A194 2H is the nut for every B7 stud and bolt we manufacture and supply, so we hold it in depth in Umm Al Quwain from ¼" to 4" and M12 to M100, in plain, hot-dip galvanized, zinc plated and PTFE / Xylan finishes, with 2HM available for sour service.
ASTM A194 Grade 2H is a heavy hex nut of quenched-and-tempered medium-carbon steel with a minimum proof load of 175 ksi, sized to ASME B18.2.2 with a larger across-flats and thickness than a standard nut. It is the standard nut for high-pressure and high-temperature flange bolting with A193 B7, B16 and A320 L7 studs, and for A325 / A490 structural bolts where DH nuts are not specified. Grade 2HM is the controlled-hardness version for NACE MR0175 sour service.
Applications
- ASME B16.5 / B16.47 flange joints with B7 studs
- Pressure vessels, exchangers and boilers
- Valve bonnets and pump casings
- Structural bolting with A325 / A490
- Refinery, gas plant and pipeline connections
- Anchor bolts in equipment foundations
Standards, grades & finishes
Nuts to ASTM A194 / A194M Grade 2H (2HM on request), dimensions to ASME B18.2.2 heavy hex, threads UNC / 8UN Class 2B to ASME B1.1 or metric 6H to ISO 965; galvanized nuts tapped oversize to ASTM A563 / F2329 with dry lubricant. Finishes plain, hot-dip galvanized, zinc plated, PTFE / Xylan. Hardness and proof load certified per heat.
This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.