(12 pcs) 1/2\-13 X 1-1/2\
- Penta bolts have a five-sided pentagon-shaped head offering a minimum level of tamper-resistance..
- Penta head bolts are commonly used to secure ground lids and manhole covers..
- Type 316 stainless steel is considered "marine grade"..
- Stainless steel significantly improves resistance to tarnishing or corrosion..