Tom- Not the direct answer to your question but machine screw protective covers are a good replacement. My local DYI had them in the nuts and bolts asile for poctet change. I think I used the bolt #8 size, they are red.
Andy Stewart Raleigh, NC
Message: 9 Date: Fri, 8 May 2009 12:00:05 -0400 From: Tom Sanders <email@example.com> Subject: [CR] WTB Blue Rubber tips Or Nipples For Campagnolo Pump Heads To: <Classicrendezvous@bikelist.org> Message-ID: <001c01c9cff6$0f001d60$2d005820$@net> Content-Type: text/plain; charset="us-ascii"
Continuing to work this estate I'm into, I just got a bunch of Campagnolo pump heads for Silca pumps, but the blue rubber tips on them are deteriorated. Wasn't someone selling them new a while back? Any help appreciated.
Lansing, MI USA