PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M8Tester,material Hardness

Service Diamond Tool Co · NSN 6635-00-047-8503 · FSC 6635 · No Item Name Available
Verified by PartsTable
NSN 6635-00-047-8503 — this item is cataloged by the U.S. Government under National Stock Number 6635-00-047-8503. Primary manufacturer part number: M8.
Features
  • Tester,material Hardness — FSC 6635
  • Usage Design: INTERNAL
  • Indicator Reading Type: MULTIPLE
  • Vertical Capacity: 8.000 INCHES IN
  • Test Type: SCLEROSCOPE
  • Indicator Type: MICROMETER MEASURING MICROSCOPE
  • Indicator Design: DIRECT READING
  • Carrying Case: NOT PROVIDED
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tester,material Hardness, cataloged under National Stock Number 6635-00-047-8503, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Service Diamond Tool Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6635-00-047-8503
Primary Part NumberM8
Item NameTester,material Hardness
FSC / FSG6635 / 66 — No Item Name Available
ManufacturerService Diamond Tool Co
StatusACTIVE
Usage DesignINTERNAL
Indicator Reading TypeMULTIPLE
Vertical Capacity8.000 INCHES IN
Test TypeSCLEROSCOPE
Indicator TypeMICROMETER MEASURING MICROSCOPE
Indicator DesignDIRECT READING
Carrying CaseNOT PROVIDED
Installation DesignBENCH
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-144-8482 INTERCHANGEABLE
Bearing,ball,annular
3040-00-242-8906SC-B-34416 INTERCHANGEABLE
Collar,shaft
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5345-00-286-905761463686095 INTERCHANGEABLE
Stone,sharpening
Saint-Gobain Abrasives Inc
5965-00-296-6053D208 INTERCHANGEABLE
Loudspeaker,permanent Magnet
Harman Professional, Inc.
5962-00-473-3487M8-7 INTERCHANGEABLE
Microcircuit,linear
Data Device Corp Dba Beta Transformer Technology
2430-00-740-5800 INTERCHANGEABLE
Tractor,full Tracked,high Speed
2590-00-838-1800 INTERCHANGEABLE
Bulldozer,earth Moving
4820-00-855-6169 INTERCHANGEABLE
Valve,relief,pressure and Temper
6645-00-951-068710511629 INTERCHANGEABLE
Meter,time Totalizing
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
3460-01-077-6481 INTERCHANGEABLE
Mandrel,abrasive Roll
Cross-Reference Index
Part NumberManufacturer
M8 PRIMARY Service Diamond Tool Co (USA)
Related Parts
3110-00-144-8482INTERCHANGEABLE
BEARING,BALL,ANNULAR
3040-00-242-8906INTERCHANGEABLE
COLLAR,SHAFT
SC-B-34416
5345-00-286-9057INTERCHANGEABLE
STONE,SHARPENING
61463686095
5965-00-296-6053INTERCHANGEABLE
LOUDSPEAKER,PERMANENT MAGNET
D208
5962-00-473-3487INTERCHANGEABLE
MICROCIRCUIT,LINEAR
M8-7
2430-00-740-5800INTERCHANGEABLE
TRACTOR,FULL TRACKED,HIGH SPEED
2590-00-838-1800INTERCHANGEABLE
BULLDOZER,EARTH MOVING
4820-00-855-6169INTERCHANGEABLE
VALVE,RELIEF,PRESSURE AND TEMPER
6645-00-951-0687INTERCHANGEABLE
METER,TIME TOTALIZING
10511629
3460-01-077-6481INTERCHANGEABLE
MANDREL,ABRASIVE ROLL
6650-01-116-0752INTERCHANGEABLE
MICROSCOPE,OPTICAL
4520-01-156-4884INTERCHANGEABLE
DRAFT CONTROL,FLUE,AUTOMATIC

Frequently Asked Questions

What is NSN 6635-00-047-8503?

NSN 6635-00-047-8503 is a Tester,material Hardness, manufactured by Service Diamond Tool Co, classified under FSC 6635 (No Item Name Available). Status: active.

What are the part numbers for NSN 6635-00-047-8503?

NSN 6635-00-047-8503 has 1 cross-referenced part number: M8 (Service Diamond Tool Co).

What NSN replaces 6635-00-047-8503?

There are 12 known substitutes for 6635-00-047-8503: 3110-00-144-8482, 3040-00-242-8906, 5345-00-286-9057 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M8?

Key specifications for M8: Usage Design: INTERNAL; Indicator Reading Type: MULTIPLE; Vertical Capacity: 8.000 INCHES IN; Test Type: SCLEROSCOPE. 8 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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