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Technical Data Sheet
PartsTable / COMPONENT / 6B3056
6B3056 ✓ 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: LEATHER SEALING ELEMENT B, case_style: SQUARE, seal_width: 0.750 INCHES NOMINAL IN, surface_treatment: PHOSPHATE CASE, housing_bore_diameter: 3.125 INCHES NOMINAL IN, sealing_element_style: VERTICAL-ANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-641-2326, 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
6B3056
NSN: 5330-00-641-2326
FSC: 5330
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialLEATHER SEALING ELEMENT B
case_styleSQUARE
seal_width0.750 INCHES NOMINAL IN
surface_treatmentPHOSPHATE CASE
housing_bore_diameter3.125 INCHES NOMINAL IN
sealing_element_styleVERTICAL-ANGULAR
accommodated_shaft_diameter2.125 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-641-2326
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6B3056 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
•
MATERIAL: WOOL SEALING ELEMENT A
•
CASE STYLE: SQUARE
•
SEALING ELEMENT STYLE: VERTICAL-ANGULAR
•
ACCOMMODATED SHAFT DIAMETER: 2.125 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 3.125 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
SEAL WIDTH: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALWOOL SEALING ELEMENT A
CASE STYLESQUARE
MATERIALSTEEL CASE
SEALING ELEMENT STYLEVERTICAL-ANGULAR
ACCOMMODATED SHAFT DIAMETER2.125 INCHES NOMINAL IN
HOUSING BORE DIAMETER3.125 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
SEAL WIDTH0.750 INCHES NOMINAL IN
MATERIALLEATHER SEALING ELEMENT B
SURFACE TREATMENTPHOSPHATE CASE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
6047Interchangeable
interchangeable cross-reference
interchangeable
2315161Interchangeable
interchangeable cross-reference
interchangeable
HC112Interchangeable
interchangeable cross-reference
interchangeable
2129Interchangeable
interchangeable cross-reference
interchangeable
4369464Interchangeable
interchangeable cross-reference
interchangeable
11675Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6B3056?
6B3056 is a SEAL,PLAIN ENCASED.
What parts can replace 6B3056?
There are 18 known substitutes for 6B3056: 6047, 2315161, HC112 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6B3056?
6B3056 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-641-2326. 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