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Crag & Route Beta

Area	Location	Sub Location	Crag	Links
VIC Melbourne	(General)	(General)	(General)	[ Melbourne Guide ]

Topic Date User

Loose nut on Camel's Hump rap/belay station 17-Feb-2009 At 1:20:30 PM adrian

Message

On 17/02/2009 nmonteith wrote:
>On 17/02/2009 adrian wrote:
>>Actually, is there a reason that no-one uses self-locking nuts when they
>>install either expansion bolts or threaded studs like this?
>
>So we can replace hangers and the bolts in the future and also re tighten
>up expansions that have slipped in the hole due to rock compressing over
>time (different from just nut coming loose).

Ok, but self-locking nuts can be removed or tightened after installation, they just don't work loose over time (or are less likely to than normal nuts at the least). The metal spring washers that wallwombat mentioned can also be used, but are more likely to have problems if the bolt isn't exactly perpendicular to the hanger/rock surface.