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Technical Data Sheet
PartsTable / COMPONENT / C-401
C-401 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include width: 1.000 INCHES NOMINAL IN, height: 1.348 INCHES NOMINAL IN, length: 2.535 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, card_size: 4.500 INCHES IN, duty_type: CONTINUOUS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-027-5634, 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
C-401
NSN: 5330-00-027-5634
FSC: 5330
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
width1.000 INCHES NOMINAL IN
height1.348 INCHES NOMINAL IN
length2.535 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
card_size4.500 INCHES IN
duty_typeCONTINUOUS
bowl_shapeSPHERICAL
design_typeSIDE READING AND TOP READING
body_materialPLASTIC PHENOLIC
coil_quantity1
cubic_measure39.938 CUBIC INCHES
hole_diameter0.344 INCHES MINIMUM AND 0.352 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-00-027-5634
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C-401 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
GAGE RING THICKNESS: 0.080 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 3.375 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 0.330 INCHES NOMINAL IN
•
APERTURE DIAMETER: 2.190 INCHES NOMINAL IN
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CROSS-SECTIONAL THICKNESS: 0.120 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
GAGE RING THICKNESS0.080 INCHES NOMINAL IN
OVERALL WIDTH4.035 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER3.375 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.330 INCHES NOMINAL IN
APERTURE DIAMETER2.190 INCHES NOMINAL IN
ELONGATION PERCENTAGE125 MAXIMUM
CROSS-SECTIONAL THICKNESS0.120 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SIDE RADIUS FROM GASKET CENTER1.400 INCHES NOMINAL IN
HOLE DIAMETER0.344 INCHES MINIMUM AND 0.352 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
ANSI B18.6.1Interchangeable
interchangeable cross-reference
interchangeable
FF-S-111 TY1ST2CInterchangeable
interchangeable cross-reference
interchangeable
MS35492-80Interchangeable
interchangeable cross-reference
interchangeable
40-129Interchangeable
interchangeable cross-reference
interchangeable
A40-129Interchangeable
interchangeable cross-reference
interchangeable
2053076-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C-401?
C-401 is a RELAY,ELECTROMAGNETIC.
What parts can replace C-401?
There are 22 known substitutes for C-401: ANSI B18.6.1, FF-S-111 TY1ST2C, MS35492-80 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C-401?
C-401 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-027-5634. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026