Parker/Commercial Intertech 391-2881-457 O-Ring

Parker/Commercial Intertech 391-2881-457 O-Ring is a Hercules catalog product available from WQC Parts for hydraulic cylinder, seal kit, pump, motor, valve, and heavy-equipment repair applications.

This listing uses Hercules part number CM-391-2881-457. Catalog description: OR-70NBR-2.625x3/32-C/S(20).

Product Details

• Hercules part number: CM-391-2881-457
• Product type: O-ring or sealing component
• Reference brand/application: Parker/Commercial Intertech
• Approximate weight: 0.003 lb
• Catalog data source: 2026 US Mobile Kit Catalog, 2026 Pump, Motor, and Valve Repair Kits

Catalog Application Data

• Catalog section: P75/76 SERIES; P75 PARTS BREAKDOWN; Gasket Seals > P76 PARTS BREAKDOWN
• Application reference: Pump
• Equipment type: Excavators
• Model or series reference: X73-37-10
• Material / grade reference: Seal
• Catalog page reference: 1202, 1206, 12, 16

Use this product when your parts book, service manual, cylinder repair list, pump/motor breakdown, or existing component calls for CM-391-2881-457. It is intended to help restore sealing performance, reduce leakage, and support reliable equipment repair when correctly matched to the application.

Fitment Verification

Before ordering, confirm the CM-391-2881-457 reference against your OEM reference number, machine model, cylinder location, bore and rod size, pump/motor series, and serial-number range. Manufacturer names and part numbers are used for identification and fitment reference only. If you are unsure, compare the old parts, measurements, and parts-book callout before installation.