Supplier Guidance
Need a U.S. material match for Rg5?
For many cast red brass or gunmetal parts, Rg5 is commonly sourced in the U.S. as C83600 / SAE 40, also known as 85-5-5-5 bronze.
Use this page to start the sourcing conversation, then send the drawing, dimensions, quantity, and operating conditions so the final material can be checked before production.
Equivalent at a Glance
Engineering Check
Material Data to Review Before Quoting
This table gives your engineering, purchasing, or quality team a fast way to compare the source callout with the U.S. material starting point. It supports RFQ review; it does not replace the approved drawing or material specification.
| Item to compare | Rg5 | C83600 |
|---|---|---|
| Copper (Cu) | 84.0-86.0% | 84.0-86.0% |
| Tin (Sn) | 4.0-6.0% | 4.0-6.0% |
| Lead (Pb) | 4.0-6.0% | 4.0-6.0% |
| Zinc (Zn) | 4.0-6.0% | 4.0-6.0% |
| Practical conclusion | DIN Rg5 / CuSn5ZnPb leaded gunmetal | Direct C83600 / SAE 40 red brass cross-reference |
Ranges checked against public Rg5 / CuSn5ZnPb data and C83600 / SAE 40 leaded red brass composition references.
Where This Cross-Reference Helps
This cross-reference is most useful for valves, fittings, pump parts, pressure-tight castings, and general machined red brass components.
If your print uses Rg5, include the full drawing, tolerances, quantity, required supply form, and inspection notes with the RFQ. That lets us quote the material and manufacturing route with fewer back-and-forth questions.
Related Specifications You May See
The same material family may also appear under these names or standards: CuSn5Zn5Pb5, CC491K, ZCuSn5Pb5Zn5, CAC406, CuSn5Pb5Zn5, Rg5, DIN 1705 Rg5, BS1400 LG2, LG2.
If one of these appears on your drawing or purchase record, include it with the RFQ. It helps us understand the original specification and avoid quoting a material that only looks similar on paper.
Before You Substitute the Material
Do not approve C83600 for bearing service, pressure service, or regulated applications without checking the drawing, load, corrosion exposure, and lead-content requirements.
Cross-reference charts are helpful for purchasing and maintenance teams, but they do not replace a formal material specification, mill certificate, or customer-approved drawing.
Available Forms
Common supply forms for C83600
Once the material match looks right, the next question is usually shape and machining route. Precision Bronze can quote C83600 as standard stock or finished parts depending on the drawing, size, tolerance, and quantity.
Custom CNC Bronze Parts Custom CNC machined bronze components, bushings, lead screw nuts, wear parts, and replacement parts made from drawings or samples. 
Plain Bronze Sleeve Bushings Plain bronze sleeve bushings and cast bronze sleeve bearings in C93200 SAE 660 and alternative alloys for radial load applications. 
Flanged Bronze Bushings Flanged bronze bushings and cast bronze sleeve bearings with an integral thrust face for radial support and axial location.