PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R400Radiacmeter

Flir Detection, Inc. · NSN 6665-01-693-8421 · FSC 6665 · No Item Name Available
Verified by PartsTable
NSN 6665-01-693-8421 — this item is cataloged by the U.S. Government under National Stock Number 6665-01-693-8421. Primary manufacturer part number: R400.
Features
  • Radiacmeter — FSC 6665
  • Portability: PORTABLE
  • Voltage in Volts and Current Type: 100.0 AC AND 240.0 AC
  • 3 verified cross-references
  • Primary manufacturer: Flir Detection, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Radiacmeter, cataloged under National Stock Number 6665-01-693-8421, is classified within Federal Supply Class 6665 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Flir Detection, Inc.. Government technical data includes 2 verified specifications, 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
NSN6665-01-693-8421
Primary Part NumberR400
Item NameRadiacmeter
FSC / FSG6665 / 66 — No Item Name Available
ManufacturerFlir Detection, Inc.
StatusACTIVE
PortabilityPORTABLE
Voltage in Volts and Current Type100.0 AC AND 240.0 AC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-155-738272-6970-801 INTERCHANGEABLE
Bearing,roller,cylindrical
Fairbanks Morse, Llc
4820-00-221-5633R400-3/8 INTERCHANGEABLE
Valve,float
Robert Manufacturing Company Inc
4820-00-269-7064R400-1/2 INTERCHANGEABLE
Valve,float
Robert Manufacturing Company Inc
4320-00-289-5965C144A INTERCHANGEABLE
Ring,wearing
Circor Naval Solutions Llc Dba Warren Pumps
6140-00-921-3670C18.2M 1.2K4 INTERCHANGEABLE
Battery,storage
Sae International Dba Sae International
4820-01-077-3948R400-1 INTERCHANGEABLE
Valve,float
Robert Manufacturing Company Inc
6350-01-243-0588SPIIM INTERCHANGEABLE
Alarm,personal Distress
Grace Industries, Inc.
5945-01-282-7201R400 INTERCHANGEABLE
Relay,electromagnetic
Psg Controls, Inc.
6130-01-462-5927121834-001 INTERCHANGEABLE
Power Supply
Marathonnorco Aerospace, Inc. Dba Christie Electric
7035-01-592-6912R400 INTERCHANGEABLE
Remote Control,instrument-Equipm
Logitech Inc
Cross-Reference Index
Part NumberManufacturer
958090622 Cristanini S.p.a. (ITA)
R400 Flir Systems Limited (GBR)
R400 PRIMARY Flir Detection, Inc. (USA)
Related Parts
3110-00-155-7382INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
72-6970-801
4820-00-221-5633INTERCHANGEABLE
VALVE,FLOAT
R400-3/8
4820-00-269-7064INTERCHANGEABLE
VALVE,FLOAT
R400-1/2
4320-00-289-5965INTERCHANGEABLE
RING,WEARING
C144A
6140-00-921-3670INTERCHANGEABLE
BATTERY,STORAGE
C18.2M 1.2K4
4820-01-077-3948INTERCHANGEABLE
VALVE,FLOAT
R400-1
6350-01-243-0588INTERCHANGEABLE
ALARM,PERSONAL DISTRESS
SPIIM
5945-01-282-7201INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
R400
6130-01-462-5927INTERCHANGEABLE
POWER SUPPLY
121834-001
7035-01-592-6912INTERCHANGEABLE
REMOTE CONTROL,INSTRUMENT-EQUIPM
R400
1270-01-627-9036INTERCHANGEABLE
RECEIVER-TRANSMITTER,LASER
R400
5895-01-653-4181INTERCHANGEABLE
SELECTOR,RECEIVER SIGNAL
R400

Frequently Asked Questions

What is NSN 6665-01-693-8421?

NSN 6665-01-693-8421 is a Radiacmeter, manufactured by Flir Detection, Inc., classified under FSC 6665 (No Item Name Available). Status: active.

What are the part numbers for NSN 6665-01-693-8421?

NSN 6665-01-693-8421 has 3 cross-referenced part numbers: 958090622 (Cristanini S.p.a.), R400 (Flir Systems Limited), R400 (Flir Detection, Inc.).

What NSN replaces 6665-01-693-8421?

There are 12 known substitutes for 6665-01-693-8421: 3110-00-155-7382, 4820-00-221-5633, 4820-00-269-7064 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of R400?

Key specifications for R400: Part Name Assigned by Controlling Agency: HANDHELD SPECTROSCOPIC RADIATON DETECTION & INDENTIFICATI; Portability: PORTABLE; Overall Length: 3.7 INCHES NOMINAL IN; Special Features: DISPLAY & ALERTS TRANSFLECTIVE COLOR LCD, DATA STORAGE 2GB INTERNAL MMORY UP TO 600,00 SPECTRA, GPS REMOVABLE 12-CHANNEL SIRF III RECEIVER, GB. 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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