PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M21Magnetometer

Irwin Laboratories Inc · NSN 6635-01-009-2106 · FSC 6635 · No Item Name Available
Verified by PartsTable
NSN 6635-01-009-2106 — this item is cataloged by the U.S. Government under National Stock Number 6635-01-009-2106. Primary manufacturer part number: M21.
Features
  • Magnetometer — FSC 6635
  • 1 verified cross-reference
  • Primary manufacturer: Irwin Laboratories Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Magnetometer, cataloged under National Stock Number 6635-01-009-2106, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Irwin Laboratories Inc. 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
NSN6635-01-009-2106
Primary Part NumberM21
Item NameMagnetometer
FSC / FSG6635 / 66 — No Item Name Available
ManufacturerIrwin Laboratories Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4440-00-008-4864 INTERCHANGEABLE
Sensor Assembly,hum
1450-00-137-6221 INTERCHANGEABLE
Pump,hydraulic,air
1377-00-300-7922 INTERCHANGEABLE
Cutter,cartridge Actuated
3460-00-517-8225 INTERCHANGEABLE
Mandrel,roll
5831-00-522-1563 INTERCHANGEABLE
Mounting
5910-00-686-9120M21-E501MN INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
Viking Technologies, Ltd.
4820-00-937-59142125A INTERCHANGEABLE
Valve,check
Industrial Technologies and Services Llc
4720-00-990-167926413 INTERCHANGEABLE
Hose,preformed
Gates Corporation
6740-00-996-6930 INTERCHANGEABLE
Printer,contact
6695-01-191-0121 INTERCHANGEABLE
Bezel,instrument Mounting
Cross-Reference Index
Part NumberManufacturer
M21 Irwin Laboratories Inc (USA)
Related Parts
4440-00-008-4864INTERCHANGEABLE
SENSOR ASSEMBLY,HUM
1450-00-137-6221INTERCHANGEABLE
PUMP,HYDRAULIC,AIR
1377-00-300-7922INTERCHANGEABLE
CUTTER,CARTRIDGE ACTUATED
3460-00-517-8225INTERCHANGEABLE
MANDREL,ROLL
5831-00-522-1563INTERCHANGEABLE
MOUNTING
5910-00-686-9120INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
M21-E501MN
4820-00-937-5914INTERCHANGEABLE
VALVE,CHECK
2125A
4720-00-990-1679INTERCHANGEABLE
HOSE,PREFORMED
26413
6740-00-996-6930INTERCHANGEABLE
PRINTER,CONTACT
6695-01-191-0121INTERCHANGEABLE
BEZEL,INSTRUMENT MOUNTING
3820-01-291-7948INTERCHANGEABLE
AUGER,EARTH,PORTABLE
6520-01-340-9720INTERCHANGEABLE
PIN KIT,THREAD-FORMING,DENTAL

Frequently Asked Questions

What is NSN 6635-01-009-2106?

NSN 6635-01-009-2106 is a Magnetometer, manufactured by Irwin Laboratories Inc, classified under FSC 6635 (No Item Name Available). Status: active.

What are the part numbers for NSN 6635-01-009-2106?

NSN 6635-01-009-2106 has 1 cross-referenced part number: M21 (Irwin Laboratories Inc).

What NSN replaces 6635-01-009-2106?

There are 12 known substitutes for 6635-01-009-2106: 4440-00-008-4864, 1450-00-137-6221, 1377-00-300-7922 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M21?

Key specifications for M21: End Item Identification: AIRCRAFT MODEL S-2G G. 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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