Doug Shepard
04-23-2009, 12:04 PM
I decided I needed a handful of connector bolts and cross dowels for a project. No problem - they're all 1/4-20 and there are plenty of sources, sizes, and finishes. Then I notice that every other aspect of the fasteners except the connector threading is metric. The diameter of the bolt heads, allen socket size, cross dowel diameter, hole offset and length are all in metric. Here's a sample from LV's site but they're all this way as near as I can tell
http://www.leevalley.com/hardware/page.aspx?c=2&p=45375&cat=3,41306
Not a huge deal but it means I need to also pick up a couple of metric brad point drill bits. I need the bolt heads flush with the surface so I need to counterbore. LV doesn't carry a 17mm brad point or forstner that will fit th head so it's off to W.M Fuller. They hybridization is lost on me. seems like these would or should have a metric thread size too, or be comletely Imperial,. Anybody know if there's a logical reason behind this?
http://www.leevalley.com/hardware/page.aspx?c=2&p=45375&cat=3,41306
Not a huge deal but it means I need to also pick up a couple of metric brad point drill bits. I need the bolt heads flush with the surface so I need to counterbore. LV doesn't carry a 17mm brad point or forstner that will fit th head so it's off to W.M Fuller. They hybridization is lost on me. seems like these would or should have a metric thread size too, or be comletely Imperial,. Anybody know if there's a logical reason behind this?