Arklay S. Richards

Thermocouple connection heads are available in a variety of materials and configurations. Our more common styles are shown below. If you are looking for a particular type, which is not shown here, please phone one of our sales engineers since we carry other heads in stock. All thermocouple connection heads are sold with connector blocks. If you would like to order them without blocks, add a -WOC to the end of the part number. NEMA ratings are also shown for each head.

Click Here for Connector blocks page.

Part Number Key

For heads without connector blocks, add -WOC to the end of the catalog number.
Example: AWH12-WOC
The "S" in the catalog number designates single element
The "D" in the catalog number designates double elements
The "T" in the catalog number designates triple elements
For white epoxy coating, add "E" to the front of the part number
Example: EAWHS08

Standard Die Cast Aluminum Heads-Screw Cap & Chain (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
SHS16	Single	1" NPT	3/4" NPT	Height 3 1/2" Width 3 1/4" Cap Diameter 3 1/4"
SHS12	Single	3/4" NPT	3/4" NPT
SHS08	Single	1/2" NPT	3/4" NPT
SHS02	Single	1/8" NPT	3/4" NPT
SHD16	Double	1" NPT	3/4" NPT
SHD12	Double	3/4" NPT	3/4" NPT
SHD08	Double	1/2" NPT	3/4" NPT
SHD02	Double	1/8" NPT	3/4" NPT
SHT16	Triple	1" NPT	3/4" NPT
SHT12	Triple	3/4" NPT	3/4" NPT
SHT08	Triple	1/2" NPT	3/4" NPT
SHT02	Triple	1/8" NPT	3/4" NPT

316L Stainless Steel Heads-Screw Cap & Chain (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
SSHS12	Single	3/4" NPT	3/4" NPT	Height 3 1/2" Width 3/1/4" Cap Diameter 3 1/16" (77.8mm)
SSHS08	Single	1/2" NPT	3/4" NPT
SSHD12	Double	3/4" NPT	3/4" NPT
SSHD08	Double	1/2" NPT	3/4" NPT
SSHT12	Triple	3/4" NPT	3/4" NPT
SSHT08	Triple	1/2" NPT	3/4" NPT

Die Cast Aluminum Heads-Screw Cap & Chain (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
AWHS16	Single	1" NPT	3/4" NPT	Height 3 3/16 in. (81.0mm) Width 2 15/16" (74.6mm) Cap Diameter 3 1/16" (77.8mm)
AWHS12	Single	3/4" NPT	3/4" NPT
AWHS08	Single	1/2" NPT	3/4" NPT
AWHS02	Single	1/8" NPT	3/4" NPT
AWHD16	Double	1" NPT	3/4" NPT
AWHD12	Double	3/4" NPT	3/4" NPT
AWHD08	Double	1/2" NPT	3/4" NPT
AWHD02	Double	1/8" NPT	3/4" NPT
AWHT16	Triple	1" NPT	3/4" NPT
AWHT12	Triple	3/4" NPT	3/4" NPT
AWHT08	Triple	1/2" NPT	3/4" NPT
AWHT02	Triple	1/8" NPT	3/4" NPT
AWHTR16	Triple	1" NPT	3/4" NPT
AWHTR12	Triple	3/4" NPT	3/4" NPT
AWHTR08	Triple	1/2" NPT	3/4" NPT
AWHTR02	Triple	1/8" NPT	3/4" NPT

Aluminum General Purpose Heads-Cap attached & screws (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
AHS12	Single	3/4" NPT	1/2" NPT	Height 2 3/4 in. (69.9 mm) Width 2 15/16" (74.6mm) Cap Diameter 3 1/16" (77.8mm)
AHS08	Single	1/2" NPT	1/2" NPT
AHS02	Single	1/8" NPT	1/2" NPT
AHD12	Double	3/4" NPT	1/2" NPT
AHD08	Double	1/2" NPT	1/2" NPT
AHD02	Double	1/8" NPT	1/2" NPT

Die Cast Aluminum Heads-Screw Cap & Chain (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
ACHS08	Single	1/2" NPT	3/4" NPT	Height 3 1/16 in. (81.0 mm) Width 2 15/16" (74.6mm) Cap Diameter 3 1/16" (77.8mm)
ACHD08	Double	1/2" NPT	3/4" NPT
ACHT08	Triple	1/2" NPT	3/4" NPT

Aluminum Flip Top Heads-(Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
AFTHS16	Single	1" NPT	3/4" NPT	Height 3 1/2" Width 3 1/4" Cap Diameter 3 1/16" (77.8mm)
AFTHS12	Single	3/4" NPT	3/4" NPT
AFTHS08	Single	1/2" NPT	3/4" NPT
AFTHS02	Single	1/8" NPT	3/4" NPT
AFTHD16	Double	1" NPT	3/4" NPT
AFTHD12	Double	3/4" NPT	3/4" NPT
AFTHD08	Double	1/2" NPT	3/4" NPT
AFTHD02	Double	1/8" NPT	3/4" NPT
AFTHT16	Triple	1" NPT	3/4" NPT
AFTHT12	Triple	3/4" NPT	3/4" NPT
AFHT08	Triple	1/2" NPT	3/4" NPT
AFHT02	Triple	1/8" NPT	3/4" NPT

Aluminum Miniature Heads-Screw cover & Chain (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
AMHS08	Single	1/2" NPT	3/4" NPT	Height 2 3/4 in. (69.9 mm) Width 2 15/16" (74.6mm) Cap Diameter 3 1/16" (77.8mm)
AMHD08	Double	1/2" NPT	3/4" NPT

Small Aluminum Weatherproof Heads-Twist cover (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
WHS08	Single	1/2" NPT	1/2" NPT	Height 3.0 in. (76.2 mm) OD 2.8" (71.1mm) Weight
WHD08	Double	1/2" NPT	1/2" NPT	Height 3.0 in. (76.2 mm) OD 2.8" (71.1mm) Weight

Large Aluminum Weatherproof Heads-Twist cover (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
WHS12	Single	3/4" NPT	1/2" NPT	Height 3.63 in. (92.2 mm) OD 3.88" (98.5 mm) Weight 15.75
WHD12	Double	3/4" NPT	1/2" NPT	Height 3.63 in. (92.2 mm) OD 3.88" (98.5 mm) Weight 15.75

Screw Cover Heads-Twist cover (2158 connector included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
H16	Single	1" NPT	Not Used	Height 2.5 in. (63.5 mm) OD 2.5" (63.5 mm) Weight 1.4 Lbs
H12	Single	3/4" NPT	Not Used
H08	Single	1/2" NPT	Not Used

Cast Iron Heads-Screw cap & chain, Painted (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
CIHS16	Single	1" NPT	3/4" NPT	Height 3 1/2" Width 3 1/4" Weight 1.85 Lbs
CIHS12	Single	3/4" NPT	3/4" NPT
CIHS08	Single	1/2" NPT	3/4" NPT
CIHD16	Double	1" NPT	3/4" NPT
CIHD12	Double	3/4" NPT	3/4" NPT
CIHD08	Double	1/2" NPT	3/4" NPT
CIHT16	Triple	1" NPT	3/4" NPT
CIHT12	Triple	3/4" NPT	3/4" NPT
CIHT08	Triple	1/2" NPT	3/4" NPT

Polypropylene (Black) Flip Top Heads- (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
BFTHS12	Single	3/4" NPT	3/4" NPT	Height 3 1/2" Width 3 1/4" Cap Diameter 3 1/16" (77.8mm)
BFTHS08	Single	1/2" NPT	3/4" NPT
BFTHS02	Single	1/8" NPT	3/4" NPT
BFTHD12	Double	3/4" NPT	3/4" NPT
BFTHD08	Double	1/2" NPT	3/4" NPT
BFTHD02	Double	1/8" NPT	3/4" NPT
BFTHT12	Triple	3/4" NPT	3/4" NPT
BFTHT08	Triple	1/2" NPT	3/4" NPT
BFTHT02	Triple	1/8" NPT	3/4" NPT

Polypropylene (FDA approved white) Flip Top Heads- (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
WFTHS12	Single	3/4" NPT	3/4" NPT	Height 3 3/16 in. (81.0mm) Width 2 15/16" (74.6mm) Cap Diameter 3 1/16" (77.8mm)
WFTHS08	Single	1/2" NPT	3/4" NPT
WFTHS02	Single	1/8" NPT	3/4" NPT
WFTHD12	Double	3/4" NPT	3/4" NPT
WFTHD08	Double	1/2" NPT	3/4" NPT
WFTHD02	Double	1/8" NPT	3/4" NPT
WFTHT12	Triple	3/4" NPT	3/4" NPT
WFTHT08	Triple	1/2" NPT	3/4" NPT
WFTHT02	Triple	1/8" NPT	3/4" NPT

Iron Heads-Screw cap & chain (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
IHS08	Single	1/2" NPT	3/4" NPT	Height 3.75 in. (95.3 mm) OD 3.38" (95.3 mm)
IHS08	Double	1/2" NPT	3/4" NPT
IHT08	Triple	1/2" NPT	3/4" NPT

General Purpose Cast Iron Heads-Steel cover (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
GPH16	Single	1" NPT	1/2" NPT	Height 1.5 in. (38.1 mm) OD 1.38" (34.9 mm) Weight 3.0 oz
GPH12	Single	3/4" NPT	1/2" NPT
GPH08	Single	1/2" NPT	1/2" NPT

Nylon Heads- Screw Cover (Blocks included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
NHS	Single	1/2" NPT	1/2" NPT	Height 3.0 in. (76.2 mm) OD 2.8" (71.1 mm) Weight 3.9 oz
NHD	Double	1/2" NPT	1/2" NPT	Height 3.0 in. (76.2 mm) OD 2.8" (71.1 mm) Weight 3.9 oz

Miniature Steel Heads- (Blocks included)
Catalog Number	Terminals	Process Opening	Conduit Opening	Dimensions
MSH202	Two	1/8" NPT	Grommet or 5/16" Compression Fitting	Height 2 1/4 in. (57.2 mm) OD 1 1/8" (28.6 mm)
MSH204	Two	1/4" NPT
MSH302	Three	1/8" NPT
MSH304	Three	1/4" NPT
MSH402	Four	1/8" NPT
MSH404	Four	1/4" NPT

Explosion Resistant Head-Screw cover (Terminal Strip not included)
Catalog Number	Terminal Pairs	Process Opening	Conduit Opening	Dimensions
EXS1212	Single	3/4" NPT	3/4" NPT	Height 2 3/4 in. (69.9 mm) Width 2 15/16" (74.6mm) Cap Diameter 3 1/16" (77.8mm)
EXD1212	Double	3/4" NPT	3/4" NPT

If you do not see a particular head in our site please contact one of our sales staff. We
carry a variety of heads which are not shown here. Click Here for Connector blocks page.