We call our big and long,security bolts “Mega Monster” because they require mega monster bolt machines to make them and required a mega monster investment that few are willing to take. We made the monster investment in the machinery,engineering,and have added “Make Your Own Mega Monster Bolt,” in order to supply effective solutions for big security needs. We are committed to offering Mega tamper-proof,security bolt solutions for your applications.

Mega Monster security bolts,nuts up to 5/8 (M16):
Keyrex ™,Keyedlok®,Penta plus™,Tam-6lobe™ and Hex-pin™
• 5/8 inch x 5 is maximum size (M16 x 130) •
Cold headed,requiring minimum quantities.

Penta Nut™
• Up to 7/8” diameters
• Made of 316 stainless:In stock

Mega Monster security bolts,nuts up to 1 1/4:
• Mega Monster Penta Socket bolt
• 3/4 to 1 1/4
• Milled:special order only.
• Cold headed,requiring minimum quantities.

Make your own Mega Monster security bolt
• Penta Nut + double end stud
• You pick the size and length
• Nuts up to 1 1/4 diameters.