Countersunk socket head cap screws manufactured to GB/T 70.3-2008, DIN 7991 and ISO 10642 C have a 90° tapered head that seats flush in countersunk holes, leaving the assembled surface flat. Drive is via a hexagon socket key for recessed installation.

Available materials include carbon steel in property classes 4.8 and 8.8, and stainless steel grades 304 and 316. Surface finish options are black oxide, blue-white zinc and yellow zinc. Threads follow the relevant standard dimensions for the part designation.

They are typically specified for moulds, furniture, machinery, sheet metal work and automation equipment. Confirm required size, thread and finish when ordering.