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EH-21 — RELAY,ELECTROMAGNETIC

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

EH-21: RELAY,ELECTROMAGNETIC.

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303, thickness: 0.180 INCHES NOMINAL IN, bore_diameter: 0.1248 INCHES MINIMUM AND 0.1253 INCHES MAXIMUM IN, outside_diameter: 0.313 INCHES NOMINAL IN, style_designator: PLAIN ROUND, surface_treatment: PASSIVATE. This part is cataloged in the U.S.

Government catalog under NSN 3040-00-247-1261, 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
EH-21
NSN: 3040-00-247-1261
NIINs: 002471261, 013922853, 017014947
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 48313 — B.C. SYSTEMS INC. DBA BC SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 303
thickness0.180 INCHES NOMINAL IN
bore_diameter0.1248 INCHES MINIMUM AND 0.1253 INCHES MAXIMUM IN
outside_diameter0.313 INCHES NOMINAL IN
style_designatorPLAIN ROUND
surface_treatmentPASSIVATE
end_item_identificationEDGING MACHINE,OPHTHALMIC LENS NSN 6540-01-688-7154
material_document_and_classificationQQ-S-764, TYPE 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyWHEEL DRESSING STICKS, NO.400
NSN3040-00-247-1261
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,ELECTROMAGNETIC TITLE COMPONENT PN EH-21 MFR RELAY,ELECTROMAGNETIC
KEY FEATURES
•
STYLE DESIGNATOR: PLAIN ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764, TYPE 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 0.313 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE
•
BORE DIAMETER: 0.1248 INCHES MINIMUM AND 0.1253 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 303
•
THICKNESS: 0.180 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORPLAIN ROUND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764, TYPE 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER0.313 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE
BORE DIAMETER0.1248 INCHES MINIMUM AND 0.1253 INCHES MAXIMUM IN
MATERIALSTEEL COMP 303
THICKNESS0.180 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
G67-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is EH-21?
EH-21 is a RELAY,ELECTROMAGNETIC.
What parts can replace EH-21?
There is 1 known substitute for EH-21: G67-2. Substitute compatibility should be verified for your specific system.
What is the NSN for EH-21?
EH-21 is cataloged in the U.S. Government catalog under NSN 3040-00-247-1261. 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.