Skip to the beginning of the images gallery

Style 1400 Glass-Filled PTFE Piston Seal, 3.75 Inch Bore Diameter, 3.36 Inch Groove Diameter, Inch Groove Width

Bore 3.75	Bore Tolerance (in) ±0.002	Cross Section Tolerance (in) ±0.010	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 3.36	Groove Width Tolerance (in) ±0.002	Piston Dia. F 3.75	Piston Dia. Tolerance (in) ±0.001	Seal Height Tolerance (in) ±0.010	Supplier Part Number PS1400-60	Alternate Part Numbers Alternate Part Number C1DH53, Alternate Part Number MI-01035451, Alternate Part Number MINO-00407X30032	Product Weight 0.02 lbs

Product Questions & Answers 3

Product Questions & Answers

got a cylinder with a 3.75 bore, will this style 1400 seal fit the piston and groove sizes you’ve got listed?

Question by: Rex G on Oct 6, 2025, 1:25 PM

Fit comes down to the bore, piston diameter, and groove diameter numbers. This seal is matched to a 3.75 inch bore (±0.002), a 3.746 inch piston diameter (±0.001), and a 3.358 inch groove diameter, with the seal height and cross section held to ±0.010.

Answer by: Customer Support on Oct 8, 2025, 7:30 AM

What's the temperature range this seal can handle? Just makin' sure it'll hold up in my application.

Question by: Neil D on Sep 12, 2025, 3:48 PM

It's rated to handle temperatures from -40°F up to 220°F.

Answer by: Customer Support on Sep 14, 2025, 11:15 AM

Got a 3.75 inch bore hydraulic cylinder that needs a new piston seal. This the right fit for that?

Question by: Dwayne A on Jan 2, 2026, 9:10 PM

For a 3.75 inch bore, this seal is built to match that exactly, with a bore tolerance held to plus or minus 0.002 inches. The piston diameter it's sized for is 3.746 inches, with a tighter tolerance of plus or minus 0.001 inches. As long as your cylinder and piston dimensions are in that range, you're looking at a proper fit. The groove diameter on the seal side comes in at 3.358 inches, so double-check your groove dimensions before ordering to make sure everything lines up.

Answer by: Customer Support on Jan 4, 2026, 5:42 PM

Similar Products

Model Number	Bore	Groove Dia. E	Piston Dia. F	Bore Tolerance (in)	Cross Section Tolerance (in)	Seal Height Tolerance (in)	Piston Dia. Tolerance (in)	Groove Width Tolerance (in)
PS1400-40	2.5	2.108	2.496	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-56	3.5	3.108	3.496	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-80	5	4.608	4.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-24	1.5	1.24	1.497	±0.002	±0.005	±0.005	±0.001	±0.002
PS1400-26	1.625	1.233	1.622	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-28	1.75	1.358	1.747	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-32	2	1.608	1.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-36	2.25	1.858	2.246	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-44	2.75	2.358	2.746	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-48	3	2.608	2.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-52	3.25	2.858	3.246	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-60	3.75	3.358	3.746	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-64	4	3.608	3.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-72	4.5	4.108	4.496	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-96	6	5.482	5.996	±0.002	±0.005	±0.005	±0.001	±0.002