Author Topic: Best kind and source for M20 bolts  (Read 993 times)

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Offline ear3

  • Posts: 3351
Best kind and source for M20 bolts
« on: July 11, 2015, 07:43 AM »
Wanted to pick up a few M20 bolts as extra stops/dogs/jig fixtures to supplement my QWAS ones now that I'm finishing up my MFT style workbench top.  Was wondering what the best style of M20 fastener was for this purpose (i.e., hex head, round head), and what's a good source in the US for getting metric bolts this big?  Thanks.
Kapex KS 120 w/UG Cart and Extensions • CXS Set • T18+3 w/Centrotec Installer's Set • PDC 18/4 • TS 75 • TSC 55 • HKC 55 w/250, 420 and 670 FSK rails • Carvex 420 w/Accessory Kit • Domino 500 Set • Domino 700 XL • OF 2200 w/Base Accessory Kit • OF 1400 • OF 1010 • MFK 700 EQ Set • LR 32 • MFS 400 w/2000, 1000, and 700 extensions • Rotex 90 • Rotex 150 • LS 130 • ETS-EC 150/5 • ETS 150/3 • Pro 5 LTD • RTS 400 • RAS 115.04 • DX 93 • RS 2 • HL 850 • Vecturo OS 400 • CT 26 w/Long-Life Bag • CT Sys w/Long-Life Bag • MFT/3

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Offline neilc

  • Posts: 2161
Re: Best kind and source for M20 bolts
« Reply #1 on: July 11, 2015, 08:04 AM »
Hex head will be the cheapest in a 20mm size

Try McMaster.com

Amazon also stocks them in packs of 10

I don't think Lowes stocks any metric that large.


Offline ear3

  • Posts: 3351
Re: Best kind and source for M20 bolts
« Reply #2 on: July 11, 2015, 11:02 AM »
Thanks.

Hex head will be the cheapest in a 20mm size

Try McMaster.com

Amazon also stocks them in packs of 10

I don't think Lowes stocks any metric that large.
Kapex KS 120 w/UG Cart and Extensions • CXS Set • T18+3 w/Centrotec Installer's Set • PDC 18/4 • TS 75 • TSC 55 • HKC 55 w/250, 420 and 670 FSK rails • Carvex 420 w/Accessory Kit • Domino 500 Set • Domino 700 XL • OF 2200 w/Base Accessory Kit • OF 1400 • OF 1010 • MFK 700 EQ Set • LR 32 • MFS 400 w/2000, 1000, and 700 extensions • Rotex 90 • Rotex 150 • LS 130 • ETS-EC 150/5 • ETS 150/3 • Pro 5 LTD • RTS 400 • RAS 115.04 • DX 93 • RS 2 • HL 850 • Vecturo OS 400 • CT 26 w/Long-Life Bag • CT Sys w/Long-Life Bag • MFT/3

Offline Bohdan

  • Posts: 791
Re: Best kind and source for M20 bolts
« Reply #3 on: July 11, 2015, 12:44 PM »
The cheap hex head bolts do not necessarily have the head concentric with the shaft. They might be, it depends on the production quality control so I would be careful if you are going to use them for any critical work. I would expect that the high tensile bolts (probably not made in the East) are a better quality but they are also a lot more expensive.

Offline leakyroof

  • Posts: 1958
Re: Best kind and source for M20 bolts
« Reply #4 on: July 19, 2015, 05:16 PM »
Another point is fit of the bolt to your 20mm holes. Qwas and Lee Valley go to a good deal of trouble to get a tight enough fit on their dogs, but not so much that they're hard to insert or pull out. Depending on your bolt class/specs, you could have a fair amount of wobble or play with the bolts diameter to your 20mm hole clearance.
Not as many Sanders as PA Floor guy.....