Question about Yakima bike mounts : rcycling

Question about Yakima bike mounts : rcycling yakima t slot bolts At rack attack in Portland they sold me the Yakima slide-in flat nuts for one dollar apiece They are 6 mm I couldn't find an inexpensive yakima tslot accessories T bolt and spacer that the Ski rack mount on to I am going to pick one up today I found a forum where a user said he had to grind the bolts

yakima tslot accessories Tslot bolts from the back of the track I I also suspect having an open T slot on the cab may cause a high pitched whistling noise

yakima t slot rack T-bolts that will slide into the T-slot on our bars, the nut goes on top to wedge that in Shop T Slot Bolts for Thule, Yakima Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure BikeSkiKayak Rack,