Hobson did you know flyer
Galvanised Class 4.6 Hex Coach Screw BH46GLM: Sizes and Pre-drilling (Did You Know)
Hobson's one-page "Did You Know" flyer for its hot dip galvanised class 4.6 hex coach screw (part BH46GLM), announcing more sizes. It lists each size's length, thread length, head height and across flats, plus the pre-drilling rule and uses.
What this covers
- Sizes and dimensions
- New sizes
- Pre-drilling
- Applications
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- Hex coach screw, hot dip galvanised, class 4.6, to AS 1393. Gimlet point for better centring in drilled holes.
- Sizes M6 to M20, 25 to 300mm long. Examples: M6 25 to 75mm (10mm across flats), M10 40 to 150mm (16mm AF), M12 40 to 300mm (18mm AF), M20 100 to 200mm (30mm AF).
- New M12 lengths: 250mm (150mm thread, BH46GLM120250) and 300mm (180mm thread, BH46GLM120300).
- Pre-drill to stop the timber splitting: a hole half the screw diameter in softwood, three quarters of the diameter in hardwood.
- Uses: fencing and posts, agriculture, timber fixing, general building, and into nylon wall plugs in concrete or masonry.
Who it helps: Builders and fencers fixing timber, and staff checking lengths and head sizes.
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This document is published by Hobson Engineering, who supply this range to us. We show it here in full so you can read it next to the product; the summary above is ours. Read it on this page or download the PDF. For the most current version, ask us.