H.E.A.T., Inc. - Catalog Section 12 - Connection Heads, Blocks, Nipples, and Springs

Hinged Heads and Blocks
Hinged Heads - Flip Top
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• Nema 4 Rated
• Flip-Top Design for Easy Access and Closure
• Hinge Pins and Latches of Stainless Steel
• Silicone Gasket, Temperature Rated to 6000 F.
• Provisions for Security Tags
• Accepts H741, H742 & H743 Series Blocks
• Accepts H684 Series Blocks
(H684-6 in polypropylene heads only)
• Polypropylene Continuous Rating: 1980 F.
• Conduit Port Size: 3/4" NPT
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Plastic Terminal Blocks
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• Will Fit H701 - H709 Heads
• Will Fit H680, 682 & H683 Series Heads
• Stepped Center Hole for Spring Loading
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Aluminum Screw Cover Thermocouple Heads & Blocks
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• Meets NEMA 4 requirements for indoor/outdoor nonhazardous
use
• 825F Graphite Gasket
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Cast Iron Screw Cover Thermocouple Heads & Blocks
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• Meets NEMA 4 requirements for indoor/outdoor nonhazardous
use
• 825F Graphite Gasket
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Stainless Steel Screw Cover Thermocouple Heads & Blocks
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• Meets NEMA 4X. FDA requirements for indoor/
outdoor non-hazardous use
• 825F Graphite Gasket
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Terminal Blocks
11/16" Thick Single Block Brass Terminals
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PART NUMBERS

H741
H695 Single Block, Brass Terminals
1-5/32" Thick DuplexBlock Brass Terminals
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PART NUMBER

H742
7/8" Thick Triplex Block
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Nylon Heads & Hinged Aluminum Heads and Blocks
(Din Standard)
Nylon Head – 1/2" x 1/2" NPT
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Note:
UL Rated
PART NUMBER

H770
Aluminum Hinged Head
1/2" x 1/2" NPT
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PART NUMBER

H771
Terminal Blocks
Ceramic Standard Terminal Blocks
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No Base Plate
PART NUMBERS

H772-2 2 Terminal
H772-3 3 Terminal
H772-4 4 Terminal
Ceramic Terminal Blocks w/ Solder Hooks
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No Base Plate (Loose Base Plate Available - Inquire)
PART NUMBERS

H773-2-N 2 Terminal
H773-4-N 4 Terminal
H773-6-N 6 Terminal
Spring Mount Terminal Blocks w/ Solder Hooks
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Steel Base Plate
Spring Mount
PART NUMBERS

H774-2 2 Terminal
H774-4 4 Terminal
H774-6 6 Terminal
Heads and Covers
Miniature Nickel-Plated Steel Heads
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• 2, 3, or 4 Terminal
• “O” Ring Moisture Seal (Remove for Free Fit if Desired)
• Neoprene Cap Grommet Standard
• 1/4" NPT Process Opening – Standard
• 1/8" NPT Process Opening – Optional (add-1 to P/N)
• 5/16" Compression Fitting in Cover – Optional (Add "- C" to Part Number)
PART NUMBERS

H791 2 Terminal 1/4" NPT Miniature Head
H791-1 2 Terminal 1/8" NPT Miniature Head
H792 3 Terminal 1/4" NPT Miniature Head
H792-1 3 Terminal 1/8" NPT Miniature Head
H793 4 Terminal 1/4" NPT Miniature Head
H793-1 4 Terminal 1/8" NPT Miniature Head
Micro Heads
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PART NUMBERS

H785-U-2 Single Circuit 1/8" Sheath
H785-U-4 Single Circuit 1/4" Sheath
Miniature Die Cast Aluminum Screw Cover
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• Miniature Head
• Burnished Die Cast Aluminum
• 2 Terminal Block, or 4 Terminal Block
• 1/2 NPT Process, 1/2 NPT Conduit
• Includes Compression Fitting Adaptor
• Includes Rubber Ferrule
PART NUMBERS

H775-1 Head w/ 2 Terminal Block
H775-2 Head w/ 4 Terminal Block
H776-1 2 Terminal Block only
H776-2 4 Terminal Block only
Thermoplastic Screw Cover Heads
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The H781-3 and H781-6 heads are molded from white unpigmented polypropylene. Both heads meet NEMA 4X requirements for indoor or outdoor non-hazardous use to provide protection against dust, rain, splashing water and hose directed water. Although these thermoplastics are attacked by strong acids, they provide good resistance to most acid solutions, alkalines and salt water. They provide good weathering resistance to sunlight. The white polypropylene head is FDA compliant for use in sanitary applications. These heads, and the Bunan O-Ring, have a continuous use temperature rating of 2500 F. The cover is chained to the body with stainless steel chain and pins. All heads have 1/2" NPT process openings and 3/4" NPT conduit openings.
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Miniature Plastic Heads
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Use HBPC series Braze Plugs, HCB Series Brass Compression Fittings, or HCS Series Stainless Compression Fitting for connection to TC Probe.
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Nipples and Springs
Spring-Loaded Nipples: 316 Stainless Steel - 1/2 x 1/2 NPT
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NOTE:

Inconel or 17-7PH Spring (Included)
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Weld/Braze Nipples
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Sheath Springs
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NOTE:

• Stainless Steel or 17-7 PH
• .440 OD springs fit H743 series blocks
• Other spring loading applications
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7602 Dayton Road
PO Box 295
Enon, Ohio 45323
United States

Phone: (937) 864-1766
FAX: (937) 864-5927

Monday - Friday
8:00 AM - 5:00 PM
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