Heavy Hex Bolts A325 Type 1, A325 Structural Bolt

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  • Model No.: A325 Structural Bolt
  • Type: Round Head
  • Head Style: Round
  • Grade: A325 Hex Bolt
  • Finish: Fluorocarbon Coated
  • Trademark: C&N
  • Origin: China
  • Material: High Strength Steel
  • Connection: Common Bolt
  • Standard: DIN, ANSI, JIS, GOST
  • Application: Machinery
  • Specification: ASTM A325
  • Usage: Structural Connections
The ASTM A325 specification covers high-strength heavy hex structural bolts ranging from 1/2" to 1-1/2" in diameter. These bolts are specifically designed for use in structural connections and feature shorter thread lengths compared to standard hex bolts. For detailed information on thread lengths and other dimensions, please visit our Structural Bolts page. This standard applies exclusively to heavy hex structural bolts. If you're looking for bolts with similar mechanical properties but different configurations or thread lengths, refer to Specification A449. Additionally, A449 covers general-purpose bolts, including anchor bolts, as well as quenched and tempered steel bolts and studs with diameters larger than 1-1/2". ### A325 Bolt Types - **Type 1**: Medium carbon, carbon boron, or medium carbon alloy steel. - **Type 2**: Withdrawn in November 1991. - **Type 3**: Weathering steel. - **T**: Fully threaded A325 (restricted to 4 times the diameter in length). - **M**: Metric A325. ### A325 Connection Types - **SC**: Slip-critical connection. - **N**: Bearing-type connection with threads included in the shear plane. - **X**: Bearing-type connection with threads excluded from the shear plane. ### A325 Mechanical Properties | Size | Tensile (ksi) | Yield (ksi) | Elongation (%) | RA (%) | |----------------|---------------|-------------|----------------|--------| | 1/2 - 1 | 120 min | 92 min | 14 | 35 | | 1-1/8 - 1-1/2 | 105 min | 81 min | 14 | 35 | ### A325 Chemical Properties **Type 1 Bolts** | Element | Carbon Steel | Carbon Boron Steel | Alloy Steel | Alloy Boron Steel | |-----------------|--------------|--------------------|-------------|-------------------| | Carbon | 0.30–0.52% | 0.30–0.52% | 0.30–0.52% | 0.30–0.52% | | Manganese, min | 0.60% | 0.60% | 0.60% | 0.60% | | Phosphorus, max | 0.040% | 0.040% | 0.035% | 0.035% | | Sulfur, max | 0.050% | 0.050% | 0.040% | 0.040% | | Silicon | 0.15–0.30% | 0.10–0.30% | 0.15–0.35% | 0.15–0.35% | | Boron | — | 0.0005–0.003% | — | 0.0005–0.003% | | Alloying Elements | — | — | * | * | ### A325 Recommended Hardware Nuts conforming to **ASTM A194 Grade 2H** are suitable for use with A325 heavy hex structural bolts. For a complete list of compatible nuts, refer to the **ASTM A563 Nut Compatibility Chart**. **Recommended Nuts & Washers** - **Nuts**: A563C, C3, D, DH, DH3 (Plain or Galvanized) - **Washers**: A563C3, DH3, F436-1, F436-3 For further assistance or product specifications, feel free to contact our support team.

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