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Piston T-Seal, 3.50 Inch Bore, O-Ring Groove

Bore 3.50	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Supplier Part Number TP-035	Alternate Part Numbers Alternate Part Number C1DM34, Alternate Part Number MI-01812527, Alternate Part Number MINO-00407X90079	Product Weight 0.03 lbs

Product Questions & Answers 2

Product Questions & Answers

got a cylinder with a 3.50 bore, is this t-seal the right style for a piston with an o-ring groove?

Question by: Shawn W on Jul 26, 2025, 10:24 AM

For a 3.50 inch bore piston that uses an O-ring groove style seal, this is a piston T-seal made for that setup. It uses hard plastic back-up rings with a Buna-N rubber sealing element to help keep hydraulic fluid from leaking past the piston.

Answer by: Customer Support on Jul 28, 2025, 6:11 AM

Reckon this T-seal is what I need for my hydraulic cylinder with a 3.5 inch bore? Gotta make sure before I order.

Question by: Roy M on Mar 7, 2026, 7:16 AM

This Piston T-Seal is indeed designed for hydraulic cylinders with a 3.5-inch bore, featuring an O-ring groove for enhanced sealing. Confirm that the alternate part numbers listed – C1DM34, MI-01812527, or MINO-00407X90079 – match what you're replacing.

Answer by: Customer Support on Mar 9, 2026, 6:16 AM

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