Genuine AxleTek Trailer Axle U-Bolt | U-bolts Kit | 8" Long for 8,000 lb 3.5" Axle | width 9/16-18 APUBR35 - | 21-104

Genuine AxleTek Trailer Axle U-Bolt | U-bolts Kit | 8" Long for 8,000 lb 3.5" Axle | width 9/16-18 APUBR35 - | 21-104

This trailer axle u-bolt is specified as U-bolts Kit, 8" Long for 8,000 lb 3.5" Axle, width 9/16-18 APUBR35 -. This is a genuine AxleTek component identified by part number 21-104. It is intended for service, repair, or replacement work where the listed dimensions and application details match the trailer.

Key Specifications

• U-bolts Kit
• 8" Long for 8,000 lb 3.5" Axle
• Width 9/16-18 APUBR35 -
• Part/SKU: 21-104

Application and Fitment

Designed for compatible trailer suspension applications. Match axle tube shape and diameter, bolt diameter, inside width, length, and plate requirements. Trailer parts that look similar can use different dimensions or ratings, so use the stamped part number and physical measurements as the final fitment check.

Before You Order

Inspect the related components for wear and compare every listed measurement with the part being replaced. Installation should follow the trailer or component manufacturer's procedures and applicable torque specifications.

Why Buy from Trailer Parts Plus?

Trailer Parts Plus supplies practical replacement trailer suspension for utility, cargo, boat, equipment, and commercial trailers. Need help confirming 21-104? Have your axle rating, measurements, and existing part numbers ready so the correct match can be verified.