The Tube,sampling, cataloged under National Stock Number 6640-01-045-0821, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. The manufacturer of record is Waltron Bull & Roberts, Llc. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 6640-01-045-0821 |
| Primary Part Number | A-0020 |
| Item Name | Tube,sampling |
| FSC / FSG | 6640 / 66 — Laboratory Equipment and Supplies |
| Manufacturer | Waltron Bull & Roberts, Llc |
| Status | ACTIVE |
| Unit of Issue Cube | 0.001 CUBIC FEET |
| General Characteristics Item Description | GLASS MATERIAL,DIM.4 IN.L,1/2 IN. DIA. TAPERED TO APPROX 1/8 IN. DIA. AT ONE END,FEEDS LIQUID INTO DISSOLVED OXYGEN TESTER IN |
| 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 |
|---|---|
| A-0020 PRIMARY | Waltron Bull & Roberts, Llc (USA) |
| Reference | Meaning |
|---|---|
| EQ679 | 5/9 Secondary reference Waltron Bull & Roberts, Llc |
NSN 6640-01-045-0821 is a Tube,sampling, manufactured by Waltron Bull & Roberts, Llc, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
NSN 6640-01-045-0821 has 1 manufacturer part number on file: A-0020 (Waltron Bull & Roberts, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4330-01-443-0529, 1670-01-717-2148. Verify interchangeability with system specifications before substitution.
Key specifications for A-0020: Unit of Issue Cube: 0.001 CUBIC FEET; General Characteristics Item Description: GLASS MATERIAL,DIM.4 IN.L,1/2 IN. DIA. TAPERED TO APPROX 1/8 IN. DIA. AT ONE END,FEEDS LIQUID INTO DISSOLVED OXYGEN TESTER IN. 2 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.