Will this work in both gas and electric Nordyne furnaces

distinguishing it from other colors like white (3/4") or red (1-1/2")

This is a standard run capacitor

While universal timers exist

this 1/4 inch regulator orifice must be torqued to 50-60 ft-lbs using a thin-wall hex socket to maintain a gas-tight seal and prevent seat damage

Carrier 307566-751 Fusible Link Will this work in bothThe Carrier 307566 751 Fusible Link is a critical safety component designed for thermal protection in Carrier, Bryant, and Payne gas furnaces. This low voltage safety device acts as a one time thermal cutoff, interrupting the electrical circuit if internal cabinet temperatures exceed the specific fusible link temperature rating. Veteran technicians recognize this as a vital safeguard against heat exchanger rollout or blower motor failure. When