Stainless Steel Stub End: ASTM A403 WP304 Stub Ends, Seamless Welded, Size 6 Inch, Schedule 40S, Standard ANSI B16.9, Beveled Ends. Keywords: Stainless Steel Stub End, SMLS, A403 WP304. Name: Stub End. Material: ASTM A403 WP304. Size: 6 Inch. Schedule: SCH 40S. Standard: ANSI B16.9. Ends: Beveled Ends.