Abstract: A safety chain assembly 24 for securing a towed agricultural vehicle (not shown) to a towing vehicle 21. The safety chain assembly 24 includes a clevis hook 54 having two pin receiving openings 55; a latch member 60 having an attachment opening 62; a spring pin assembly 56, and an elongated load bearing device 36 having a securing opening 37. In the preferred embodiment shown in the drawings the elongated load bearing device 36 is a chain, but it will be appreciated that it could also be a wire rope or other load bearing device having a securing opening 37. Similarly, the preferred spring pin assembly 56 includes a biasing mechanism such as a spring 64 and a washer 66; a retention member 70 and a pin 72; the pin 72 having an annular groove 84, a head 85 and first and second ends 87, 89; the annular groove 84 being located proximate the first end 87 and the head 85 being located proximate the second end 89.