The Hercules Sealing Products Style PSC Polyurethane Double-Acting Piston Seal is engineered for demanding hydraulic applications requiring reliable sealing performance. Designed for a 4.00-inch bore diameter and a 3.63-inch groove diameter, this piston seal ensures optimal fit and function. Constructed from durable 95A polyurethane with a 70A nitrile energizer, it offers excellent resistance to wear and tear, suitable for pressures ranging from 0 to 5,000 PSI.
With a temperature range from -65°F to 220°F, this seal is ideal for various industrial environments. The precise groove width tolerance of +0.005/-0 inches ensures consistent sealing efficiency, while the piston diameter tolerance of +0/-0.004 inches provides a snug fit, enhancing the seal's performance and longevity. The Hercules Sealing Products brand guarantees quality and reliability in every component.
SKU: PSC-342-WB
Supplier Part Number (MPN): PSC-342-WB
Alternate Part Numbers: C1KM98
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Specifications
Bore
4
Bore Tolerance (in)
+0.004/-0
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Groove Dia. E
3.63
Groove Width Tolerance (in)
+0.005 / -0
Piston Dia. F
4.00
Piston Dia. Tolerance (in)
+0/-0.004
Seal Height B
0.37
Supplier Part Number
PSC-342-WB
Alternate Part Numbers
Alternate Part NumberC1KM98
Product Weight
0.04 lbs
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Model Number
Bore
Seal Height B
Groove Width D
Groove Dia. E
Piston Dia. F
Bore Tolerance (in)
Groove Width Tolerance (in)
Piston Dia. Tolerance (in)
Price
Action
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PSC-334Double-Acting Piston Seal
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PSC-334-WBDouble-Acting Piston Seal
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0.37
2.624
2.997
+0.004/-0
+0.005 / -0
+0/-0.004
PSC-338Double-Acting Piston Seal
3.5
0.255
3.125
3.498
+0.004/-0
+0.005 / -0
+0/-0.004
PSC-342Double-Acting Piston Seal
4
0.255
3.625
3.998
+0.004/-0
+0.005 / -0
+0/-0.004
PSC-342-WBDouble-Acting Piston Seal
4
0.37
3.625
3.998
+0.004/-0
+0.005 / -0
+0/-0.004
PSC-350Double-Acting Piston Seal
5
0.255
4.636
4.999
+0.004/-0
+0.005 / -0
+0/-0.004
PSC-433-WBDouble-Acting Piston Seal
6
0.5
5.521
5.999
+0.004/-0
+0.006 / -0
+0/-0.004
Product Questions & Answers (1)
Question by: Randy W on Dec 10, 2025, 7:51 AM
What's the deal with the temperature this seal can handle?
Answer by: Customer Support on Dec 12, 2025, 6:09 AM
It's rated to handle temperatures from -65°F to 220°F. That makes it suitable for a fair range of industrial environments.