Type HB – Hollo-Bolt® Button Head SecurityJuly 17, 2015/0 Comments/by sfschris The Hollo-Bolt is the first expansion bolt for structural steel that has a full seismic approval. https://structuralfixingsystems.co.za/wp-content/uploads/2015/09/SFS-Logo.png 0 0 sfschris https://structuralfixingsystems.co.za/wp-content/uploads/2015/09/SFS-Logo.png sfschris2015-07-17 23:07:362015-07-17 23:08:36Type HB – Hollo-Bolt® Button Head Security
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