stainless steel screw
stainless steel screw
(OP)
hi,
i need to know the code for a peculiar type of protruded head stainless steel screw. the one i've seen has the hexagonal head socket that goes through the entire length (i.e. there is an hexagonal cavity inside the threaded shank).
thanks a lot
i need to know the code for a peculiar type of protruded head stainless steel screw. the one i've seen has the hexagonal head socket that goes through the entire length (i.e. there is an hexagonal cavity inside the threaded shank).
thanks a lot





RE: stainless steel screw
RE: stainless steel screw
understood more or less? (i've briefly designed it using sketchup)
thanks for helping
RE: stainless steel screw
Do you have one of these? Does it have any markings on it?
RE: stainless steel screw
i've seen it past week in a nautical store and was unmarked.
it's a strange piece, yes.. but perfect for my purpose.
thanks again
RE: stainless steel screw
RE: stainless steel screw
we made the things entirely in house with a Hardinge screw machine and broached the hex. I have never seen another until I saw your sketch.Unfortunately that machine shop was bought out and closed in the early 1980's.
B.E.
RE: stainless steel screw
My gut reaction was its a security screw. You drop it into a cavity onto a hex type "key" and then you can turn the key easily. No allen sockets are that thin and long that I know of. Best guess is its the key to Fort Knox but only for those in the know ;) lol
RE: stainless steel screw
i think i'll have to review my ideas..
thanks again for helping.
best regards
RE: stainless steel screw
RE: stainless steel screw
RE: stainless steel screw
Do you need the internal hex opening all the way through the shaft and head, or only in the cap-screw head part, or only in the shaft part?
Can you live with a round hole at one end or the other? If so, would that round hole need to be larger than the hex opening (tip-to-tip), or internal to the hex openingflat-to-flat?
Do you need external threads at all, just on the end of the bolted shaft, or all the way up the external bolt shaft to the bottom of the head? Can the cap-screw head be square or hex itself? Knurled?
RE: stainless steel screw
RE: stainless steel screw
I have seen vented screws which had a round hole all the way through.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: stainless steel screw
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RE: stainless steel screw
Misumi do through hole screws:
http://uk.misumi-ec.com/pdf/fa/p1359.pdf
They also do specials
RE: stainless steel screw
i can't ask to nautical store where they bought them since the nautical store itself is attempting to sell me them for 10 euros the pair.. i won't receive any good indication for sure.
what i need is having the metric thread outside and an internal hole to fit a 5mm dia shaft (a circular hole would be perfect as well).
nautical store parts are always expensive and unfindable (that's why they can sell them to 5 euros each).
the fastest solution could be reaming a 5mm dia hole on each stainless screw one by one or, better, review my design using a drilled plate with two screws to grab it to fiberglass (i.e. something like a nutplate without thread).
i'll go on searching for now..
thanks you all again guys for precious attention
cheers
RE: stainless steel screw
Not sure which eurozone country you're in but if you have an equivalent to Mcmaster-Carr or the like then they may even be able to help.
A google search of 'metric vented screw' will turn up plenty of results.
Now if you need the vent holes to be precision, then it might be trickier.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: stainless steel screw
If so you might think about cutting a flat blade screw driver slot in the tip.