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OMP3963C — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

OMP3963C: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL CORROSION RESISTING, design_type: FRICTION, surface_treatment: PASSIVATE, material_document_and_classification: MIL-S-7720, COMP 303S, COND A MIL SPEC SINGLE MATERIAL RESPONSE, opening_inside_diameter_for_which_designed: 1.400 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-021-8879, 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
OMP3963C
NSN: 5340-01-021-8879
FSC: 5340 — Hardware, Commercial
CAGE: 33068 — TRIUMPH ACTUATION SYSTEMS - CONNECTICUT, LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
design_typeFRICTION
surface_treatmentPASSIVATE
material_document_and_classificationMIL-S-7720, COMP 303S, COND A MIL SPEC SINGLE MATERIAL RESPONSE
opening_inside_diameter_for_which_designed1.400 INCHES NOMINAL IN
NSN5340-01-021-8879
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: OMP3963C 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
•
DESIGN TYPE: FRICTION
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720, COMP 303S, COND A MIL SPEC SINGLE MATERIAL RESPONSE
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 1.400 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720, COMP 303S, COND A MIL SPEC SINGLE MATERIAL RESPONSE
OPENING INSIDE DIAMETER FOR WHICH DESIGNED1.400 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL CORROSION RESISTING
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
A15HS018-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is OMP3963C?
OMP3963C is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace OMP3963C?
There is 1 known substitute for OMP3963C: A15HS018-4. Substitute compatibility should be verified for your specific system.
What is the NSN for OMP3963C?
OMP3963C is cataloged in the U.S. Government catalog under NSN 5340-01-021-8879. 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.