PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 81878-6
81878-6 ✓ 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 RUBBER STRIP is a the manufacturer industrial component. Key specifications include length: 3.380 INCHES MINIMUM AND 3.620 INCHES MAXIMUM IN, material: RUBBER POLYISOPRENE NATURAL CLASS NR, surface_condition: SMOOTH BOTH SIDES, fabrication_method: CELLULAR, UNEXPLODED, cross-sectional_width: 0.125 INCHES NOMINAL IN, cross-sectional_height: 2.130 INCHES MINIMUM AND 2.370 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-249-0545, 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
81878-6
NSN: 5330-00-249-0545
FSC: 5330
CAGE: 26916 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV MULTIPLE (USA)
SPECIFICATIONS
length3.380 INCHES MINIMUM AND 3.620 INCHES MAXIMUM IN
materialRUBBER POLYISOPRENE NATURAL CLASS NR
surface_conditionSMOOTH BOTH SIDES
fabrication_methodCELLULAR, UNEXPLODED
cross-sectional_width0.125 INCHES NOMINAL IN
cross-sectional_height2.130 INCHES MINIMUM AND 2.370 INCHES MAXIMUM IN
environmental_protectionLOW TEMPERATURE
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-R-6130 TYPE 2 GRADE C CONDITION MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE
NSN5330-00-249-0545
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 81878-6 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
•
LENGTH: 3.380 INCHES MINIMUM AND 3.620 INCHES MAXIMUM IN
•
CROSS-SECTIONAL WIDTH: 0.125 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-6130 TYPE 2 GRADE C CONDITION MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL HEIGHT: 2.130 INCHES MINIMUM AND 2.370 INCHES MAXIMUM IN
•
ENVIRONMENTAL PROTECTION: LOW TEMPERATURE
•
FABRICATION METHOD: CELLULAR, UNEXPLODED
•
MATERIAL: RUBBER POLYISOPRENE NATURAL CLASS NR
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
LENGTH3.380 INCHES MINIMUM AND 3.620 INCHES MAXIMUM IN
CROSS-SECTIONAL WIDTH0.125 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-6130 TYPE 2 GRADE C CONDITION MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL HEIGHT2.130 INCHES MINIMUM AND 2.370 INCHES MAXIMUM IN
ENVIRONMENTAL PROTECTIONLOW TEMPERATURE
FABRICATION METHODCELLULAR, UNEXPLODED
MATERIALRUBBER POLYISOPRENE NATURAL CLASS NR
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE CONDITIONSMOOTH BOTH SIDES
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MIL-R-6130Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-6130CInterchangeable
interchangeable cross-reference
interchangeable
AS0529-1Interchangeable
interchangeable cross-reference
interchangeable
529-1Interchangeable
interchangeable cross-reference
interchangeable
134GT1011Interchangeable
interchangeable cross-reference
interchangeable
MIL-A-8625FInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 81878-6?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 81878-6?
81878-6 is a RUBBER STRIP.
What parts can replace 81878-6?
There are 10 known substitutes for 81878-6: MIL-R-6130, MIL-R-6130C, AS0529-1 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 81878-6?
81878-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-249-0545. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 81878-6

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026