What size is a Metric 6 screw?

Manfr3dManfr3d Registered Users Posts: 2,008 Major grins
edited January 27, 2008 in Accessories
I am researching quick release clamps and I was
wondering if the term "Metric 6" or M6 is the same
as 3/8" inch screw?
“To consult the rules of composition before making a picture is a little like consulting the law of gravitation before going for a walk.”
― Edward Weston

Comments

  • z_28z_28 Registered Users Posts: 956 Major grins
    edited January 25, 2008
    No

    3/8" equals about 9.5mm
    D300, D70s, 10.5/2.8, 17-55/2.8, 24-85/2.8-4, 50/1.4, 70-200VR, 70-300VR, 60/2.8, SB800, SB80DX, SD8A, MB-D10 ...
    XTi, G9, 16-35/2.8L, 100-300USM, 70-200/4L, 19-35, 580EX II, CP-E3, 500/8 ...
    DSC-R1, HFL-F32X ... ; AG-DVX100B and stuff ... (I like this 10 years old signature :^)
  • Manfr3dManfr3d Registered Users Posts: 2,008 Major grins
    edited January 25, 2008
    z_28 wrote:
    No

    3/8" equals about 9.5mm

    so what does the term "Metric 6" mean?
    “To consult the rules of composition before making a picture is a little like consulting the law of gravitation before going for a walk.”
    ― Edward Weston
  • z_28z_28 Registered Users Posts: 956 Major grins
    edited January 25, 2008
    Simple 6mm
    D300, D70s, 10.5/2.8, 17-55/2.8, 24-85/2.8-4, 50/1.4, 70-200VR, 70-300VR, 60/2.8, SB800, SB80DX, SD8A, MB-D10 ...
    XTi, G9, 16-35/2.8L, 100-300USM, 70-200/4L, 19-35, 580EX II, CP-E3, 500/8 ...
    DSC-R1, HFL-F32X ... ; AG-DVX100B and stuff ... (I like this 10 years old signature :^)
  • ziggy53ziggy53 Super Moderators Posts: 24,156 moderator
    edited January 25, 2008
    Metric and SAE are completely different and not interchangeable.

    Most true hardware stores will carry assortments of each.
    ziggy53
    Moderator of the Cameras and Accessories forums
  • BikePilotBikePilot Registered Users Posts: 99 Big grins
    edited January 25, 2008
    M6 means six mm in diamater, you still need to know the thread pitch (and of course length and head typ) to get anywhere though. The most typical thread pitch for a M6 screw would be 1.0. You can buy a thread pitch gauge for cheap if need be, othewise if you have a screw to match up go to the store and just lay the threaded portion of new scress on yours. If its correct all the little groves will match up with eachother.

    good luck
    Josh


    Sony DSC-S85 (point and shoot)
    Panasonic LX1
    Olympus 770SW

    In the market for a dslr
  • z_28z_28 Registered Users Posts: 956 Major grins
    edited January 25, 2008
    Not entirely true !

    There is 7 compatible sizes (standard sizes till 1")
    5/32 ---- 4mm
    5/16 ---- 8mm
    7/16 ---- 11mm
    15/32 --- 12mm
    19/32 --- 15mm
    3/4
    19mm
    29/32 --- 23mm

    Both 3/8" and 6mm aren't there.
    D300, D70s, 10.5/2.8, 17-55/2.8, 24-85/2.8-4, 50/1.4, 70-200VR, 70-300VR, 60/2.8, SB800, SB80DX, SD8A, MB-D10 ...
    XTi, G9, 16-35/2.8L, 100-300USM, 70-200/4L, 19-35, 580EX II, CP-E3, 500/8 ...
    DSC-R1, HFL-F32X ... ; AG-DVX100B and stuff ... (I like this 10 years old signature :^)
  • ZZR_RonZZR_Ron Registered Users Posts: 21 Big grins
    edited January 26, 2008
    z_28 wrote:
    Not entirely true !

    There is 7 compatible sizes (standard sizes till 1")
    5/32 ---- 4mm
    5/16 ---- 8mm
    7/16 ---- 11mm
    15/32 --- 12mm
    19/32 --- 15mm
    3/4
    19mm
    29/32 --- 23mm

    Both 3/8" and 6mm aren't there.

    They are not compatable..you can't trhead one into another. (or I know I wouldn't)

    The closest size to an M6 is 1/4". When I've had a striipped out m6 in the past, I've often tapped it out to a 1/4" NC to repair the thread, and then used a standard bolt to hold things together.
  • BikePilotBikePilot Registered Users Posts: 99 Big grins
    edited January 26, 2008
    Yep, you can say use a 5/16ths wrench on a 8mm bolt head, but you can't screw a bolt with metric threads into an SAE hole without damaging one or both. The pitch, depth and shape of the threads will always be different and even the diamater is not exactly the same - close enough for the purposes of a wrench, not close enough for much else.
    Josh


    Sony DSC-S85 (point and shoot)
    Panasonic LX1
    Olympus 770SW

    In the market for a dslr
  • puzzledpaulpuzzledpaul Registered Users Posts: 1,621 Major grins
    edited January 26, 2008
    << (and of course length and head typ) >>

    + ... if want to be particular :)

    Material (and grade of)
    Finish - if plated etc
    Thread form, since threads associated with cameras / tripods are 1/4 and 3/8 BSW ... and their UNC equivalents have same dia / pitch - but different thread form (55 / 60 deg)
    Plain shank length / dia - if any
    Tightening method (if not head)
    Anti-rotation feature (eg wiring)

    pp
    Website

    Flickr
  • ZZR_RonZZR_Ron Registered Users Posts: 21 Big grins
    edited January 26, 2008
    BikePilot wrote:
    Yep, you can say use a 5/16ths wrench on a 8mm bolt head, but you can't screw a bolt with metric threads into an SAE hole without damaging one or both. The pitch, depth and shape of the threads will always be different and even the diamater is not exactly the same - close enough for the purposes of a wrench, not close enough for much else.

    I guess that's what Z28 meant, was wrench sizes...I know I often use a 1/2" in place of 13mm, and 9/16 in place of 14 mm open end wrench, if it's what I have handy.

    I've been a mechanic of one sort or another here in Canada since the late 70's, and have thousands of dollars in SAE tools, that just never get used.

    Everything here is metric.
  • GrainbeltGrainbelt Registered Users Posts: 478 Major grins
    edited January 26, 2008
    ZZR_Ron wrote:
    Everything here is metric.

    Don't remind me - it has caused mass confusion for me the last 2.5 years.

    wave.gif Ron
  • ZZR_RonZZR_Ron Registered Users Posts: 21 Big grins
    edited January 26, 2008
    Grainbelt wrote:
    Don't remind me - it has caused mass confusion for me the last 2.5 years.

    wave.gif Ron

    Hi GB! It's easy once you get used to it. then you never want to go back to the old system...
  • ZZR_RonZZR_Ron Registered Users Posts: 21 Big grins
    edited January 26, 2008
    ZZR_Ron wrote:
    Hi GB! It's easy once you get used to it. then you never want to go back to the old system...

    BTW GB, didn't you buy a DSLR a little while ago??
  • GrainbeltGrainbelt Registered Users Posts: 478 Major grins
    edited January 26, 2008
    ZZR_Ron wrote:
    BTW GB, didn't you buy a DSLR a little while ago??

    Nope. I came *this* close.

    Ended up with a Canon S5IS (12x superzoom with awesome stereo video). I will probably have a DSLR within the year, but the S5 is a great on-bike camera, especially given the video mode, and the 35-430mm reach is too much fun to resist. It is also fully manual, so I'm learning a ton in the process. thumb.gif
  • z_28z_28 Registered Users Posts: 956 Major grins
    edited January 26, 2008
    Nice discussion about nothing :D
    Still 3/8" aren't even close to 6mm rolleyes1.gif
    D300, D70s, 10.5/2.8, 17-55/2.8, 24-85/2.8-4, 50/1.4, 70-200VR, 70-300VR, 60/2.8, SB800, SB80DX, SD8A, MB-D10 ...
    XTi, G9, 16-35/2.8L, 100-300USM, 70-200/4L, 19-35, 580EX II, CP-E3, 500/8 ...
    DSC-R1, HFL-F32X ... ; AG-DVX100B and stuff ... (I like this 10 years old signature :^)
  • GrainbeltGrainbelt Registered Users Posts: 478 Major grins
    edited January 26, 2008
    z_28 wrote:
    Nice discussion about nothing :D
    Still 3/8" aren't even close to 6mm rolleyes1.gif
    yeah, sorry about the ADV hijack there. :uhoh
  • ZZR_RonZZR_Ron Registered Users Posts: 21 Big grins
    edited January 27, 2008
    Grainbelt wrote:
    yeah, sorry about the ADV hijack there. :uhoh

    +1 Sorry about the Hijack! Grainbelt and I know each other from the other board...

    z28, you are correct, 3/8" is a long way from 6mm!!!

    GB, I use a Kodak 10X superzoom quite a bit, also with full manual modes...it takes great pictures for me...also thinking about a DSLR, but I think I'll always have a point n' click on the bike, I seem to kill one every year!!!

    /hijack off/
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