Position
Rear
Rear
Parts / FORD
43-1705
This page shows the published specs for 43-1705. Compare them with the spring in hand before you 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 send the right inquiry without retyping everything.
Spring group
Multi-leaf
Spring stage
Progressive
Leaf count
3+1
Full length (L)
66.54 in
A-side length (La)
33.27 in
B-side length (Lb)
33.27 in
Camber / free arch (C)
6.26 in
Eye inside diameter (Ø Eye)
A-side 1.77 in · B-side 1.69 in
Bushing diameter (Ø Bush)
A-side 0.79 in · B-side 0.63 in
Material width / thickness (W)
2.99 × 0.50 × 0.87 in
Load capacity
3600 lb
Published load details, when shown here, are secondary checks alongside the spring in hand. Ask APM USA to confirm fit before you buy.
Part details
Part numbers and reference numbers.
Start here, then compare the spring in hand.
- SRI number
- 43-1705
- APM Part Number
- A433-52831-M50
- OEM references
- 7C345560DF · 7C345A975DF · 7C3Z5560DB
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 as-is.
Use the prefilled email to ask about price, stock, or fit for 43-1705. It includes the page link and the key specs so you do not have to type them again.
- Part number: 43-1705
- Vehicle shown: FORD F350SDD
- Spring group: Multi-leaf
- Spring stage: Progressive
- Email includes: page link, specs, reference numbers, and any load or weight details shown on this page.
- More than one part? Use the inquiry list to combine several part numbers into one inquiry.
Opens your email app with a draft to ask@mrapmusa.com and includes the page link and specs shown above. Existing customers can keep going in customer login.
Measurement guide
Measure the spring in hand at these points.
This is a general measuring guide for the spring in hand. It is not an exact factory print for this part.
Selected diagram · Multi-leaf progressive spring diagram
Multi-leaf progressive spring diagram
Use this DXF-derived multi-leaf progressive drawing as a general shape and measurement guide. Match the color-coded letters below to the drawing before you ask about 43-1705. This is a general fitment guide, not an exact factory print.
L
Full eye-center to eye-center length
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
Inside diameter of the spring eye
Ø Bush
Installed bushing diameter
W
Spring pack width; confirm thickness from the material-size row
- L Full length
- 66.54 in Measure eye-center to eye-center across the removed spring.
- La A-side length
- 33.27 in Measure from the front eye center to the center bolt.
- Lb B-side length
- 33.27 in Measure from the rear eye center to the center bolt. Calculated from the published L and La values.
- C Camber / free arch
- 6.26 in Measure vertically at the center bolt from the eye-center line to the spring pack.
- Ø Eye Eye inside diameter
- A-side 1.77 in · B-side 1.69 in Check the inside diameter of the spring eye at both ends.
- Ø Bush Bushing diameter
- A-side 0.79 in · B-side 0.63 in Check the installed bushing diameter at both ends.
- W Material width / thickness
- 2.99 × 0.50 × 0.87 in Match the first material-size value to the W width callout, then confirm the thickness stack on the removed spring pack.
- Leaf count
- 3+1 leaves Count the main leaves in the pack and compare the spring layout before asking about fit.
Before you ask
Check these points first.
- Compare this part number to the spring tag, old invoice, or service record for FORD F350SDD.
- Measure the length marks on the removed spring: L / full length: 66.54 in; La / a-side length: 33.27 in; Lb / b-side length: 33.27 in.
- Check the hardware marks: Ø Eye / eye inside diameter: A-side 1.77 in · B-side 1.69 in; Ø Bush / bushing diameter: A-side 0.79 in · B-side 0.63 in.
- Confirm the secondary checks: C / camber / free arch: 6.26 in; W / material width / thickness: 2.99 × 0.50 × 0.87 in; leaf count: 3+1 leaves.
- Load or weight details shown on this page: Load capacity: 3600 lb. Use them as secondary checks only, not as a fit confirmation by themselves.
- Vehicle name and OEM numbers help narrow it down, but they do not confirm fit by themselves.