Supplier Guidance
Need a U.S. material match for Rg7?
For many legacy DIN drawings, Rg7 is the designation behind a leaded tin bearing bronze that is commonly sourced in the U.S. as C93200 / SAE 660.
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 | Rg7 | C93200 |
|---|---|---|
| Copper (Cu) | 81.0-85.0% | 81.0-85.0% |
| Tin (Sn) | 6.0-8.0% | 6.3-7.5% |
| Lead (Pb) | 5.0-8.0% | 6.0-8.0% |
| Zinc (Zn) | 2.0-5.0% | 1.0-4.0% |
| Practical conclusion | Legacy DIN Rg7 / CuSn7Zn4Pb7 bearing bronze | Close C93200 / SAE 660 bearing bronze match |
Ranges checked against public Rg7 / CuSn7Zn4Pb7-C references and C93200 composition data from the Copper Development Association style datasheets.
Where This Cross-Reference Helps
This cross-reference is useful when you are sourcing sleeve bushings, thrust washers, bearing plates, pump bushings, or replacement bronze parts from an older European print.
If your print uses Rg7, 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: CuSn7Zn4Pb7, CC493K, ZCuSn7Pb7Zn4, CAC403, CuPb7Sn7Zn4, Rg7, DIN 1705 Rg7, BS1400 LB4, LB4.
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
Before approving the substitution, confirm the drawing requirement, casting method, mechanical properties, and any certificate 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 C93200
Once the material match looks right, the next question is usually shape and machining route. Precision Bronze can quote C93200 as standard stock or finished parts depending on the drawing, size, tolerance, and quantity.
Bronze Solid Bar Bronze solid round bar and rod stock for machining bushings, bearings, pins, spacers, gears, and custom bronze parts. 
Bronze Cored Bar Bronze cored bar and hollow bar stock for efficient machining of sleeve bushings, bearings, rings, and bronze components. 
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. 
Bronze Thrust Washers Bronze thrust washers and bearing washers machined from C93200 SAE 660 and high-strength bronze alloys for axial load support.