Lot of 20 SVSQS-M3-10 NBK Cross Recessed Flat Head M3 length 10mm Vacuum Vented Screws Made in JapanLot of 20 SVSQS M3 10 NBK Cross Recessed Flat Head M3 length 10mm Screws SVSQS M3 10 NBK Hex Socket Head Cap Screws with Captive Washer and Ventilation Hole. Pack of 20 NBK Hex Socket Head Cap Screws with Captive Washer and Ventilation Hole. Part Number M L D1 D L1 B t T (Approx.) d (max.) SVSQS M3 5 M3 10MM 5. 5MM 7MM 3MM 2. 5MM 0. 5MM 0. 7 1. 2 The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and