1/4"-20 Stainless Steel Hex Screw Pack Multiple Types (20 pcs) Product Feature Standard 1/4"-20 hex screws for use Multiple threaded length: 9mm / 13mm / 16mm / 19mm Fits 4.7mm (for cup head) or 3.9mm (for button head) hex spanner Material: stainless steel Product Description This hex screw pack features standard 1/4"-20 male thread for use. This hex screw pack consists of five groups with threaded length respectively 9mm / 13mm / 16mm / 19mm. Each group contains four pieces of screws. Net Weight: 88.2 g You Get: 4 x 1/4"-20 Hex Screw Button Head with 9mm Thread 4 x 1/4"-20 Hex Screw Cup Head with 9mm Thread 4 x 1/4"-20 Hex Screw Cup Head with 13mm thread 4 x 1/4"-20 Hex Screw Button Head with 16mm Thread 4 x 1/4"-20 Hex Screw Button Head with 19mm Thread Before you place an order, please provide me with English information to facilitate our delivery and logistics