Supplier Guidance
Need a U.S. material match for CAC403?
CAC403 is a JIS high-tin bronze. Its chemistry is closer to high-tin bronze families such as C90300 than to leaded SAE 660 / C93200 bearing 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 | CAC403 | C90300 |
|---|---|---|
| Copper (Cu) | 86.5-89.5% | 86.0-89.0% |
| Tin (Sn) | 9.0-11.0% | 7.5-9.0% |
| Zinc (Zn) | 1.0-3.0% | 3.0-5.0% |
| Lead (Pb) | 1.0% max. | 0.30% max. |
| Practical conclusion | JIS high-tin bronze | Review against C90300; not a C93200 / SAE 660 chemistry match |
Ranges checked against public JIS CAC403 references and C90300 high-tin bronze composition data.
Where This Cross-Reference Helps
This page helps maintenance, machine tool, automotive, and industrial sourcing teams translate a JIS drawing into a U.S. material review path.
If your print uses CAC403, 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: CuSn10Zn2, CC481K, CuSn10-C, ZCuSn10Zn2, CAC402, CuSn10Zn2, BS1400 PB1, PB1.
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
Check the JIS drawing, casting condition, lead content, mechanical properties, and required inspection documents before ordering a U.S. equivalent.
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 C90300
Once the material match looks right, the next question is usually shape and machining route. Precision Bronze can quote C90300 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. 
Custom CNC Bronze Parts Custom CNC machined bronze components, bushings, lead screw nuts, wear parts, and replacement parts made from drawings or samples.