Heil 1170947 Pressure Switch. (1010895)
1.38" W.C., 2 Port, 2 Wire Switch. For
the following Heil brand gas furnaces:
NUG9125FKA1 and NUGM100EHB1. 
Replaces parts HQ1008819TA, 1008819,
1170847, 1010895, HQ1010895TR,
Tridelta FS6285-1640 & PPS10009-2174
TRIDELTA IND. INC.  Honeywell part
#IS20366-5714.
Also Fits...

Heil 1172197 Pressure Switch.
.18" W.C., 1 Port, 2 Wire Switch.
Replaces HK06WC061.
Honeywell part #IS20224-5236.
Fits Models...

Heil 1445589 Pressure Switch.
2 Port, 3 Wire Switch. Replaces
FS6318-513.
Fits Models...

Heil 1005251 Pressure Switch,
4.2" W.C., 1 port, 2 wire switch.
Replaces FS6015-684 as well as
HQ1005251TR.
Fits Models...

Heil 1006405 Pressure Switch.
2 Ports, 2 Wire Switch. Replaces
FS6578-1041 and HQ1006405TR.
Fits Models...

Heil 1170927 Pressure Switch.
.50" W.C., 1 Port, 2 Wire Switch.
Honeywell part #IS20124-5609.
Fits Models...

Heil 609537 Pressure Switch.
2 Ports, 2 Wire Switch. For use with
many Heil brand gas furnaces which
includes NUGE105KG01. Replaces
number FS5070-52 along with the
Tri-Delta Ind. #FS5070-52.
Fits Models...

Heil 1010897 Pressure switch.
.40" W.C., 1 Port, 2 Wires. Replaces
part numbers 1010897, 1093433,
1445595, 1445598, 1013529 and
1174276.
Fits Models...

Heil 1170926 Pressure Switch.
.66" W.C.  For many Heil
brand model gas furnaces.
Honeywell part #IS20124-5608.
Fits Models...

Heil 1005252 Pressure Switch. 
1 Port, 2 Wire.  For Heil brand
furnaces.  Replaces FS6015-685
and HQ1005252TR.  ICP brand
model #NUGK075DG07.
Also Fits...

Heil 1005577 Pressure Switch.  FS6441
(HQ1005577TR).  1 Port, 2 wire switch.
Directly replaces the following:
CAR1005577, HQ1005577TR, 1005677,
FS6441-719, PRS1005577, also 011617,
0648671005577 and 99756145.
Fits Models...

Heil 1005254 Pressure Switch.
1 Port, 2 Wires.  Replaces FS6015-687,
and HQ1005254TR.
Fits Models...

Heil 1005603 Pressure Switch.
Fits Models...