$5.74
This is the Part# 23970121, a 55 mm x 3 mm O-ring made from high-quality Viton rubber . It is a direct replacement seal used on Ebara, Leybold, and Pfeiffer vacuum pumps including Ebara D40BCS, Ebara D65BCS, Leybold Trivac series, and Pfeiffer UNO30M models . You will also find this O-ring included in several major seal kits and repair kits
O-ring, 55 x 3 mm - Viton, Part# 23970121
O-ring, 55 x 3 mm - Viton, Part# 23970121
Some O-rings only fit one pump. This one is different. The 23970121 works on pumps from three major brands: Ebara, Leybold, and Pfeiffer.
That makes this little ring very useful. If you have different pumps in your shop, this one part can help you fix several of them.
Exact Size, Perfect Fit
This O-ring measures 55 mm inside diameter. The rubber thickness is 3 mm .
These exact dimensions mean it fits right the first time. No stretching. No cutting. No forcing. Just a clean, tight seal.
This O-ring works on several different pump models:
Ebara Pumps:
D40BCS
D65BCS
Leybold Trivac Pumps:
D40BCS
D65BCS
Pfeiffer Pumps:
UNO30M
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