U-BOLT 3.5" X 7-7/8" - 9/16"-18 (8K 3.5" AXLE TUBE) - 854-1123
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U-Bolt — 3.5" x 7-7/8", 9/16"-18 Thread (8,000 lb · 3.5" Round Axle Tube)
Round-bend trailer axle U-bolt sized to wrap a 3.5" diameter round axle tube on 8,000 lb (8K) axles. It clamps the axle to the leaf spring through the tie plate, secured with lock nuts on each leg. Built to OE fit and finish for a direct, no-guesswork replacement. Sold individually.
🔧 Key Features
✔ Round bend formed to seat flush on 3.5" round axle tubes
✔ 9/16"-18 UNF thread on both legs for a secure, torque-to-spec clamp
✔ 7-7/8" leg length — correct reach for 8K axle and spring stacks
✔ Engineered for 8,000 lb axle applications
✔ Direct-fit replacement for worn or corroded U-bolts
Specifications
| Axle Tube Diameter | 3.5" round |
| Bend Width | 3.5" |
| Leg Length | 7-7/8" |
| Thread | 9/16"-18 UNF |
| Axle Capacity | 8,000 lb (8K) |
| Manufacturer Part # | UBR-350800-56F |
| Supersedes | 011-315-01 |
| Dexter Reference | 011-123-01 |
| SKU | 854-1123 |
Part References
Mfg# UBR-350800-56F · Old Mfg# 011-315-01 · Dexter 011-123-01
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