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Technical Data Sheet
WF421 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The HEATER,THERMAL RELEASE is a the manufacturer industrial component. Key specifications include shape: STRAIGHT, material: PLASTIC BODY, lens_color: COLORLESS, overall_length: 10.500 INCHES MAXIMUM IN, mounting_method: RING, overall_diameter: 2.500 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6230-00-164-6605, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
WF421
NSN: 6230-00-164-6605
FSC: 6230
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
shapeSTRAIGHT
materialPLASTIC BODY
lens_colorCOLORLESS
overall_length10.500 INCHES MAXIMUM IN
mounting_methodRING
overall_diameter2.500 INCHES MAXIMUM IN
special_featuresGLASS OR PLASTIC LENS
features_providedSWITCH AND REPLACEABLE BATTERY
lens_transparencyTRANSPARENT
light_beam_motionFIXED
lens_surface_conditionSMOOTH FACE
lens_type_and_quantity1 FLAT, ROUND
NSN6230-00-164-6605
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HEATER,THERMAL RELEASE TITLE COMPONENT PN WF421 MFR HEATER,THERMAL RELEASE
KEY FEATURES
FEATURES PROVIDED: SWITCH AND REPLACEABLE BATTERY
LIGHT BEAM MOTION: FIXED
LENS COLOR: COLORLESS
FURNISHED ITEMS AND QUANTITY: 1 LAMP
NONDEFINITIVE SPEC/STD DATA: 2 CLASS AND 1 SIZE
LENS TRANSPARENCY: TRANSPARENT
OVERALL DIAMETER: 2.750 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
FEATURES PROVIDEDSWITCH AND REPLACEABLE BATTERY
LIGHT BEAM MOTIONFIXED
LENS COLORCOLORLESS
FURNISHED ITEMS AND QUANTITY1 LAMP
NONDEFINITIVE SPEC/STD DATA2 CLASS AND 1 SIZE
LENS TRANSPARENCYTRANSPARENT
OVERALL DIAMETER2.750 INCHES MAXIMUM IN
SPECIAL FEATURESGLASS OR PLASTIC LENS
OVERALL LENGTH9.000 INCHES MAXIMUM IN
BATTERY TYPE AND QUANTITY REQUIRED2 DRY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
SD13Interchangeable
interchangeable cross-reference
interchangeable
2-251Interchangeable
interchangeable cross-reference
interchangeable
20A11EM251Interchangeable
interchangeable cross-reference
interchangeable
95482188Interchangeable
interchangeable cross-reference
interchangeable
2-251-77-545Interchangeable
interchangeable cross-reference
interchangeable
CLASS2SIZE1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WF421?
WF421 is a HEATER,THERMAL RELEASE.
What parts can replace WF421?
There are 19 known substitutes for WF421: SD13, 2-251, 20A11EM251 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WF421?
WF421 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6230-00-164-6605. This indicates validated use in U.S. government and defense supply chains.
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