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OMP3948C — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

OMP3948C: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL COMP 303, design_type: FRICTION, surface_treatment: PASSIVATE, material_document_and_classification: QQ-S-764, TYPE 303, COND A FED SPEC SINGLE MATERIAL RESPONSE, tube_outside_diameter_for_which_designed: 1.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-021-8880, 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
OMP3948C
NSN: 5340-01-021-8880
FSC: 5340 — Hardware, Commercial
CAGE: 33068 — TRIUMPH ACTUATION SYSTEMS - CONNECTICUT, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 303
design_typeFRICTION
surface_treatmentPASSIVATE
material_document_and_classificationQQ-S-764, TYPE 303, COND A FED SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed1.500 INCHES NOMINAL IN
NSN5340-01-021-8880
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: OMP3948C 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764, TYPE 303, COND A FED SPEC SINGLE MATERIAL RESPONSE
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL COMP 303
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764, TYPE 303, COND A FED SPEC SINGLE MATERIAL RESPONSE
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL COMP 303
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
A15HS019-4Same 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 OMP3948C?
OMP3948C is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace OMP3948C?
There is 1 known substitute for OMP3948C: A15HS019-4. Substitute compatibility should be verified for your specific system.
What is the NSN for OMP3948C?
OMP3948C is cataloged in the U.S. Government catalog under NSN 5340-01-021-8880. 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.