Discourage those pesky (and “noisy”) electrical gremlins and ground-loops by using our Ground Blocks as a centralized grounding system. These are hand-made from .04” flat brass stock, sheared to size, with 24 or 48 Fast-On tabs securely soldered into place. Ships complete with installation hardware—brass bolt, nuts, internal-tooth lock washers, and spacer washers to accommodate any thickness of firewall. Most projects will require a single 24-point Ground Block on the cockpit side of the firewall; “loaded” electrical systems may require the 48-point block. A full “firewall ground kit” is also available in two sizes for composite aircraft needing ground points on both sides of the firewall.
Choosing A Ground System:
Most projects can do the job with a single, 24-point ground block on the cockpit side of the firewall. Many electrical accessories forward of the firewall get an electrical ground by virtue their mounting on a metallic firewall - OR - grounded through a mounting on the engine. Only projects with a very busy electrical system will need 48 grounds behind the panel.
Airplanes with composite firewalls need some ground points on the forward side. The full-up firewall ground kit includes a long brass bolt with sufficient brass washers to shim between the two ground blocks on a thick, composite firewall. Single ground blocks are shipped with a shorter brass carry-through bolt, washers, and nuts for sheet metal firewalls.
Well made. Lightweight and compact.
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
Per the supplier: .25"
The bolt is 5/16".
1-3/8" x 3-1/2"