Hex Head Bolt readily available in US with 12.9 equivalent rating or +
Hex Head Bolt readily available in US with 12.9 equivalent rating or +
(OP)
Hi,
We are currently searching a fastener, that is readily available in the USA in quantities of 50 maximum say, with a hex head and nut that has a 12.9 or equivalent tensile strength. I come from an Australian engineering background and am unfamiliar with the USA market. I am only familiar with 10.9 that we sometimes use on trucks. Currently we buy Unbrako brand socket head cap screws (to achieve the greater strength of 12.9) and the question came up from my boss who detests them due to their serviceability in the field requiring special allen type keys wrenches. Maybe this is a question for the aeronautical boys but then again they probably only use titanium and aluminium due to the cold temp.
Really we would prefer the UNC thread form due the availaility of 2H and equivilent nuts.
Cheers,
Exdrill
We are currently searching a fastener, that is readily available in the USA in quantities of 50 maximum say, with a hex head and nut that has a 12.9 or equivalent tensile strength. I come from an Australian engineering background and am unfamiliar with the USA market. I am only familiar with 10.9 that we sometimes use on trucks. Currently we buy Unbrako brand socket head cap screws (to achieve the greater strength of 12.9) and the question came up from my boss who detests them due to their serviceability in the field requiring special allen type keys wrenches. Maybe this is a question for the aeronautical boys but then again they probably only use titanium and aluminium due to the cold temp.
Really we would prefer the UNC thread form due the availaility of 2H and equivilent nuts.
Cheers,
Exdrill





RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
Any good local hardware store, farm/fleet supply, and the like will carry these fasteners, as does McMaster Carr, which Will posted.
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
american fasteners fabricates bolts only up to 150000 psi or grade 8. I need 12.9 which has approx 20% higher tensile strength
I found a company SPS which supply the unbrako brand capscrew and they have umpteen amounts of aviation bolts with high tensile strengths and hex heads. Ill give them a call and let you all know of the availability to the public but this is all I can come up with.
Another great question (for me anyway), Has anyone heard where to buy alloy bolts grade 14.9 (see this thread where the guy mentions it as though they are popular thread725-68155: Very High Strength Bolts)? Thats a serious bolt. I'm not galvinising them so I'm not worried about his hydrogen embrittlement issues.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
Just had a look and their zinc plated. Anyone know if you can get them in black. Hydrogen embrittlement is a killer!!
Great to know of the grade 9 (which is approx 12.9) though!
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
Don't know if they are readily available.
Regards
Mike
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
http://www.f911.com/fore2b.html
They offer in black
Ill call and see if they are readily available and get back to you all.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
http:/
rmw
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
http://arp-bolts.com/
You are getting in the tensile range and depending on your application that may require an external wrenching head other than hex. Our cutoff for hex head bolts was nominally 160,000 psi tensile where we started to require external wrenching bolts or nuts, in our case it was the "Super Torque Head. Any tensile strength above 125,000 psi we require only 6 point tools.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
I thought a hex socket was a 6 point tool though??? being a hexagon with 6 sides.
For the record guys, in the back blocks of africa only a select few carry allen keys and sorry I cant choose our clients, they choose us.
Unclesid might be onto it though. If I cant have a hex head I have to redesign and go bigger and grade 5, sorry boss!!!
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
Seriously, machinery, automotive & farm equipment suppliers generally have a supply of quality fasteners.
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
http:/
You might want to read the following thread in its entirety for more information. At the time Lawson Products was carrying the fasteners.
thread725-95071: supertanium bolts
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
RE: Hex Head Bolt readily available in US with 12.9 equivalent rating or +
My first real job after college was as a manufacturing process engineer for Ford. Of course they bought custom machine tools for everything. They were very fussy about the fasteners; everything was put together with hex socket head bolts or screws. The reason was simple; engineers like me could carry a full set of wrenches in a labcoat pocket for when adjustments were required. We also carried cigars in our pockets for use in bartering with union tradesmen. (I have no idea what sort of currency is now required in these tobacco-free PC times to secure a forklift quickly or to make a union steward disappear).
Much later, I worked on dirt bikes. Hex socket head fasteners are sometimes sold into that market, sort of a fashion trend that comes and goes. They're a nightmare on a dirt bike because you have to spend beaucoup time picking all the dirt out of the socket before you can get the wrench in. Phillips head screws are a much better choice because you don't have to get every fleck of dirt out in order to get the driver to engage, the tapered recesses are less likely to stay full of dirt, and a little fine dirt even keeps the bit from slipping.
For larger fasteners, out in the bush, from a service perspective, despite the extra weight of a set of proper wrenches, or even a rusty dull pipe wrench, hex heads are a better choice than hex socket heads.
Mike Halloran
Pembroke Pines, FL, USA