At Ananka Fasteners Pvt Ltd, we engineer, manufacture, and supply premium Duplex 2101 LDX (UNS S32101) Heavy Hex Bolt built for demanding service. Lean, low-nickel duplex using manganese and nitrogen for strength; used in structural, rebar and tank applications. This technical datasheet covers the precise dimensional tolerances per ASME B18.2.1 and the material requirements dictated by ASTM A1082 UNS S32101 and ASTM A276 / A479.
A Duplex 2101 LDX Heavy Hex Bolt provides a larger bearing surface and wrenching area than a standard hex bolt, making it well suited to high-load piping, structural and pressure-boundary joints. The tables below provide the principal dimensions, equivalent material grades, chemical composition and mechanical properties covered by the technical data for this product.
Our heavy hex bolts are manufactured in standard and custom configurations, ensuring a precise fit for demanding structural, piping, and chemical-process applications.
| Product Name | Duplex 2101 LDX Heavy Hex Bolt | Material Category | Duplex Stainless Steel |
| Material Grade | Duplex 2101 LDX (UNS S32101) | Fastener Spec | ASTM A1082 UNS S32101 |
| Dimension Spec | ASME B18.2.1 | Material Spec | ASTM A276 / A479 |
| Thread Standard | ASME B1.1 (UNC, UNF, 8UN) | Thread Tolerance | Class 2A / 3A |
The ASME B18.2.1 specification governs the physical geometry of this product. The tolerances below ensure a secure, reliable mate under service loads. Heavy hex bolts use a larger width across flats than standard hex bolts for higher-torque structural connections.
| Nominal Size (in) | Body Diameter (Max – Min) | Width Across Flats (Max – Min) | Width Across Corners (Max – Min) | Head Height (Max – Min) |
|---|---|---|---|---|
| 1/2″ | 0.515 – 0.482 | 0.875 – 0.850 | 1.010 – 0.969 | 0.323 – 0.302 |
| 5/8″ | 0.642 – 0.605 | 1.062 – 1.031 | 1.227 – 1.175 | 0.403 – 0.378 |
| 3/4″ | 0.768 – 0.729 | 1.250 – 1.212 | 1.443 – 1.383 | 0.483 – 0.455 |
| 7/8″ | 0.895 – 0.852 | 1.438 – 1.394 | 1.660 – 1.589 | 0.563 – 0.531 |
| 1″ | 1.022 – 0.976 | 1.625 – 1.575 | 1.876 – 1.796 | 0.627 – 0.591 |
| 1-1/8″ | 1.149 – 1.098 | 1.812 – 1.756 | 2.093 – 2.002 | 0.718 – 0.658 |
| 1-1/4″ | 1.277 – 1.223 | 2.000 – 1.938 | 2.309 – 2.209 | 0.813 – 0.749 |
The heavy hex head permits assembly with a standard wrench or socket while providing extra bearing area for high-load joints. Buyers should confirm the required nominal diameter, thread series, length and thread class against the purchase drawing or applicable standard before ordering.
The UNS S32101 Heavy Hex Bolt is manufactured from Duplex 2101 LDX, a duplex stainless steel. The equivalent designations below assist with cross-referencing this material against European, British and other national standards.
| US / UNS | Werkstoff Nr. (DIN) | European (EN) | British Standard (BS) | Other / AFNOR |
|---|---|---|---|---|
| S32101 | 1.4162 | X2CrMnNiN21-5-1 | – | – |
This section details the chemical composition limits and minimum mechanical properties governing Duplex 2101 LDX (UNS S32101) fasteners, as dictated by ASTM A1082 UNS S32101 (chemistry & mechanicals) and the raw bar/rod standard ASTM A276 / A479.
| Element | Composition, % |
|---|---|
| Chromium | 21.0–22.0 |
| Nickel | 1.35–1.70 |
| Manganese | 4.0–6.0 |
| Molybdenum | 0.10–0.80 |
| Nitrogen | 0.20–0.25 |
| Copper | 0.10–0.80 |
| Carbon, max | 0.040 |
| Iron | Balance |
| Condition / Temper | Tensile Strength min, psi (MPa) | Yield Strength min, psi (MPa) | Elongation min, % | Hardness |
|---|---|---|---|---|
| Solution-annealed bar (A1082) | 94 000 (650) | 65 000 (450) | 30 | ≤31 HRC |
Our Duplex 2101 LDX heavy hex bolts are specified across the following industries and service conditions, drawing on the material’s core strengths:
Service above the recommended sensitisation temperature range, or in sour/high-chloride conditions, should be reviewed with the project engineer before final material selection.
Every batch of Heavy Hex Bolts produced undergoes rigorous internal and third-party testing to ensure zero-defect delivery. We supply complete traceability with our global shipments.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
This datasheet references ASME B18.2.1 for dimensional requirements and ASTM A1082 UNS S32101 for material and fastener requirements. The applicable standard edition and purchase requirements should be confirmed for every project.
For ASME standards information, see the ASME standards catalogue. For ASTM International material and fastener specifications, see the ASTM International standards catalogue. These external references are provided for standards identification; the purchaser should verify the current edition applicable to the order.
A Duplex 2101 LDX Heavy Hex Bolt is a heavy-series hex-head bolt with a larger head and wrenching flats than a standard hex bolt manufactured from Duplex 2101 LDX (UNS S32101). The product combines the ASME B18.2.1 dimensional geometry with the ASTM A1082 UNS S32101 material and fastener requirements.
The dimensional information in this datasheet is based on ASME B18.2.1, which governs the physical geometry of this product. The table above provides the principal dimensions listed for the Duplex 2101 LDX product range.
Duplex 2101 LDX is identified as UNS S32101. The equivalent designations listed in this datasheet include Werkstoff Nr. 1.4162, EN X2CrMnNiN21-5-1, British Standard –, –.
Duplex 2101 LDX is a duplex stainless steel known for high strength combined with strong resistance to chloride stress-corrosion cracking. Service above the recommended sensitisation temperature range, or in sour/high-chloride conditions, should be reviewed with the project engineer before final material selection.
The product information supports standard and custom configurations. For a quotation, provide the required material grade, nominal size, dimensional requirement, quantity, standard and any inspection or certificate requirements.
Need a Duplex 2101 LDX Heavy Hex Bolt for an industrial project? Send the required size, quantity, standard and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: Duplex 2101 LDX / UNS S32101, nominal size, ASME B18.2.1 requirement, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
