MetalMech Engineering manufactures Brass Inserts Shapes. MetalMech Engineering is an ISO 9001:2008 Certified Company. Brass Inserts Shapes come in various shapes: round knurled inserts, hexagonal inserts and square inserts. They come as both blind and through inserts. Brass Inserts Shapes knurling are available as diamond, straight and unidirectional shapes. Salient Features of Brass Inserts Shapes include deep groove for maximum pull out resistance available. Inner Diameter [I/D] after Threads with very close tolerance to prevent unnecessary flush to enter into the inserts is also provided in the Brass Inserts Shapes.