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Technical Data Sheet
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HM3ET ✓ 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 HM3ET is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6645-00-171-9251, 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
HM3ET
NSN: 6645-00-171-9251
FSC: 6645
CAGE: 33005 — JEWELL INSTRUMENTS LLC (USA)
SPECIFICATIONS
Part NumberHM3ET
NSN6645-00-171-9251
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HM3ET TITLE COMPONENT PN HM3ET MFR HM3ET
KEY FEATURES
•
MATERIAL: PLASTIC CASE
•
INDICATOR TYPE: DRUM REGISTER
•
MARKING COLOR: WHITE NUMERALS
•
HERMETIC PROTECTION: NOT PROVIDED
•
MEASUREMENT UNIT: HOURS
•
RESET FEATURE: NOT PROVIDED
•
MAXIMUM MEASUREMENT: 9999.90
•
SMALLEST INCREMENT INDICATED: 0.10
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC CASE
INDICATOR TYPEDRUM REGISTER
MARKING COLORWHITE NUMERALS
HERMETIC PROTECTIONNOT PROVIDED
MEASUREMENT UNITHOURS
RESET FEATURENOT PROVIDED
MAXIMUM MEASUREMENT9999.90
SMALLEST INCREMENT INDICATED0.10
OPERATING FREQUENCY60.0 HERTZ NOMINAL
HERMETIC PROTECTIONNOT PROVIDED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
634EA08SInterchangeable
interchangeable cross-reference
interchangeable
717228-1Interchangeable
interchangeable cross-reference
interchangeable
HM3ETInterchangeable
interchangeable cross-reference
interchangeable
M5284Interchangeable
interchangeable cross-reference
interchangeable
A1022608ISSUEAInterchangeable
Same NIIN cross-reference
interchangeable
788C421H02Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HM3ET?
HM3ET is a HM3ET.
What parts can replace HM3ET?
There are 8 known substitutes for HM3ET: 634EA08S, 717228-1, HM3ET and 5 more. Substitute compatibility should be verified for your specific system.
Is HM3ET still available?
HM3ET is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026