US Stainless Stainless Steel 316 Chain Connecting Link 5/16 (8mm) Marine Grade Connector : : Tools & Home Improvement
5/16 Clevis Grab Hook - Grade 70 : Industrial & Scientific
Hillman Hardware Essentials 5/16 in. Clevis Grab Hook, Yellow Chromate, Grade 70 at Tractor Supply Co.
500cc Socket Lock Socketing Resin Kit
Gripon (Pack of 4) 5/16 Weld-On Forged Clevis Grab Chain Hooks - Grade 70 : : Industrial & Scientific
5/16 Clevis Grab Hook - Grade 70
Anchor hatch idea: Let me know what you think??
SEAFIT Trailer Hitch Balls
5/16 Connecting Link, HDG, 1,950 lbs. WLL, Import.