The Tester,material Hardness, cataloged under National Stock Number 6635-01-645-8031, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. The manufacturer of record is Phase II Machine & Tool, Inc Div Phase II. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6635-01-645-8031 |
| Primary Part Number | PHT-1800 |
| Item Name | Tester,material Hardness |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Manufacturer | Phase II Machine & Tool, Inc Div Phase II |
| Status | ACTIVE |
| Indicator Type | DIGITAL COUNTER |
| Usage Design | EXTERNAL |
| Indicator Reading Type | SINGLE |
| Test Type | BRINELL |
| Indicator Design | DIRECT READING |
| Carrying Case | PROVIDED |
| Installation Design | PORTABLE |
| 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 |
|---|---|
| PHT-1800 PRIMARY | Phase II Machine & Tool, Inc Div Phase II (USA) |
| Reference | Meaning |
|---|---|
| PHT-1800 | 5/9 Secondary reference Automation and Metrology, Inc. Dba Ami Partners |
NSN 6635-01-645-8031 is a Tester,material Hardness, manufactured by Phase II Machine & Tool, Inc Div Phase II, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
NSN 6635-01-645-8031 has 1 manufacturer part number on file: PHT-1800 (Phase II Machine & Tool, Inc Div Phase II).
Key specifications for PHT-1800: Indicator Type: DIGITAL COUNTER; Usage Design: EXTERNAL; Indicator Reading Type: SINGLE; Test Type: BRINELL. 7 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.