Hexagon Bolts
- ANSI B18.2.1
- ANSI B18.2.3.1M
- DIN 931
- DIN 933
- BS 1768
- UNI 5731
- UNI 5737
- UNI 5739
- ISO 4014
- ISO 4017
- BS 1769
- BS 3692

Silicon bronze 613 is a corrosion resistant copper alloy. It is used as a welding rod and for mechanical fasteners and electrical connections. Alloy 613 has excellent corrosion resistance.
| Equivalent Designation | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ASTM/ASME | AISI | UNS | British Standard | Werkstoff No. | En Name | Swedish(SS) | JIS(SUS) | ||
| – | – | C65500 | – | – | – | – | |||
TorqBolt manufactures Silicon Bronze 613 Fasteners via cold forging, hot forging and CNC machining. Sizes range from M1.0 to M100 (metric) and 1/16" to 4" (imperial). Available in coarse, fine, UNC, UNF, UN, BSW and acme threads with half, full or double-end thread configurations. Each Silicon Bronze 613 Fasteners batch is supplied with EN 10204 3.1 or 3.2 material test certificates.