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Style PSC Bronze Filled Piston Seal, 3.50 Inch Bore Diameter, 2.88 Inch Groove Diameter, Inch Groove Width

Description & Features

This Style PSC Bronze Filled Piston Seal features a 3.50 inch bore diameter and a 2.88 inch groove diameter.

Constructed with a 40% bronze filled PTFE seal, rubber energizer and quattro ring, it is suitable for pressure applications ranging from 0 to 5,000 PSI and temperatures from -40°F to 220°F.

SKU: PSQ-56

Supplier Part Number (MPN): PSQ-56

Alternate Part Numbers: C1GN14, PSA-56

Specifications

Bore 3.50	Bore Tolerance (in) +0.004/-0	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 2.88	Groove Width Tolerance (in) +0.005 / -0	Piston Dia. F 3.50	Seal Height B 0.27	Supplier Part Number PSQ-56	Alternate Part Numbers Alternate Part Number C1GN14, Alternate Part Number PSA-56	Product Weight 0.06 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 (3)

Question by: Kent C on Oct 29, 2025, 8:49 PM

seal's rated up to 5,000 PSI, is that the ceiling for continuous use or just a peak rating?

Answer by: Customer Support on Oct 31, 2025, 6:36 AM

That pressure range covers the full operating window for this seal, from zero up to 5,000 PSI. It's not listed as a short-burst peak figure. The 40% bronze filled PTFE construction handles pressure loading well, and the rubber energizer keeps things seated under varying load conditions. Just keep in mind the piston diameter spec of 3.499 inches assumes no wear rings are in place, so factor that in when you're setting up your bore fit.

Question by: Peggy B on Feb 15, 2026, 6:25 AM

What's the temperature range this seal can handle?

Answer by: Customer Support on Feb 16, 2026, 3:08 PM

This seal is rated to handle temperatures from -40°F all the way up to 220°F.

Question by: Eddie R on Aug 21, 2025, 7:13 AM

got a cylinder with a 3.50 bore, is this seal the right size for that or am i gonna be fightin it?

Answer by: Customer Support on Aug 23, 2025, 6:36 AM

It matches a 3.50 inch bore and calls out a piston diameter F of 3.499 inches. The groove diameter is 2.884 inches, and the bore tolerance noted is +0.004/-0, so it’s intended for that bore size without needing to force it.