Tester, Material Hardness6635-01-260-3645

NSN 6635-01-260-3645 · NIIN 012603645

FSC 6635 — Physical Properties Testing and Inspection · FSG 66 — Instruments and Laboratory Equipment

Government record, cited

Also searched as 6635-01-260-3645 · 6635012603645 · NIIN 012603645 · 01-260-3645 · FSC 6635 Physical Properties Testing and Inspection · RT-370 · 862-580 · 6635-1412-1206

Nearby stock numbers ← 6635-01-260-3644 Tester, Material Hardness · 6635-01-261-1369 Probe, Eddy Current →

Features

Tester,material Hardness — FSC 6635
Type/model Designation: RT-370

Identification

NSN: 6635-01-260-3645
NIIN: 012603645
FSC: 6635 — Physical Properties Testing and Inspection
FSG: 66 — Instruments and Laboratory Equipment

General Description

The Tester,material Hardness, cataloged under National Stock Number 6635-01-260-3645, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	6635-01-260-3645
Item Name	Tester,material Hardness
FSC / FSG	6635 / 66 — Physical Properties Testing and Inspection
Status	ACTIVE
Type/model Designation	RT-370

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
RT-370	5/2 Secondary reference U.S. Government activity
862-580	3/2 Design control — primary reference U.S. Government activity
6635-1412-1206	6/9 Informative reference only U.S. Government activity

No interchangeability data on file.

Other items in FSC 6635 — Physical Properties Testing and Inspection

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

6635-00-000-0133

X-RAY APPARATUS,RADIOGRAPHIC,IND

6635-00-001-1523

FILM,RADIOGRAPHIC

6635-00-001-2317

6635-00-001-2317 · Item name not on file

6635-00-001-2318

6635-00-001-2318 · Item name not on file

6635-00-003-0281

TESTER,TORQUE WRENCH

6635-00-003-0282

CALIBRATOR,TORQUE

6635-00-003-0284

CALIBRATOR,TORQUE

6635-00-003-1193

6635-00-003-1193 · Item name not on file

Frequently Asked Questions

What is NSN 6635-01-260-3645?

NSN 6635-01-260-3645 is a Tester,material Hardness, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.

What are the specifications of 6635-01-260-3645?

Key specifications for 6635-01-260-3645: Type/model Designation: RT-370. 1 specification is documented in the U.S. Government catalog.

Is NSN 6635-01-260-3645 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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