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The Smith-Blair Style 411 steel coupling with 316 stainless steel bolts and nuts joins plain-end cast and ductile iron pipe from 2 in to 48 in without threading, welding, or special pipe-end preparation. The SS316 bolting configuration carries factory catalog suffix -043 and is otherwise identical to the standard coupling: fabricated steel middle ring, ductile iron followers, and Grade 27 SBR gaskets. Type 316 hardware adds molybdenum for superior resistance to chlorides, making it the standard choice for wastewater, brackish and coastal service, and aggressive soils.
Select the nominal size, pipe OD, and sleeve configuration below. Engineering-led sizing support is available for transition and gap-spanning applications; a factory submittal is provided with every order on request.
| Style | 411, SS316 bolts and nuts (suffix -043) |
| Service | cast and ductile iron pipe, 2 in to 48 in |
| Middle ring | Fabricated steel, fusion epoxy coated |
| Bolting | 316 Stainless Steel track-head bolts and heavy hex nuts |
| Gaskets | Grade 27 SBR, NSF-61 compounds available |
Need a submittal, a different bolt configuration, or help selecting the correct OD range? Email sales@watermainsupply.com or call 281.664.8000.
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