Gasket Surface Finish

MILL FINISH - Some scale and light rust are apparent, surfaces may not be flat or parallel, slag removed. DEBURRED & DESCALED - improvement to mill, loose scale removed.		SURFACE GROUND - A non-concentric, abrasively machined surface with flat, parallel facings. 63-125 AARH.		SMOOTH SPIRAL/SMOOTH CONCENTRIC MACHINED- Lathe finish with shallow depth of cut, visually smooth. 100-150 AARH.
SERRATED SPIRAL/SERRATED CONCENTRIC MACHINED - Coarse lathe cut equivalent to 250-500 AARH.		RING JOINT MALE - Smooth machined surface is standard. Max roughness is 63 AARH.		RING JOINT FEMALE - Smooth machined surface is standard. Max roughness is 63 AARH.