STANDARD PARTS 8 899 BALLS DIAMETER PART NO MATERIAL 1 UNIT PKG B 453626 Stainless Steel 1 5 gz iwt 2120 Aluminum 25 is 7002117 Stainless Steel 25 104918 Steel 5 9 gz 7808541 Steel 50 5 1a 104919 Steel 5 a 453593 Steel 5 az 119282 Steel 5 7 isn 453595 Steel 5 Z 453578 Steel 5 9 ian Steel l 8 900 HEXAGOIII HEAD BOLTS NOTE Bo ts are grouped by size All bo ts having the same diameter and threads per inch are grouped together Diameter is the 17rst number or fraction Threads per inch is the second number Fo lowing that is the length All hexagon head bolts in group 8 900 are G I I Grade 280 M steel 4 are cadmium or zinc plated except phosphate coated bo ts which are noted by an asterisk MATERIAL IDENTIFICATION GRADE u Q lz l S l l V GM 260 M GM 280 M GM 290 lM GM 300 M N0 TE The ident Hcation marks and corresponding GM material number indicate the metallurgical specifications adhered t0 in the making of a particular bolt lncreasing numbers represent increasing tens e strength THREAD I UNIT SIZE LENG TH PART NO GRADE PKG 8 32 8 455957 1 10 24 Z 9417075 1 l 10 24 1 3748777 1 10 24 l N 454774 1 10 32 1 274846 1 10 32 1 Z 3166753 1 10 32 4 4916380 1 20 l Z 180016 100 20 E B 180018 100 l I 20 E I 454894 300 M 1 20 3 180020 100 1 4 20 4 3877199 4 20 7 180021 1 4 20 l S 445566 1 20 l 180024 1 4 20 I z 180034 1 1974 CHEVROLET IVIOTOR DIVISION GENERAL MOTORS CORPORATION P A 24 sp as 8 899 8 900