12N5107 up for sale is a new flanged bushing made of thin stamped metal with a seam, the interior of this bushing bearing is coated with what look like teflon or a friction reducing material, the bushing is a metric size 18 OD x 16 MM ID x 17 MM long the major flange measures around 24 MM , the outside is marked as follows 3037B 3657  PBG 16 18 17 F also covered under Military NSN 3120-01-557-5494 p/n 037187 , nice bearing or bushing for any project, buyer to pay calculated shipping and packing to your locations, see our store we are adding new items each day, thank you RWK.