Nuts and Bolts, U Bolts, and Couplers all play a valuable part in trailer safety with regard to the running parts of a trailer.
They get torqued to a specific setting determined by the size and material that it is manufactured from.
Cost: R200
Replacement / Prices are relative to the cost of parts and availability thereof. Also, the make and quality the client chooses to replace it with will play a part in the pricing
The spring replacement labour is R200 per square and this is dependent on the spring size, and make.