SCREW MACHINE HEX. HEAD PRECISION STEEL TO SIZE M20 X 40 MM LONG TO SPECN. IS: 1364- PT- 2- 83 CONFORMING, WASHER KEY TO DRG. NO. IFL 8233. DS CAT NO. 5310- 238717, WASHER SPRING TENSION SINGAL COIL TYPE A PHOSPHATED M- 20 TO SPECN. IS: 3063- 72 TO DS CAT NO. 5310- 001, WASHER, SPRING STEEL S. COIL BYPE A, SIZE M16 TO SPECN IS: 3063- 72, PHOSPHATE COATED, PIN TO DRG NO. ILG- 1508/ IWP- 1972, D. S. CAT NO. 5305- 003152, SCREW MACHINED CSK HEAD M5 X 12 MM LONG TO SPECN. IS: 1365, CAT. NO. 5320- 000761, RIVET CSK HD, 90 DEGREE STEEL 6 X 16 MM MM LONG TO SPECN. 2998, RIVET FLAT HEAD DIA 5MMX65MM LONG TO SPECN IS: 2155- 1982