5/16"-18 x 5/32" Hex Drive Cup Point Grade 18-8 Stainless Steel Socket Set Screw - Hollow-Lock / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 0.156 INCHES NOMINAL HEAD STYLE: C101 HEADLESS (SETSCREW) INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: 3805-01-533-1853 NOMINAL THREAD DIAMETER: 0.312 INCHES WIDTH ACROSS FLATS: 0.156 INCHES NOMINAL THREAD QUANTITY PER INCH: 18 PART NAME ASSIGNED BY CONTROLLING AGENCY: CUP POINT SOCKET SET SCREW - HOLLOW-LOCK MATERIAL: STEEL COMP 302 OVERALL THREAD SERIES DESIGNATOR: UNC