1980 Dodge B-Series Van Spare Tire Carriers

The tire rack fits the full width back door on my 1994 Dodge 15 passenger Van just fine. However the carriage bolts and nuts are not lockable. Available locking lugs will not thread onto the provided carriage bolts, close, but no fit. The rack should have come with lug compatible bolts. The rack could also have been set up with holes suitable for wheel studs so these could be pressed in. The rack is on my truck but the tire is not. I have to get wheel studs welded in so I can mount and lock the tire.