Catalog status
Active catalog
Rear
Parts / Ford
43-621
Published specs for 43-621. Compare them with the spring in hand, then ask about price, stock, or fit.
Technical record
Part numbers, specs, and how to ask about this part.
Use these published details to compare the spring in hand and ask about the right part.
Position
Rear
Spring group
Multi-leaf
Spring stage
Progressive
Leaf count
5+1
A-side length (La)
23-13/16"
B-side length (Lb)
31"
Camber / free arch (C)
5-3/4"
Eye Diameter (Ø Eye)
A-side 1-3/8" · B-side 1-1/4"
Width / thickness (W)
Width 3" · Thickness 5/16" × 5/16" × 13/16"
Load capacity
2900 lb
Published load details are backup checks. Compare the spring in hand and ask APM USA to confirm fit before you buy.
Part details
Part number and references.
Start here, then compare the spring in hand.
- SRI number
- 43-621
- Catalog status
- Active catalog
- OEM references
- D5UA5560LB · D5UZ5560E · D5UZ5660E
These reference numbers help you check the listing. The guide below is only a general measuring guide for the spring in hand.
Inquiry
Send this part page with details included.
Ask about price, stock, or fit for 43-621. The email includes the page link and specs.
- Part number: 43-621
- Catalog status: Active catalog
- Vehicle shown: Ford E250, E350 2900LBS CAP.
- Spring group: Multi-leaf
- Spring stage: Progressive
- Email includes: page link, specs, reference numbers, and any load or weight details shown.
- More than one part? Add each one to the inquiry list and send them together.
Opens an email draft to [email protected] with the page link, status, and specs. Existing customers can keep going in customer login.
Measurement guide
Measure the spring in hand.
Use this as a measuring guide for the spring you removed. It is not a factory drawing for this part.
Selected diagram · Multi-leaf progressive spring diagram
Multi-leaf progressive spring diagram
Use this diagram as a measurement guide. Match the letters below against 43-621. This is not a factory print.
La
A-side eye center to center bolt
Lb
B-side eye center to center bolt
C
Camber / free arch at the center bolt
Ø Eye
Spring eye diameter
W
Spring pack width; confirm thickness from the material-size row
#L
Main leaf count in the spring pack
- La A-side length
- 23-13/16" Measure from the front eye center to the center bolt.
- Lb B-side length
- 31" Measure from the rear eye center to the center bolt. Source length pair.
- C Camber / free arch
- 5-3/4" Measure vertically at the center bolt from the eye-center line to the spring pack.
- Ø Eye Eye Diameter
- A-side 1-3/8" · B-side 1-1/4" Check the spring eye diameter at both ends.
- W Width / thickness
- Width 3" · Thickness 5/16" × 5/16" × 13/16" Match the Width value to the W callout, then confirm the listed thickness value or stack.
- Leaf count
- 5+1 leaves Count the main leaves in the pack and compare the spring layout.
Before you send it
Check these basics first.
- Check this part number against the spring tag, old invoice, or service record for Ford E250, E350 2900LBS CAP..
- Measure the length marks on the removed spring: La / a-side length: 23-13/16"; Lb / b-side length: 31".
- Check the hardware marks: Ø Eye / eye diameter: A-side 1-3/8" · B-side 1-1/4".
- Confirm the secondary checks: C / camber / free arch: 5-3/4"; W / width / thickness: Width 3" · Thickness 5/16" × 5/16" × 13/16"; leaf count: 5+1 leaves.
- Load or weight details on this page: Load capacity: 2900 lb. Use them as backup checks. They do not confirm fit by themselves.
- Vehicle name and OEM numbers help narrow the search. They do not prove fit by themselves.