Product Name: DIN7997 Wood Screws Half Thread Model NO.: DIN7997 Type: Fasteners Material: metal Technics: Casting Surface Treatment: Yes Certification: CCC, SGS Application: Machine Parts, Transportation Trademark: NUTE Transport Package: Box, Carton, Pallet Specification: DIN,ANSI,BSW,JIS,GB,AU,ISO Origin: China HS Code: 73181400 Product Description Head: PanDia of Thread: 2.2~6.3mmLength: 6mm~150mmMaterial: Stainless steel, Carbon steel, Brass ectStandard: DIN, ASIN, BS, JIS, ISO, AU ectSelf-tapping is the ability of a screw to advance when turned, while creating its own thread. This ability is sometimes created by a gap in the continuity of the thread on the screw. These edges cut a thread as the screw is driven in to the material. The cutting edge drills away the material, leaving a hole for the screw to go into.Self-tapping screws are used in a variety of applications ranging from DIY to surgery. A dental implant is an example of a self tapping screw used in surgery.Shanghai Nute Hardware Inc. Limited and Shanghai NUTE import & EXPORT Co., Ltd. Offer products made of stainless steel material for the 302, 304, 316 and materials such as carbon steel 1008, 1010, 1022, 1035, 1045 bolts, screws, nuts, washers, thread rods and so on.Products can be GB (GB), DIN (German standard), ISO (international standard), ANSI (American Standard), AS (Australian Standard), BS (British standard), JIS (Japan standard) its size range are: Diameter (5 cm -70 cm) in length (10 mm -2000 mm), also in accordance with customer drawings production of non-standard parts.