Keep the number & suffix
Record the full FMSI or OE reference. For 4709, specify ES or ES II; do not discard a suffix from your work order.
Fitment guide
A number is the start.
The brake details finish the match.
Use the existing parts and brake specification. Truck make and nominal size alone are not enough.
Confirm diameter & width
4702 is a 15″ × 4″ reference. 4719 and 4720 both use 16.5″ × 5″ nominal dimensions, with different brake platforms.
Compare the actual shoe
Match anchor and roller ends, web construction, spring-hole positions and hardware. Check heavy-duty or relocated-hole variants.
Specify friction & duty
Provide the existing friction specification and operating conditions. A mileage label does not establish equivalent braking performance.
A COMMON COMPARISON
Same size.
Different platform.
4719 and 4720 share 16.5″ × 5″ nominal dimensions. Use the brake family and construction to distinguish the application.
Compare the 5-inch referencesBEFORE YOU BUILD YOUR LIST
Questions worth resolving.
Does a matching FMSI number guarantee interchangeability?
No. Confirm the brake platform, construction, friction material and required hardware. The number is an identification reference.
How is one kit counted?
The requested format is two lined shoes and matched hardware for one wheel position. Confirm the quantity needed for the actual brake job; a kit is not a full axle or complete brake assembly.
What if the part is not listed?
Keep the complete reference, brake platform, dimensions, quantity and any variant notes. Include these in your parts inquiry.
Who confirms the application before installation?
The complete specification must be confirmed before ordering, and a qualified installer must verify suitability for the actual brake application.
Fitment comes first. These are nominal references. Match the platform, shoe construction, friction specification and hardware before supply.
Identification guide