Steering and Suspension Adjustment
Adjustable linkage hardware helps set length and alignment in steering, suspension, sway-bar, and control-rod assemblies. Use the correct right-hand/left-hand thread combination and lock the adjustment after setup.
related-product-inchRELATED PRODUCT
LBA10-39 LBAX10-39 ALBA10-39 Linkage Adjuster
Part No.: LBA10-39
· Thread-adjustment and fabrication hardware series
✓ ISO 9001 Certified
✓ SGS Verified
✓ 26+ Years Factory
✓ OEM / ODM Ready
M UNF-3A Left Hand 5/8-18
F UNF-2B Right Hand 5/8-18
Female-male adjuster for threaded linkage tuning
Carbon steel, chromoly, and aluminum material options
Left-hand to right-hand adjustment architecture
Special sizes available in production volume
LBA Material
Carbon steel, silver zinc plated
LBAX Material
Alloy steel, heat treated, chromoly steel, silver zinc plated
ALBA Material
Aluminum, black anodized
Special Sizes
Available in volume
⚡ Typically responds within 24 hours
MOQ:50 pcs / model
Lead Time:7–15 days
Sample:Free (excl. freight)
Payment:T/T · PayPal · L/C
Overview
LINKAGE ADJUSTER Product Overview
LBA10-39 / LBAX10-39 / ALBA10-39 is a female-male linkage adjuster with 5/8-18 LH male thread and 5/8-18 RH female thread. Overall length (A) = 3.875″, body length (B) = 1.935″, male thread length (C) = 1.475″, female thread bore reach (D) = 1.375″, hex diameter (E) = 0.875″.
The LBA (carbon steel, zinc plated), LBAX (4130 chromoly, heat treated, zinc plated), and ALBA (aluminum, black anodized) linkage adjusters thread one rod end into the female socket and one into the male shank. Turning the body extends or shortens the assembly — a low-profile alternative to jack screws for steering links, tie rods, and pull-pull control systems. LH/RH thread combination allows adjustment without removing end fittings.
Carbon steel: LBA10-39. Chromoly: LBAX10-39. Aluminum: ALBA10-39. Special lengths available in volume. Metric size LBA-M10 available for metric rod ends.
Size Chart
LINKAGE ADJUSTER Series — Full Size Range
All available sizes in the LINKAGE ADJUSTER series. Can’t find your size? Contact us for custom dimensions.
| Carbon Steel | Chromoly Steel | Aluminum | M UNF-3A Left Hand | F UNF-2B Right Hand | A Ref. | B +.020 -.020 | C +.062 -.031 | D +.062 -.031 | E Ref. |
|---|---|---|---|---|---|---|---|---|---|
| LBA6-19 | LBAX6-19 | ALBA6-19 | 3/8-24 | 3/8-24 | 1.850 | 1.181 | 0.510 | 0.750 | 0.563 |
| LBA6-29 | LBAX6-29 | ALBA6-29 | 3/8-24 | 3/8-24 | 2.875 | 1.250 | 1.250 | 0.812 | 0.563 |
| LBA6-34 | LBAX6-34 | ALBA6-34 | 3/8-24 | 3/8-24 | 3.435 | 1.620 | 1.160 | 1.060 | 0.563 |
| LBA7-31 | LBAX7-31 | ALBA7-31 | 7/16-20 | 7/16-20 | 3.125 | 1.375 | 1.375 | 0.937 | 0.688 |
| LBA8-34 | LBAX8-34 | ALBA8-34 | 1/2-20 | 1/2-20 | 3.375 | 1.500 | 1.500 | 1.062 | 0.750 |
| LBA8-36 | LBAX8-36 | ALBA8-36 | 1/2-20 | 1/2-20 | 3.625 | 1.810 | 1.350 | 1.250 | 0.750 |
| LBA10-38 | LBAX10-38 | ALBA10-38 | 5/8-18 | 5/8-18 | 3.813 | 1.813 | 1.625 | 1.375 | 0.938 |
| LBA10-39 | LBAX10-39 | ALBA10-39 | 5/8-18 | 5/8-18 | 3.875 | 1.935 | 1.475 | 1.375 | 0.875 |
| LBA12-41 | LBAX12-41 | ALBA12-41 | 3/4-16 | 3/4-16 | 4.125 | 2.000 | 1.750 | 1.562 | 1.125 |
| LBA12-41-1 | LBAX12-41-1 | ALBA12-41-1 | 3/4-16 | 3/4-16 | 4.125 | 2.000 | 1.600 | 1.500 | 1.000 |
| LBA12-47 | LBAX12-47 | ALBA12-47 | 3/4-16 | 3/4-16 | 4.650 | 2.000 | 2.500 | 1.562 | 1.000 |
| LBA16-61 | LBAX16-61 | ALBA16-61 | 1 - 12 | 1 - 12 | 6.125 | 3.125 | 2.500 | 2.500 | 1.312 |
| LBA20-66 | LBAX20-66 | ALBA20-66 | 1.25-12 | 1.25-12 | 6.625 | 3.375 | 2.750 | 2.750 | 1.625 |
| LBA-M10 | LBAX-M10 | ALBA-M10 | M10 x 1.50 | M10 x 1.50 | 88mm | 41mm | 29.5mm | 27mm | 15.85mm |
Quality Control
Every Unit Inspected Before Shipment
Raw Material Inspection
Material certifications verified. Composition confirmed by spectrometer before machining begins.
Thread Gauge Inspection
100% go/no-go gauge check on all threaded sections. Zero tolerance on dimensional non-conformance.
Load Capacity Test
Static and dynamic load tests run on representative samples from each production batch.
Dimensional Measurement
CMM verification of critical dimensions — ball diameter, bore, thread pitch, and body length.
Surface Inspection
Visual and tactile inspection for burrs, scratches, surface cracks, and plating defects.
Articulation Test
Misalignment angle and torque measured to confirm liner performance meets specification.
Heat Treatment Verify
Hardness tests confirm proper heat treatment on chromoly steel bodies and bearing balls.
Batch Documentation
Full traceability from raw material heat number to finished part. COC and inspection reports available.
Applications
Where LINKAGE ADJUSTER Are Used
Related Products
All Products →More from the LINKAGE ADJUSTER Series
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FAQ
LINKAGE ADJUSTER Frequently Asked Questions
What is the LBA10-39 linkage adjuster used for?
The LBA10-39 (and its LBAX10-39 chromoly / ALBA10-39 aluminum siblings) is a female-male linkage adjuster with a 5/8-18 LH male thread and 5/8-18 RH female thread — thread one rod end into each side, then rotate the body to extend or shorten the assembly, a low-profile alternative to jack screws for steering links, tie rods, and pull-pull control systems.
What are the overall dimensions of the LBA10-39?
Overall length (A) is 3.875 in., body length (B) is 1.935 in., male thread length (C) is 1.475 in., female thread bore reach (D) is 1.375 in., and hex diameter (E) is 0.875 in..
What material options are available for this 5/8-18 linkage adjuster?
Three material variants share this size: LBA10-39 in carbon steel (silver zinc plated), LBAX10-39 in 4130 chromoly (heat treated, silver zinc plated), and ALBA10-39 in aluminum (black anodized).
How does the LH/RH thread combination on the LBA10-39 work?
The male end uses a 5/8-18 left-hand thread and the female end a 5/8-18 right-hand thread, so rotating the hex body extends or shortens the linkage without needing to remove the rod ends threaded into either side.
Are custom lengths or metric sizes available for this adjuster?
Yes. Special lengths are available in volume, and SYZ also offers a metric LBA-M10 size for metric rod ends alongside this 5/8-18 inch/metric size.
What should I confirm with SYZ before ordering the LBA10-39?
Confirm which material variant you need (LBA10-39 carbon steel, LBAX10-39 chromoly, or ALBA10-39 aluminum) and your required overall length, since special sizes are available in volume on request.