PTO locking pins from Koch Industries are yellow zinc-plated. They are available in either round or square wire retainers.
| Id | 300884 | 
| SKU | 7480031 | 
| PartNo | 4021521 | 
| Type | Square Wire Retainer | 
| Size | 1/4 In | 
| Length | 2-1/2 In | 
| Finish | Zinc-Plated | 
| Color | Yellow | 
| CID | 9 |