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| Cap bolt question |
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| AdeV:
What size hole do I need to drill to clear the head of an M10 cap head bolt? I'm drilling into the under section of my sump, and I want to countersink the bolts nice & deep, so they don't get in the way of anything, and to reduce the temptation to remove them... (I may plug the holes once the bolts are in) Thing is, I don't have any M10 cap-head bolts yet... & can't get any until Monday, so I can't measure myself... Thanks in advance! :nrocks: |
| rleete:
Solidworks uses a 10.0mm diameter hole, by 18.0mm deep as standard clearance for a 10mm S.H.C.S. |
| John Rudd:
AdeV, I measure with my trusty calipers, the head is 16.12 mm dia by 9.90mm high.. HTH |
| Jasonb:
Best to measure your screws as they do vary from the proper BS spec as you can see by comparing your sizes with the following. http://www.roymech.co.uk/Useful_Tables/Screws/cap_screws.htm J |
| andyf:
There's a table here, Ade, which indicates that a 16mm dia x 10mm deep counterbore should be OK for M10. If the bolt heads are a mite too big when you get them, you could always turn them down to fit. Andy |
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