At Ananka Fasteners Pvt Ltd, we engineer, manufacture, and supply premium Phosphor Bronze C51000 (UNS C51000) Hex Bolt (Partial Thread) built for demanding service. Tin-phosphor bronze with high fatigue strength and good corrosion resistance for springs and fasteners. This technical datasheet covers the precise dimensional tolerances per DIN 931 and the material requirements dictated by ASTM F468 Gr C51000 and ASTM B139.
A Phosphor Bronze C51000 Hex Bolt with a partial thread leaves an unthreaded shank across the shear plane, which is preferred in joints designed to resist shear loading. The tables below provide the principal dimensions, equivalent material grades, chemical composition and mechanical properties covered by the technical data for this product.
Our hex bolts are manufactured in standard and custom configurations, ensuring a precise fit for demanding structural, piping, and chemical-process applications.
| Product Name | Phosphor Bronze C51000 Hex Bolt (Partial Thread) | Material Category | Copper Alloy |
| Material Grade | Phosphor Bronze C51000 (UNS C51000) | Fastener Spec | ASTM F468 Gr C51000 |
| Dimension Spec | DIN 931 | Material Spec | ASTM B139 |
| Thread Standard | ISO 261 / ISO 965 (Metric Coarse) | Thread Tolerance | 6g / 4g6g |
The DIN 931 specification governs the physical geometry of this product. The tolerances below ensure a secure, reliable mate under service loads. DIN 931 covers partially threaded hex bolts (shank plus thread).
| Nominal Thread (d) | Pitch (mm) | Width Across Flats s (mm) | Width Across Corners e (min, mm) | Head Height k (mm) |
|---|---|---|---|---|
| M6 | 1.0 | 10.00 | 11.05 | 4.0 |
| M8 | 1.25 | 13.00 | 14.38 | 5.3 |
| M10 | 1.5 | 16.00 | 17.77 | 6.4 |
| M12 | 1.75 | 18.00 | 20.03 | 7.5 |
| M16 | 2.0 | 24.00 | 26.75 | 10.0 |
| M20 | 2.5 | 30.00 | 33.53 | 12.5 |
| M24 | 3.0 | 36.00 | 39.98 | 15.0 |
| M30 | 3.5 | 46.00 | 50.85 | 18.7 |
| M36 | 4.0 | 55.00 | 60.79 | 22.5 |
An unthreaded body section is retained below the head, with threading provided only along the lower portion of the shank. Buyers should confirm the required nominal diameter, thread length, grip length and thread class against the purchase drawing or applicable standard before ordering.
The UNS C51000 Hex Bolt (Partial Thread) is manufactured from Phosphor Bronze C51000, a copper alloy. 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 |
|---|---|---|---|---|
| C51000 | 2.1016 (CuSn5) | CuSn5 | PB102 | U-E5P (AFNOR) |
This section details the chemical composition limits and minimum mechanical properties governing Phosphor Bronze C51000 (UNS C51000) fasteners, as dictated by ASTM F468 Gr C51000 (chemistry & mechanicals) and the raw bar/rod standard ASTM B139.
| Element | Composition, % |
|---|---|
| Copper | Balance |
| Tin | 4.2–5.8 |
| Phosphorus | 0.03–0.35 |
| Zinc, max | 0.30 |
| Iron, max | 0.10 |
| Condition / Temper | Tensile Strength min, psi (MPa) | Yield Strength min, psi (MPa) | Elongation min, % | Hardness |
|---|---|---|---|---|
| Spring-temper bar | 81 000 (560) | 75 000 (515) | 10 | – |
| Hard bar | 67 000 (460) | 55 000 (380) | 15 | – |
Our Phosphor Bronze C51000 hex bolts are specified across the following industries and service conditions, drawing on the material’s core strengths:
For applications exposed to highly aggressive acids or elevated temperature service, the material selection should be reviewed with the project engineer rather than choosing this alloy solely on its corrosion resistance.
Every batch of 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 DIN 931 for dimensional requirements and ASTM F468 Gr C51000 for material and fastener requirements. The applicable standard edition and purchase requirements should be confirmed for every project.
For DIN standards information, see the DIN 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 Phosphor Bronze C51000 Hex Bolt (Partial Thread) is a hex-head bolt with a partially threaded shank and an unthreaded body section manufactured from Phosphor Bronze C51000 (UNS C51000). The product combines the DIN 931 dimensional geometry with the ASTM F468 Gr C51000 material and fastener requirements.
The dimensional information in this datasheet is based on DIN 931, which governs the physical geometry of this product. The table above provides the principal dimensions listed for the Phosphor Bronze C51000 product range.
Phosphor Bronze C51000 is identified as UNS C51000. The equivalent designations listed in this datasheet include Werkstoff Nr. 2.1016 (CuSn5), EN CuSn5, British Standard PB102, U-E5P (AFNOR).
Phosphor Bronze C51000 is a copper alloy known for good corrosion resistance combined with favourable machinability or fatigue performance. For applications exposed to highly aggressive acids or elevated temperature service, the material selection should be reviewed with the project engineer rather than choosing this alloy solely on its corrosion resistance.
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 Phosphor Bronze C51000 Hex Bolt (Partial Thread) 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: Phosphor Bronze C51000 / UNS C51000, nominal size, DIN 931 requirement, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
