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E81 — THERMAL RELEASE,CIRCUIT BREAKER

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

E81: THERMAL RELEASE,CIRCUIT BREAKER.

THERMAL RELEASE,CIRCUIT BREAKER. Key specifications include material: STEEL, pipe_size: 0.250 INCHES NOMINAL IN, unit_type: STRAIGHT, flute_type: PLUG, screw_size: 0.250 INCHES NOMINAL IN, flute_design: STRAIGHT. This part is cataloged in the U.S.

Government catalog under NSN 3455-00-228-5294, 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
E81
NSN: 3455-00-228-5294
NIINs: 002285294, 017065789
FSC: 3455 — Cutting Tools for Machine Tools
CAGE: 71201 — BRUBAKER TOOL CORP (USA)
SPECIFICATIONS
materialSTEEL
pipe_size0.250 INCHES NOMINAL IN
unit_typeSTRAIGHT
flute_typePLUG
screw_size0.250 INCHES NOMINAL IN
flute_designSTRAIGHT
drill_diameter0.375 INCHES NOMINAL IN
overall_length2.500 INCHES NOMINAL IN
special_featuresINDUSTRIAL BLACK COATING
end_item_identification5180-01-518-7339
nondefinitive_spec/std_data1 TYPE AND 3 CLASS
NSN3455-00-228-5294
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available THERMAL RELEASE,CIRCUIT BREAKER TITLE COMPONENT PN E81 MFR THERMAL RELEASE,CIRCUI
SUBSTITUTES & CROSS-REFERENCES 9
5301-0250Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
685RH-1/4-3/8SReference document
Same NSN cross-reference
Reference document — Secondary reference
B8-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
55512Reference document
Same NSN cross-reference
Reference document — Secondary reference
SG8Reference document
Same NSN cross-reference
Reference document — Secondary reference
B30Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is E81?
E81 is a THERMAL RELEASE,CIRCUIT BREAKER.
What parts can replace E81?
There are 9 known substitutes for E81: 5301-0250, 685RH-1/4-3/8S, B8-2 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E81?
E81 is cataloged in the U.S. Government catalog under NSN 3455-00-228-5294. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.