What is this bolt buffer made of? Polyurethane? Nylon? Something else entirely?
865271
My guess is poly. Its pretty stiff. But does help the metal on metal "clinging"
947173
I would say yes. Appears that the metal bolt may be stainless. Rest is heavy duty composite nylon type material. Trust this helps.
1225581
It is polymer. I would add that it appears quite sturdy and durable, though admittedly I have not properly tested it. The fit on my Core15-M4 is perfect. One drawback in my opinion is that it is quite difficult to switch between the large and small apertures. Selecting apertures requires too much work and fine manipulation and therefore cannot be done "on the fly." All in all, I'd say it's worth the price but would like to see an improvement to the aperture selection feature.
1902713
There are some small bits that Might be metal (collars of couplings). The rest is 100% PLASTIC. Stainless finish...plastic....flex hose...plastic...threads on couplings....plastic.
43300
I believe is made of nylon--has a 30,000 Pound rating. We have used it to pull another Jeep out of mud when Jeep was stuck. We bought two initially--highly recommend.
2051286
It is aluminum. my suggestion would be to install two 5/16" nut-sertrs (aluminum). They work like pop rivets, and attach with stainless bolts. Good luck!
1330396
Just nylon bushings, good enough for the application. This is not a $1000 jib. Go to Cinevate if you want roller bearings.
1323785
I think they are polymer and metal, maybe aluminum. I have a set of these and they are very good. Didn't see any reason to buy $250+ metal sights when I could get these for around $100 and they're spring loaded popup. Have an an AR I built myself and they're fine.
855634
This is a combination of plastic and nylon. Unsure of toxicity, but it is a very well made product, and is very strong. Mine came as part of a sewer clean out unit for my rv called sewer solutions. I ordered a second to have a spare water line connection.
1402770
It is aluminum, my ol one was just a rubber grommet with a insert. The insert melted on overheating. This one works the same way!
1570204
Apply more pressure. It's a lock nut the white cushion is nylon to hold the bolt in place
714034
Looks like plated steel. Nothing special, regular nuts and bolts. Use mine for fog lights on a 1 ton truck and field lights on a tractor. Work well!
959754
I think it was aluminum but don't remember. I returned it as spigot leaked.
1608526
It is copper plated steel core. Not a good substitute for solid copper in high bandwidth applications.
1244056
The fitting appears to be copper. The spring material is unknown but durable. I've used it for over a year in and around salt water with no issues.
150577
The Helicoil you asked about is right for the size bolt you are using. You need to redrill the hole to 21/64". Use drill press if you can. As to the grade specs Helicoil would be the best place to go.
1834895
I do believe they are made of Nylon. Very sturdy and solid. They worked very well. I felt very safe.