I’m wanting to install three eyebolts on each bumper of my full size, metal bumper van. However, I’m daunted by my lack of mechanical skills and severe poverty of tools, as well as the following perplexing engineering questions. Perhaps I could get some experience and thoughts.
- Even if I can find my drill, last seen in the 80’s, what kind of bit do I need to drill through a full metal bumper? Probably expensive.
- The hardware store has three kinds of eyebolts: zinc-coated, galvanized and stainless steel. Obviously I want bolts that will resist weather, but the SS ones are very expensive. What’s my best choice?
- I carry 1-3 boats. For best rope threading and tensioning, should I position the diameter of the eyebolts vertically (the hole going side-to-side) or horizontally (the hole pointing up and down)?
- The bumper shape is sort of like a curved ellipse. I could position the eyebolts straight out in front (3 o’clock), or pointing slightly upwards (2 o’clock), or slightly downwards (4 o’clock). Do you think it makes a difference for rope chafing and, well, bumping things with the bumper.
- I don’t want the bolts to rattle or fall off. On the inside of the bumper I assume I could put two nuts or a lock nut. Which is best and do I need a washer? What, if anything, do I put on the bolt outside the bumper to prevent it from wiggling – a nut, a nut and washer, or nothing needed at all?
This all seems so complex, and I left my physics in the West End Bar 45 years ago. Oh, how I envy those old ladies with the rec kayaks who just toss them in the beds of their pickup trucks or stuff them in the hatchbacks of their Subaru’s.