PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 6684S
6684S ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEALING ELEMENT B, case_style: SQUARE, seal_width: 0.593 INCHES NOMINAL IN, housing_bore_diameter: 3.881 INCHES NOMINAL IN, sealing_element_style: ANGULAR-OPPOSED, accommodated_shaft_diameter: 2.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-171-5765, 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
6684S
NSN: 5330-00-171-5765
FSC: 5330
CAGE: 76680 — FEDERAL-MOGUL CORP CHASSIS PRODUCTS DIV (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT B
case_styleSQUARE
seal_width0.593 INCHES NOMINAL IN
housing_bore_diameter3.881 INCHES NOMINAL IN
sealing_element_styleANGULAR-OPPOSED
accommodated_shaft_diameter2.750 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed500 FEET PER MINUTE FT
NSN5330-00-171-5765
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6684S 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
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 500 FEET PER MINUTE FT
•
MATERIAL: STEEL CASE
•
ACCOMMODATED SHAFT DIAMETER: 2.750 INCHES NOMINAL IN
•
SEAL WIDTH: 0.593 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
HOUSING BORE DIAMETER: 3.881 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT MAXIMUM RATED SPEED500 FEET PER MINUTE FT
MATERIALSTEEL CASE
ACCOMMODATED SHAFT DIAMETER2.750 INCHES NOMINAL IN
SEAL WIDTH0.593 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT A
CASE STYLESQUARE
HOUSING BORE DIAMETER3.881 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT B
SEALING ELEMENT STYLEANGULAR-OPPOSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
AN668-4Interchangeable
interchangeable cross-reference
interchangeable
MS20668-4Interchangeable
interchangeable cross-reference
interchangeable
BAC1823-4Interchangeable
interchangeable cross-reference
interchangeable
6684Interchangeable
interchangeable cross-reference
interchangeable
2887Interchangeable
interchangeable cross-reference
interchangeable
C65134Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 6684S?
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 6684S?
6684S is a SEAL,PLAIN ENCASED.
What parts can replace 6684S?
There are 12 known substitutes for 6684S: AN668-4, MS20668-4, BAC1823-4 and 9 more. Substitute compatibility should be verified for your specific system.
Is 6684S still available?
6684S is currently cancelled.
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 — 6684S

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