| FLAT HEAD presents the largest bearing area against the parent material and is the most commonly used. The head can be used as a spacer to separate the assembled parts, or the space eliminated by boring to allow the head to sit below the surface. |
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| LOW PROFILE, also referred to
as REDUCED HEAD or THIN SHEET. This headstyle replaces the need to
countersink the parent material and reduces the gap between the
materials. If no gap is required, a shallow countersink could be made.
It is not recommended to use this type if the joint is under extreme tension or the parent material is
soft, which could cause the small head to pull through.
Avdel 'thin sheet' 9658 series require a special tool assembly to install correctly. |
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From
the outside, the difference between the low profile head on the left is
clearly illustrated against a standard flat head shown on the right