PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MODELBTester,material Hardness

Webster Instrument Inc · NSN 6635-00-604-0773 · FSC 6635 · No Item Name Available
Verified by PartsTable
NSN 6635-00-604-0773 — this item is cataloged by the U.S. Government under National Stock Number 6635-00-604-0773. Primary manufacturer part number: MODELB.
Features
  • Tester,material Hardness — FSC 6635
  • Carrying Case: NOT PROVIDED
  • Installation Design: PORTABLE
  • Indicator Design: DIRECT READING
  • Indicator Reading Type: SINGLE
  • Test Type: ROCKWELL
  • Usage Design: EXTERNAL
  • Indicator Type: CIRCULAR DIAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tester,material Hardness, cataloged under National Stock Number 6635-00-604-0773, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Webster Instrument Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6635-00-604-0773
Primary Part NumberMODELB
Item NameTester,material Hardness
FSC / FSG6635 / 66 — No Item Name Available
ManufacturerWebster Instrument Inc
StatusACTIVE
Carrying CaseNOT PROVIDED
Installation DesignPORTABLE
Indicator DesignDIRECT READING
Indicator Reading TypeSINGLE
Test TypeROCKWELL
Usage DesignEXTERNAL
Indicator TypeCIRCULAR DIAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4320-00-204-20913P641 INTERCHANGEABLE
Pump Unit,centrifugal
W. W. Grainger, Inc.
4910-00-300-1344MODELB INTERCHANGEABLE
Indicator,piston Position,igniti
Parker Hannifin Corp Dba Pneutronics
4940-00-542-2505 INTERCHANGEABLE
Cleaner,steam,pressure Jet
5120-00-860-7544M0DELA INTERCHANGEABLE
Press,grommet and Eyelet,hand-Op
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
6740-01-058-7422141-2212 INTERCHANGEABLE
Safelight,darkroom,photographic
Eastman Kodak Co
7830-01-067-6181126010-CB INTERCHANGEABLE
Mat,rifle Range
Crosstac Corp
3895-01-375-9974MODEL B INTERCHANGEABLE
Joint Cleaning-Refacing Machine,
Lab Mfg Inc
6515-01-557-79023539-250-230 INTERCHANGEABLE
Dermatome
Integra Lifesciences Corporation
Cross-Reference Index
Part NumberManufacturer
M0DELB Webster Instruments Inc (USA)
MODELB PRIMARY Webster Instrument Inc (USA)
Related Parts
4320-00-204-2091INTERCHANGEABLE
PUMP UNIT,CENTRIFUGAL
3P641
4910-00-300-1344INTERCHANGEABLE
INDICATOR,PISTON POSITION,IGNITI
MODELB
4940-00-542-2505INTERCHANGEABLE
CLEANER,STEAM,PRESSURE JET
5120-00-860-7544INTERCHANGEABLE
PRESS,GROMMET AND EYELET,HAND-OP
M0DELA
6740-01-058-7422INTERCHANGEABLE
SAFELIGHT,DARKROOM,PHOTOGRAPHIC
141-2212
7830-01-067-6181INTERCHANGEABLE
MAT,RIFLE RANGE
126010-CB
3895-01-375-9974INTERCHANGEABLE
JOINT CLEANING-REFACING MACHINE,
MODEL B
6515-01-557-7902INTERCHANGEABLE
DERMATOME
3539-250-230

Frequently Asked Questions

What is NSN 6635-00-604-0773?

NSN 6635-00-604-0773 is a Tester,material Hardness, manufactured by Webster Instrument Inc, classified under FSC 6635 (No Item Name Available). Status: active.

What are the part numbers for NSN 6635-00-604-0773?

NSN 6635-00-604-0773 has 2 cross-referenced part numbers: M0DELB (Webster Instruments Inc), MODELB (Webster Instrument Inc).

What NSN replaces 6635-00-604-0773?

There are 8 known substitutes for 6635-00-604-0773: 4320-00-204-2091, 4910-00-300-1344, 4940-00-542-2505 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MODELB?

Key specifications for MODELB: Carrying Case: NOT PROVIDED; Installation Design: PORTABLE; Indicator Design: DIRECT READING; Indicator Reading Type: SINGLE. 7 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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