5/16-18 X 3.25" HEX CAP SCREW BOLT5/16-18 X 3.25" HEX CAP SCREW BOLT 81135, MFG# JJM05104X, 50 PER BOX, GRADE 5, ZINC PLATED 5/16" Nominal Diameter, 18 Threads per Inch, 3-1/4" 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!
Shipping Information: Weight 0.50 lbs
Fasteners Hardware Flange Bolts Screws Hex 12 Point Head Flange Bolts - HCS5/16-18X3-1/4 - 5/16-18 X 3.25" HEX CAP SCREW BOLT
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