Survey Nails
Available in five sizes 30mm, 50mm, 70mm, 80mm and 100mm the latter being type 1 permanent ground marker for dense very stable paved surfaces.
Large 20mm diameter head has a central monitoring recess which can be used to accurately receive a plumb-bob or prism pole.
The precise marks on the head allow easy alignment through an instrument's optical plumbing device.
Should additional washers be required then there are 30mm diameter & 50mm diameter available.
Item | SN030 | SN050 | SN070 | SN080 | SN100 |
Material | A3 Carbon Steel |
ØD head | 20mm |
Ød body | 8.8mm |
Length | 30mm | 50mm | 70mm | 80mm | 100mm |
Unit Weight | 18g | 26g | 36g | 40g | 50g |
Surface treatment | White zinc or Color zinc plated |
Note | Special size and requirement can be accepted |