The 4200 series spherical metal grommet firewall fitting has a 1 inch steel ball held in place by 1 4130 steel pressure plate. It requires only one hole in the firewall and has a swivel angle up to 50 degrees from straight. It is held onto the firewall with one 1 5/16 steel nut. This fitting is for a steel/stainless steel firewall. Assembly weighs only 1.8oz-2.5oz (.11lb-2.5lb) depending on ball hole size.
Meets FAR 23.1191 and AC 20-135 requirements.
0.125, 0.188, 0.240, 0.250, 0.260, 0.312, 0.330, 0.375, 0.438, 0.500, 0.750
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