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Colonial Engineering
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Flange Bolt Kit shown with mating flanges and Colonial 311N Butterfly Valve

For complete parts list and description of all Colonial parts (valves, insert fittings, and unions), download Parts List Excel file.

Flange Bolt Kits
Flange bolt kits sized to mate ANSI Class 150 flanges and Colonial 411 & 311 Series Butterfly Valves.

Offered in both Zinc Plated and Galvanized Steel.

Bolt kits do not include gaskets because Colonial 311N and 411N butterfly valves do not require gaskets.

Packed in corrugated cartons for ease of shipping/handling and organizing at the jobsite.

Valve Size 2" & 2-1/2" (4 Flange Holes)
4 - 5/8-11 x 5 Hex Bolt A307
4 - 5/8-11 Hex Nut
8 - 5/8 SAE Flat Washer
V20BFKZ Zinc Plated
V20BFKG Galvanized

Valve Size 8" (8 Flange Holes)
8 - 3/4-10 x 8 Thread Hex Bolt A307
8 - 3/4-10 Hex Nut
16 - 3/4 SAE Flat Washer
V80BFKZ Zinc Plated
V80BFKG Galvanized

Valve Size 3" (4 Flange Holes)
4 - 5/8-11 x 5-1/2 Hex Bolt A307
4 - 5/8-11 Hex Nut
8 - 5/8 SAE Flat Washer
V30BFKZ Zinc Plated
V30BFKG Galvanized

Valve Size 10" (12 Flange Holes)
12 - 7/8-9 x 9 Hex Bolt A307
12 - 7/8-9 Hex Nut
24 - 7/8 SAE Flat Washer
V100BFKZ Zinc Plated
V100BFKG Galvanized

Valve Size 4" (8 Flange Holes)
8 - 5/8-11 x 6 Hex Bolt A307
8 - 5/8-11 Hex Nut
16 - 5/8 SAE Flat Washer
V40BFKZ Zinc Plated
V40BFKG Galvanized

Valve Size 12" (12 Flange Holes)
12 - 7/8-9 x 10 Thread Hex Bolt A307
12 - 7/8-9 Hex Nut
24 - 7/8 SAE Flat Washer
V120BFKZ Zinc Plated
V120BFKG Galvanized

Valve Size 6" (8 Flange Holes)
8 - 3/4-10 x 7-1/2 Thread Hex Bolt A307
8 - 3/4-10 Hex Nut
16 -3/4 SAE Flat Washer
V60BFKZ Zinc Plated
V60BFKG Galvanized

See List Price Sheet for current pricing.