Has anyone seen a fastener like this before? I was trying to remove the casters from a dolly cart to give it some R&R and encountered this fastener which seems to have no normal means of removal. The head look like a carriage bolt head, and the shaft is threaded, but the nut looks more like nut-sert. How were these tightened to begin with? Why would they use something like this? Thanks for any info.
Has anyone seen a fastener like this before?
- Thread starter Zeke60
- Start date
38 Dodge Coupe
ALLIANCE MEMBER
On my 2010 GMC Sierra there are 3 bolts that hold on the fuel pump control module. They are M6x1x27 They have a torx head on the top of the bolt and on the bottom they have an inverted torx fitting that you use to tighnten the bolt as access to the top is limited. They are not exactly the same as yours, but I think something similar may have been used on your cart. I suspect you might be able to take that apart if you used a vice grip on the bottom to remove the bolt. Then you could use replace it with a bolt and nut combination of your choosing. 
We use that style for some assemblies on jails. The drive portion breaks off the head when it reaches its torque value. One time / one way use only. I’d soak the **** out of them with penetrating fluid and get some left hand drill bits or you might try vise grips or even grinding off the heads.
PassnThru
Well-known member
I like that idea - now that you mentioned it they do look plastic.
CRodi
Member
I believe a popular trade name is "Huck Bolt" . They're basically a fancy 2 piece rivet, installed with a hydraulic hand held tool that snaps the tail piece off at a pre-determined torque, making them basically goof proof. As mentioned, they are a one time use only. When encountered I'd just cut them off with a torch. If you don't want to replace with another "Huck" just replace with a nut and bolt. I've seen them used in the trucking and railway industry. Not sure about airplanes, as I don't have any experience with air craft.
gahrajmahal
Well-known member
I learn something new every day, Huck bolt…
Grind a slot in the head and try a flat tip screwdriver?
Last edited:
ZRX61
Well-known member
Used in aviation.
Old Man Roger
Well-known member
Grind the head off, then once you remove the caster there should be enough left to grab with vise grips.
on a Huck fastener, the threads are not threads but serrations formed on the fastener shank.
The collar is sweged onto the fastener shank with a special installation tool.
Best thing is to cut them off and replace with a standard nut and bolt.
The collar is sweged onto the fastener shank with a special installation tool.
Best thing is to cut them off and replace with a standard nut and bolt.
looks like the bottom thread shows an area that has snapped off, I am in the camp where it snaps off at a given torque .
Firebrick43
Well-known member
Truck (large) frames are almost universally assembled with huck bolts. Many aluminum cabs are also assembled now with small huck bolts as opposed to rivets
chris142
Well-known member
Those are huck bolts. Our peterbilts have them on the frame they are more like a rigid and must be cut off.cant be unscrewed.
Old Man Roger
Well-known member
Even if you cut the head off? That *****.
Firebrick43
Well-known member
They punch out if you cut the head off.
JABgj
Well-known member
Small version of a huck bolt. They are swaged (crimped) on and not reusable. Cut the bolt off at the top of the nut and then split the nut towards the head of the bolt as far as you can without hitting the part you want the save. Split the nut the rest of the way with a chisel and toss the bits in the trash. Replace with fresh hardware and you are done.
Meursault74
Well-known member
I've never seen those before. Leaned something new.
Here's an illustration of how it works.
www.hfsindustrial.com
Here's an illustration of how it works.
How Huck® Works | Howmet® Fastening Systems
Huck is the leading name in engineered joining solutions for major OEMs around the world. Learn about HuckBolts and Huck structural blind rivet here.
www.hfsindustrial.com
Old Man Roger
Well-known member
Ahh ok. I was incorrectly thinking the swaged part was actually connected to the caster plate.
So once the head is ground off, the caster plate will still be usable.
Now that I think about it, I think I’ve cut some of these off before. Used to work on trash trucks back in the day, mostly Macks.
jack stand
Well-known member
Are the castor's special?
New castor's and carriage bolts (through and nutted) would leave the same looks from the top using a non plated bolt.
New castor's and carriage bolts (through and nutted) would leave the same looks from the top using a non plated bolt.
finn
Well-known member
I’m late, as usual, but before reading the complete original post, my mind shouted out “Huck Bolts !”