Top Shelf Alloy Steel Hex Socket Head Cap Screws 3/8 16 X 6-1/2 Partially Threaded Fasteners With Black Oxide Finish And Easy Grip Hex Key Spanner For Real Hardcore Projects

Heavy Duty Hex Socket Cap Screw Kit Inch Metric
✔️ 2 pcs grade 12.9 alloy steel hex cap screw plus wrench

This handy two piece kit packs heavy duty hex socket head cap screws built for serious automotive builds and industrial fix ups where regular bolts just strip out.

✅ 3/8-16 thread pitch meeting 0.368 inch diameter spec with 9.35mm metric equivalent
✅ Six and a half inch overall length delivering 1.5 inch partial thread engagement for 38.10mm run
✅ Full 14.00mm head diameter translates to 0.551 inch width across flats with 9.53mm height
✅ Core metallurgy forged from 40Cr alloy steel hitting hrc 39 to 44 toughness rating
✅ Black oxide layer keeps bare shanks clean under oily shop floor conditions
✅ Dedicated chrome vanadium wrench sized 5/16 inch fits recesses perfectly with 8mm metric equivalent

💡 What is a hex socket head cap screw used for in heavy machinery repairs?

This internal drive fastener solves tight clearance headaches when you need reliable torque transfer without bulky heads catching on nearby components. - Standard hex geometry lets you turn tools at sharp angles in cramped engine bays and transmission housings - The partially threaded shank maintains full shear capacity while the smooth grip section locks firmly against joint slip - Class twelve point nine alloy construction handles intense vibration cycles without loosening up during demanding service runs - Protective plating shields bare threads from shop grit and moisture without messing with calibration values ✝️