C9991 Series Screw 
(Hardwares Series For Connectors, Security Connections, Cable Assembly & Computer   Peripheral, Ect.)
•Screw Type: 42L4, 42H5.7, 48L4, 48H5.7
•Screw HEX Type: H5X6, R4.2X9.5, H48X10.5, SUS4.3X9.9