The PO (standard) series external retaining ring features wide "ears" (resembling those of a poodle dog; hence the name) which offer extra surface area and better retention against the retained part. PO series rings also come in thinner widths with identical shaft sizes and are known as POL (light)
With regards to the PO/POL series retaining rings, only the black phosphate coated (PO-PA) and (POL-PA) rings are listed in this database, however other finishes are available upon special request
Alternate Finishes Available:
(PO/POL-H) Stainless Steel - PH 15-7 Mo is an extra strength corrosion-resistant stainless steel, capable of preventing atmospheric oxidation at temperatures up to 900ยบ F
(PO/POL-ZD) Yellow Zinc Dichromate - It affords the metal excellent salt spray protection (96 hours) and is particularly effective for applications exposed to seawater. This retaining rings zinc plated finish utilizes a mechanical plating process which effectively eliminates hydrogen embrittlement