this gasket fits standard 2-bolt flange patterns used in various commercial hydronic circulators matching the ARM1013 specification

the 100208087 is technically identical to the GKT2012 and GKT2012K part numbers

reducing the need for truck stock variations on service calls

When you're servicing commercial burners or fireplace units

Nordyne 661044R Burner Orifice this gasket fits standard 2-boltThe Nordyne 661044R is a critical OEM replacement part engineered for precise manifold gas delivery. This . 044 diameter burner orifice (standard #44 orifice size) serves as the direct replacement for 661044, ensuring an exact match for the BTU output and combustion profile of your furnace gas manifold. For veteran technicians managing Nordyne furnace repair, installing this genuine component is vital to maintain the correct air to fuel ratio and