Skip to the beginning of the images gallery

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

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

Product Questions & Answers 2

Product Questions & Answers

What's the bore size this seal fits?

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

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

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

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

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

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.

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

Similar Products

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