The Zeron 100 bolts hub brings together every bolt-form variant of UNS S32760 super duplex stainless steel, hex-headed, internal-drive, countersunk, and specialty patterns, for service envelopes where standard stainless or alloy steel bolting won't survive (seawater immersion, sour service, chloride pitting, FGD, geothermal). Pick the bolt pattern by joint geometry; pick the supply state (SA / FG / FLT / AFP) by yield envelope and service temperature; we ship from the same heat tree as the matching stud bolts, heavy hex nuts, and washers so the joint is one alloy, one MTC family, no galvanic mismatch.
Hex bolts · Heavy hex bolts · Hex cap screws · SHCS · CSK · Set screws · Push bolts · PREN ≥ 40
| Pattern | Standard | Use case |
|---|---|---|
| Hex bolts | ASME B18.2.1 | Standard hex-head bolts for general fastening, sizes 1/4-4 in & M6-M100 |
| Heavy hex bolts | ASME B18.2.6 | Wider-AF + thicker-head pattern for high-clamp-load + structural connections |
| Hex cap screws | ASME B18.2.1 (precision class) | Tapped-hole connections with precision bearing-face fit |
| Socket head cap screws (SHCS) | ASME B18.3 / ISO 4762 | Internal hex drive for counterbored installs (tight clearance) |
| Countersunk screws (CSK) | ASME B18.6.3 | Flush-mount fasteners in machined countersinks |
| Set screws / grub screws | DIN 913 / 914 / 915 / 916 | Holding rotating elements on shafts; cup / cone / dog / oval point |
| U-bolts | per buyer drawing | Pipe clamps + tank anchors + custom U-shaped bolting |
| 12-point flange screws | NAS / aerospace specs | High-torque internal-drive flange head; aerospace + downhole high-pressure |
| Push bolts / push rods | per buyer drawing | Custom super duplex bolting for special tooling and rigging |
ASTM A1082 (material spec) + ASTM A479 / A276 (source bar) + ASME B1.1 (inch thread tolerance) / ISO 965 (metric) + ASME B18.x (pattern dimensions per type) + NACE MR0175 / ISO 15156-3 (sour-service ≤ 28 HRC) + NORSOK M-650 + M-630 MDS 055 (North Sea super duplex) + API 6A PSL3 (wellhead) + EN 10269 (European pressure equipment).
Send the spec (pattern + size + length + supply state + standards / MDS to comply with + coating + quantity + destination port) to info@torqbolt.com or +91-22-66157017 / WhatsApp.
