350 HARDWARE & WIRING 5/8 (11) 5/8 (18) 1/2 (20) 1/2 (13) 7/16 (14) 7/16 (20) 1/4 (28) 1/4 (20) 5/16 (24) 5/16 (18) 3/8 (24) 3/8 (16) 10/32 8/32 4/40 10/24 6/32 IDENTIFY YOUR BOLT THREAD - SCALE 1:1 6/32 8/32 10/32 10/24 12/24 1/4-28 1/4-20 5/16-24 5/16-18 3/8-24 3/8-16 7/16-20 7/16-14 1/2-20 1/2-13 Length 25pk 25pk 25pk 25pk 25pk 25pk 25pk 25pk 25pk 25pk 25pk 1/4" 975105 975106 975104 975107 -- -- -- -- -- -- -- -- -- -- -- 3/8" 975098 975095 975083 975085 -- 975100 975108 -- 975102 -- -- -- -- -- -- 1/2" 975093 975096 975099 975087 -- 975117 975111 975152 975127 975123 975166 -- -- -- -- 5/8" 975202 975097 975126 975103 -- 975101 975121 975122 975119 975180 975137 -- -- -- -- 3/4" 975094 975114 975115 975110 -- 975118 975139 975136 975140 975162 975165 -- -- -- -- 7/8" -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1" 975138 975125 975116 975209 -- 975211 975215 975222 975168 975231 975235 1 1/4" -- -- 975161 975160 -- 975212 975216 975223 975226 975232 975236 1-1/2" -- -- 975208 975210 -- 975213 975217 975224 975227 975233 975237 1 3/4" -- -- -- -- -- -- 975219 -- 975228 -- -- 2" -- -- -- -- -- 975214 975220 975225 975229 975234 975238 2-1/2" -- -- -- -- -- -- 975221 -- 975230 -- 975239 Length 5pk 5pk 5pk 5pk 5pk 5pk 5pk 5pk 5pk 5pk 5pk 1" -- -- -- 525037 -- 525062 525052 950548 -- 950554 950557 -- -- -- -- 1 1/4" -- -- -- -- -- 525063 525053 950549 950552 918229 950558 -- -- -- -- 1-1/2" -- -- 525047 525039 -- 525064 525054 950550 950553 950556 950559 -- -- -- -- 1 3/4" -- -- -- -- -- -- 525055 -- 525073 -- -- -- -- -- -- 2" -- -- -- -- -- 525065 525056 525079 525074 -- 525089 -- -- -- -- 2 1/4" -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 2-1/2" -- -- -- -- -- -- 525057 -- 525075 -- 525090 -- -- -- -- 1/4-20 5/16-18 3/8-16 Length 5pk 5pk 5pk 1" 911509 911653 911660 1 1/4" 911510 911654 911661 1-1/2" 911511 911655 911662 1 3/4" 911513 -- 2" 911515 911656 911663 2 1/4" 911517 911657 2-1/2" 911519 911658 911664 5pk & 25pk quantity To find out what bolt thread you have, just place your old bolt on the bottom of this page. Carefully check if the thread of your bolt is identical to the 'silhouette thread' as pictured. LIMIT, THREAD PITCH GAUGE Identify the threads on your bolt in case of doubt. Measures windings per inch (USA) or per millimeter (Metric). 521124 Metric + UNF/UNC (24 + 30 blades) 521125 Metric thread (24 blades) We have the FULL selection! Threads & sizes that are not mentioned are not produced by Gardner-Westcott GW - CARRIAGE BOLTS - CHROME GW - ALLEN HEAD SET SCREWS / GRUB SCREWS - PLAIN STEEL 521124 Metric + UNF/UNC 521125 Metric
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