xxx Classic Joshua Treex
xxx San Luis Obispoxxxxxxx....x
xxx SoCal Sport
xxx Tram Boulderingx...............
$32.00 xxxxx xxxxxxxxxxxxxxxxx
BUTTON HEAD BOLT #R3211
BUTTON HEAD BOLT is a compression type bolt
that is essentially "forced" into
the hole thereby exerting pressure along
it's offset "wings" - which create
the holding power. It is appropriate for
high quality, hard rock - like granite -
when drilling time and bits are at a premium.
The strength of this type and size bolt
is similar to an optimally placed piece
of trad gear - use consciously on back country,
alpine and expedition first ascents. Care
is needed to maintain the diameter of the
hole while drilling an oversized 5/16"
hole - as well as carefully starting to
pound in the bolt to avoid fracturing or
"spawling" the rock.
|strength: 15 kN
/ 3375 lbf
|wt: 0.7 oz
|size: 1/4 x 1.25"