5/16-18 X 3.50" HEX CAP SCREW BOLT5/16-18 X 3.50" HEX CAP SCREW BOLT 81136, MFG# JJM05112, 50 PER BOX, GRADE 5, ZINC PLATED 5/16" Nominal Diameter, 18 Threads per Inch, 3-1/2" Bolt Length Under Head, 7/8" Thread Length, 1/2" Hex Wrench Required. T&S stocks Grade-5 hex cap screws with a minimal tensile strength of 120,000 PSI and a proof-stress load of 85,000 PSI. The core hardness is 25 to 34 Rockwell "C". You can identify grading on hex cap screws by the markings on the head. A Grade-2 will have no markings, a Grade-5 will have 3 even spaced radial lines on the head and a Grade-8 will have 6 lines. Zinc plating comes standard on all our hex cap screws and offer a fair amount of corrosion resistance but they are not recommended in outdoor or extreme conditions where other types may excel. We offer 18-8 and 316 stainless steel type, along with Grade-2 & Grade-8 type, call your T&S Salesperson for details!
Fasteners & Hardware Flange Bolts Screws Hex & 12 Point Head Flange Bolts - HCS5/16-18X3-1/2 - 5/16-18 X 3.50" HEX CAP SCREW BOLT
100% Satisfaction Guarantee: At Mansion Tools, we want to be sure that the item you choose is the right one for you. Within 30 days of delivery of your order, you may return any merchandise purchased from Mansion Tools in its original condition with your email order confirmation or packing slip. Restocking fees may apply. On items over $275 shipping within the US, we will even arrange free pick up or pay for returns shipping.