BOLT SCREW; TYPE: CYLINDRICAL HEAD SCREW WITH EXTERNAL HEXAGON NOMINAL THREAD DIAMETER: 2 IN; THREAD TYPE: 4.5" UNC; LENGTH: 10 IN THREAD LENGTH: 5 IN; SCREW STANDARD: UNDER FLAT; MATERIAL: STEEL 4140 TAMPER TAMPER-TEMPERED; TYPES OF MECHANICAL PROPERTIES: ACCORDING TO DRAWING; SPECIAL SCREW FOR COLLAPSE VESSEL COVER, DIMENSIONS ACCORDING TO DRAWING. COLLAPSE LABORATORY AREA - TM01-M-LAB02-0029445