M4S-PF
MODULAR SOLUTIONS ZINC PLATED FASTENER-M4 SQUARE NUT W/POSITION FIX M4 WITH SPRING SQUARE NUTS M4 – 0.7 THREAD ZINC PLATED MATERIAL: STEEL TECHNICAL 13MM X 13MM X 6MM THICK INFO POSITION HOLDING NUT FOR THE 45 SERIES PROFILE CAN BE INSTALLED FROM THE TOP