I saw a PH3 screwdriver listed in a catalogue. I just wondered if
anyone had ever seen/used a PH3 screw?
Is there anything above PH3 and PZ3? What's the widest flat blade
screwdriver you can have before you call it a chisel?!
PZ3 is common for larger size screws, I have driven moderate length #12
screws with these heads and they have been fine but I've had bother with
larger frame fixings that use PZ3, the bit just can't transmit the
torque reliably without the risk of destroying the screw thread.
For larger fixings I now pay a little extra for torx head screws and
I've not had a failure since.
Googling for Pz4 suggests they do exist, dare you search higher?
FIVE TV's superbright logo - not the DOG's, it's bollocks
Thanks everyone for the replies so far. A lot of people are posting
about PZ3. I think they are quite common; I was wondering more about
PH3: has anyone ever seen or used those?
Re. PZ3 I have encountered them on 12 gauge screws. What do you
consider a moderate length? I think I have used up to 4 inch screws
I tend to use hammer fixings rather than frame fixings, though is
their really any difference? The only difference I can see is that
frame fixings have those two protrusions at the end, which I think are
supposed to stop them rotating, though why would rotation be a problem
when they are a symmetrical design? I read somewhere that hammer
fixings use a stronger screw to take the force of being hammered but I
wonder whether manufacturers really use two different types of screw
in frame and hammer fixings? Wouldn't it be cheaper and easier for
them to sue the same in both? I accidentally hammered in some frame
fixings the other week (I wasn't concentrating when I bought them) but
they seem to have survived!
I had to buy one many years ago to adjust the hinges of a car. Can't
remember what the car was, nor where the screwdriver is at the moment.
That was the largest one I ever bought.
Probably, but I have never come across anything bigger than a size 3 head.
What's the widest flat blade
When I was on the tools working on Tornado development aircraft, the
forward jacking point blank was approaching an inch and a half head
diameter. Your average DIY screw driver would just make a mess of the
slot in quite a short time.
But surely, a screwdriver could never be considered a chisel, even
though a screw driver is used in many situations other than screw
Really? Do you mean for cam locks, like these:
I saw these in an Ikea cupboard once but I never realised they were
PH3; I think I used a slotted driver. At last a PH3! Thanks.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.