This will only fit the old "cage" style groups, with the removable boiler nuts and studs.
Steam flange gasket
± 4.25" Wide x 3.73" Long
2.25" x 2.09" ISD ,
8ea 0.31" Bolt holes.
522B 3/32" Thick
For steam to 399° C (750° F), compressed sheet, aramid fiber with nitrile binder.
Made in the USA.
It has been recommended to use Loctite #68035 with this gasket.
This will not work with the welded stud boilers. For that version use MZ_255.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.