Position
Air suspension
Air suspension
Parts / FRUEHAUF
50-387
This page shows the published specs for 50-387. 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
Airlink
Spring stage
Single stage
Airlink style
Airlink Hook type
Leaf count
1
Full length (L)
43.62 in
A-side length (La)
23.66 in
B-side length (Lb)
19.96 in
Camber / free arch (C)
118/290
Material width / thickness (W)
2.99 × 1.89 in
Part details
Part numbers and reference numbers.
Start here, then compare the spring in hand.
- SRI number
- 50-387
- APM Part Number
- A505-00071-Z50
- OEM references
- 56943000
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 50-387. It includes the page link and the key specs so you do not have to type them again.
- Part number: 50-387
- Vehicle shown: FRUEHAUF
- Spring group: Airlink
- Spring stage: Single stage
- Airlink style: Airlink Hook type
- 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 · Airlink hook type spring diagram
Airlink hook type spring diagram
Use this DXF-derived Airlink hook type drawing as a general shape and measurement guide. Match the color-coded letters below to the drawing before you ask about 50-387. 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
- 43.62 in Measure eye-center to eye-center across the removed spring.
- La A-side length
- 23.66 in Measure from the front eye center to the center bolt.
- Lb B-side length
- 19.96 in Measure from the rear eye center to the center bolt. Calculated from the published L and La values.
- C Camber / free arch
- 118/290 The source gives more than one C value; confirm the correct camber with APM before relying on it.
- W Material width / thickness
- 2.99 × 1.89 in Match the first material-size value to the W width callout, then confirm the thickness stack on the removed spring pack.
- Leaf count
- 1 leaf 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 FRUEHAUF.
- Measure the length marks on the removed spring: L / full length: 43.62 in; La / a-side length: 23.66 in; Lb / b-side length: 19.96 in.
- Check Ø Eye and Ø Bush on the installed hardware before you treat this as a likely match.
- Confirm the secondary checks: C / camber / free arch: 118/290; W / material width / thickness: 2.99 × 1.89 in; leaf count: 1 leaf.
- Vehicle name and OEM numbers help narrow it down, but they do not confirm fit by themselves.