At Turn-Tex Machine, we stock seating nipples in 304 Stainless Steel. The 2 7/8″ EU 8rd Pin x Pin have a seal bore of 2.250″ or 2.280″. The 2 3/8 EU 8rd Pin by Pin features a seal bore of 1.781″. TTM also makes seating nipples with a wide range of threads, seal bores, or materials to meet our customers needs. Please call today for a quote.