The Holder,microtube, cataloged under National Stock Number 6640-01-573-9912, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. The manufacturer of record is Charm Sciences Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6640-01-573-9912 |
| Primary Part Number | MT-HLDR |
| Item Name | Holder,microtube |
| FSC / FSG | 6640 / 66 — Laboratory Equipment and Supplies |
| Manufacturer | Charm Sciences Inc |
| 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 |
|---|---|
| MT-HLDR PRIMARY | Charm Sciences Inc (USA) |
| Reference | Meaning |
|---|---|
| 1529714 | 5/1 Secondary reference U.S. Government activity |
| 6640NCM184564 | 5/1 Secondary reference Defense Medical Standardization Board |
NSN 6640-01-573-9912 is a Holder,microtube, manufactured by Charm Sciences Inc, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
NSN 6640-01-573-9912 has 1 manufacturer part number on file: MT-HLDR (Charm Sciences Inc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-581-6535. Verify interchangeability with system specifications before substitution.
Key specifications for MT-HLDR: Special Features: 2 ML MICROTUBE HOLDER; FOR USE WITH END ITEM LUMINOMETER, 6630-01-536-1456.; Part Name Assigned by Controlling Agency: 2ML LUMINOMETER MICROTUBE HOLDER. 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.