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Style PSC Bronze Filled Piston Seal, 5.00 Inch Bore Diameter, 4.38 Inch Groove Diameter, Inch Groove Width

Description & Features

Designed for hydraulic cylinders with a 5.00-inch bore, this Style PSC Bronze Filled Piston Seal from Hercules Sealing Products provides reliable sealing performance across a wide range of industrial applications. The seal assembly consists of a 40% bronze filled PTFE seal element paired with a rubber energizer and quattro ring, offering durability and low friction in demanding reciprocating service.

Rated for pressures from 0 to 5,000 PSI and temperatures between -40°F and 220°F, it suits a broad spectrum of hydraulic cylinder environments. The groove diameter measures 4.384 inches, with a piston diameter of 4.999 inches, dimensions referenced for pistons without wear rings. Bronze filled PTFE construction resists wear and extrusion under load, making it well-suited for high-pressure piston seal applications.

SKU: PSQ-80

Supplier Part Number (MPN): PSQ-80

Alternate Part Numbers: C1KN11

Specifications

Bore 5	Bore Tolerance (in) +0.004/-0	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 4.38	Groove Width Tolerance (in) +0.005 / -0	Piston Dia. F 5.00	Seal Height B 0.27	Supplier Part Number PSQ-80	Alternate Part Numbers Alternate Part Number C1KN11	Product Weight 0.08 lbs

Similar Products

Model Number	Bore	Seal Height B	Groove Dia. E	Piston Dia. F	Bore Tolerance (in)	Groove Width Tolerance (in)
PSQ-40 Bronze Filled Piston Seal	2.5	0.271	1.884	2.499	+0.004/-0	+0.005 / -0
PSQ-48 Bronze Filled Piston Seal	3	0.271	2.384	2.999	+0.004/-0	+0.005 / -0
PSQ-56 Bronze Filled Piston Seal	3.5	0.271	2.884	3.499	+0.004/-0	+0.005 / -0
PSQ-64 Bronze Filled Piston Seal	4	0.271	3.384	3.999	+0.004/-0	+0.005 / -0
PSQ-80 Bronze Filled Piston Seal	5	0.271	4.384	4.999	+0.004/-0	+0.005 / -0

Product Questions & Answers (2)

Question by: Tommy G on Jan 24, 2026, 9:16 PM

What's the bore size this seal fits?

Answer by: Customer Support on Jan 26, 2026, 6:34 AM

The bore size for this Style PSC Bronze Filled Piston Seal is 5.00 inches.

Question by: Frank C on Aug 15, 2025, 3:28 PM

Got a cylinder with a 5-inch bore that needs a new piston seal. This the right fit for that?

Answer by: Customer Support on Aug 17, 2025, 10:40 AM

For a 5.00-inch bore cylinder, yes, this seal lines up with a piston diameter of 4.999 inches and a groove diameter of 4.384 inches. Worth noting those dimensions are given for pistons without wear rings, so if your piston runs wear rings, double-check your groove specs before ordering.