PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NDT-25Inspection Unit,eddy Current

Olympus America Inc · NSN 6635-01-120-1630 · FSC 6635 · No Item Name Available
Verified by PartsTable
NSN 6635-01-120-1630 — this item is cataloged by the U.S. Government under National Stock Number 6635-01-120-1630. Primary manufacturer part number: NDT-25.
Features
  • Inspection Unit,eddy Current — FSC 6635
  • General Characteristics Item Description: PORTABLE MICROPROCESSOR WITH CRT AND LCD DIGITAL DISPLAYS WITH FILTERS,ALARM AND X-Y SWEEP OPTIONS; FREQUENCY RANGE-60 HZ TO 6 MHZ; SELF CONTAINED BATTERY PACK WITH CHARGER; 120 VAC 50 TO 60 HZ,OR 24 VDC; PUSH BUTTON CONTROL PANEL MHz
  • 3 verified cross-references
  • Primary manufacturer: Olympus America Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Inspection Unit,eddy Current, cataloged under National Stock Number 6635-01-120-1630, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Olympus America Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN6635-01-120-1630
Primary Part NumberNDT-25
Item NameInspection Unit,eddy Current
FSC / FSG6635 / 66 — No Item Name Available
ManufacturerOlympus America Inc
StatusACTIVE
General Characteristics Item DescriptionPORTABLE MICROPROCESSOR WITH CRT AND LCD DIGITAL DISPLAYS WITH FILTERS,ALARM AND X-Y SWEEP OPTIONS; FREQUENCY RANGE-60 HZ TO 6 MHZ; SELF CONTAINED BATTERY PACK WITH CHARGER; 120 VAC 50 TO 60 HZ,OR 24 VDC; PUSH BUTTON CONTROL PANEL MHz
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6635-00-288-4566EM3300 INTERCHANGEABLE
Detector,metal Flaw,electronic
Olympus America Inc
6635-00-433-0034 INTERCHANGEABLE
Magnetic Inspection Unit,portabl
6635-00-490-2621120 INTERCHANGEABLE
Magnaflux
Illinois Tool Works, Inc. Div Magnaflux
6635-01-092-2308 INTERCHANGEABLE
Magnetic Inspection Unit,portabl
6635-01-102-8044 INTERCHANGEABLE
Scanner,eddy Current
6635-01-113-8368NDT-16 INTERCHANGEABLE
Eddy Current Test System
Olympus America Inc
6635-01-114-0364RECHII-3181 INTERCHANGEABLE
Hole Inspector,eddy Current
Olympus America Inc
6635-01-144-8370NDT 25L INTERCHANGEABLE
Tester,eddy Current
Olympus America Inc
6635-01-159-0175PDSANE477 INTERCHANGEABLE
Detector,metal Flaw,electronic
Warner Robins Air Logistics Center
6635-01-198-8302NDT-25N INTERCHANGEABLE
Detector,flaw,electronic
Olympus America Inc
Cross-Reference Index
Part NumberManufacturer
NDT-25 PRIMARY Olympus America Inc (USA)
6635-7590-3000 Defense Supply Center Richmond Industrial Plant Equipment /dla/ (USA)
NDT-25 Olympus Scientific Solutions Technologies Inc. (USA)
Related Parts
6635-00-288-4566INTERCHANGEABLE
DETECTOR,METAL FLAW,ELECTRONIC
EM3300
6635-00-433-0034INTERCHANGEABLE
MAGNETIC INSPECTION UNIT,PORTABL
6635-00-490-2621INTERCHANGEABLE
MAGNAFLUX
120
6635-01-092-2308INTERCHANGEABLE
MAGNETIC INSPECTION UNIT,PORTABL
6635-01-102-8044INTERCHANGEABLE
SCANNER,EDDY CURRENT
6635-01-113-8368INTERCHANGEABLE
EDDY CURRENT TEST SYSTEM
NDT-16
6635-01-114-0364INTERCHANGEABLE
HOLE INSPECTOR,EDDY CURRENT
RECHII-3181
6635-01-144-8370INTERCHANGEABLE
TESTER,EDDY CURRENT
NDT 25L
6635-01-159-0175INTERCHANGEABLE
DETECTOR,METAL FLAW,ELECTRONIC
PDSANE477
6635-01-198-8302INTERCHANGEABLE
DETECTOR,FLAW,ELECTRONIC
NDT-25N
6635-01-279-8444INTERCHANGEABLE
INSPECTION STATION,EDDY CURRENT
6635-01-283-3395INTERCHANGEABLE
DETECTOR,METAL FLAW,ELECTRONIC
NDT-19

Frequently Asked Questions

What is NSN 6635-01-120-1630?

NSN 6635-01-120-1630 is a Inspection Unit,eddy Current, manufactured by Olympus America Inc, classified under FSC 6635 (No Item Name Available). Status: active.

What are the part numbers for NSN 6635-01-120-1630?

NSN 6635-01-120-1630 has 3 cross-referenced part numbers: NDT-25 (Olympus America Inc), 6635-7590-3000 (Defense Supply Center Richmond Industrial Plant Equipment /dla/), NDT-25 (Olympus Scientific Solutions Technologies Inc.).

What NSN replaces 6635-01-120-1630?

There are 12 known substitutes for 6635-01-120-1630: 6635-00-288-4566, 6635-00-433-0034, 6635-00-490-2621 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NDT-25?

Key specifications for NDT-25: General Characteristics Item Description: PORTABLE MICROPROCESSOR WITH CRT AND LCD DIGITAL DISPLAYS WITH FILTERS,ALARM AND X-Y SWEEP OPTIONS; FREQUENCY RANGE-60 HZ TO 6 MHZ; SELF CONTAINED BATTERY PACK WITH CHARGER; 120 VAC 50 TO 60 HZ,OR 24 VDC; PUSH BUTTON CONTROL PANEL MHz. 1 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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