED TUBE RIA; SERUM; SENSITIVITY, 0.18 PG/ML; 1 HR AT 37 DEG. INCUBATION PERIOD; SHELF LIFE, 12 WKS.. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.