Public Lab Research note


lead in brass snap swivels

by mathew | January 31, 2012 02:27 | 237 views | 0 comments | #733 | 237 views | 0 comments | #733 31 Jan 02:27

Read more: publiclab.org/n/733


Our balloon kit is nearly together but one thing has been vexing me-- trying to find a lead-free snap swivel. I like coast lock snap swivels, like the ones sold at kitebuilder.com where I got my first coast lock snap swivel. I tracked back this swivel to the Sampo company, manufacturer of Rosco swivels. Through talking to wholesale suppliers I was referred to call Sampo, where I had a great conversation with Brian Butts, the owner. Brian explained that his swivels, while some use brass bearings and some stainless ball bearings, all contain 360 brass, which is 3% lead. This is pretty much same amount of lead found in many keys, and is RoHS compliant (<4%). Brian tests himself for lead and has never had elevated levels. And for machining reasons there are very good reasons to include a little lead..

Thanks to a suggestion by Liz Barry, I found some all-stainless hardware, the American Fishing Wire Mighty Mini Snap Swivels.. And they're cheaper, stronger, and because steel is more fatigue resistant, very likely more durable. Attached is the MSDS I got from Stephanie Farnum at AFW.

Files Size Uploaded
SSA MSDS.pdf 1.27 MB 2012-01-31 02:22:47 +0000

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