Therwen seat bolt and nut kit for Harley-Davidson 1/4"-20 — 8 pcs silver, aluminum alloy, knurled hand-tight bolts

Therwen 8-piece seat bolt and nut kit is a direct replacement set designed to secure rear seats and fenders on many Harley-Davidson models with 1/4''-20 threads.

If you need a straightforward, durable replacement for lost or worn seat fasteners on Sportster, Softail, Touring and other common Harley-Davidson lines, this compact silver kit gives you four bolts, four matching nuts, and washers built from aluminum alloy and metal. The parts are made to resist corrosion and everyday wear while providing easy hand-tight installation and removal through knurled grips. This product description explains compatibility, materials, installation, practical benefits, and who will get the most value from this kit.

Which Harley-Davidson models will these seat bolts fit?

These fasteners are intended for Harley-Davidson motorcycles that use the 1/4''-20 thread size for seat or fender attachments. They are compatible with popular families such as Sportster, Wide Glide, Road King, Fat Bob, Softail, Dyna, Street Glide, Road Glide, Ultra Glide and many Touring models. Always verify thread size on your bike before ordering.

• Fits motorcycles using 1/4''-20 seat/fender threads
• Commonly used across Sportster, Softail, Dyna, Touring families
• Suitable for replacing lost or corroded seat bolts and nuts

What are these fasteners made from and how durable are they?

The kit combines aluminum-alloy and metal components for a balance of light weight and structural strength. The finish is designed to resist fading and surface rust under normal riding conditions, and washers are included to reduce vibration and noise. While robust, they are intended as a replacement accessory rather than load-bearing structural hardware for major repairs.

• Aluminum alloy bolts for lower weight and corrosion resistance
• Metal nuts and included washers for a secure fit and reduced rattling
• Finished surface resists fading and common road exposure

How easy is installation and removal on the road or in the garage?

Installation is straightforward: the knurled sides provide grip so you can tighten and loosen the bolts by hand—no special tools required for routine use. The design is user-friendly for quick seat removal or reattachment during maintenance or travel. For final torque or very tight fits, a standard wrench may still be used if desired.

• Knurled bolt heads allow finger-tightening and quick hand operation
• Includes matching nuts and washers for a full replacement set
• Simple swap-in installation for lost or damaged fasteners

What practical benefits will I notice after replacing my fasteners?

Replacing worn or missing seat bolts improves security and reduces seat movement and noise while riding. The included washers help distribute pressure evenly and prevent loosening due to vibration. Having a small spare set on hand also means you can address minor repairs quickly without searching for the exact thread size.

• Improves seat stability and reduces rattle on the road
• Washers help prevent loosening from vibration
• Four bolts and four nuts—enough for immediate replacements and a spare set

Who is this for: Riders and DIY mechanics who own Harley-Davidson motorcycles that use 1/4''-20 threaded seat or fender fasteners, and who want a dependable, easy-to-install repair or spare kit. This set is ideal for owners replacing missing or corroded hardware, for shop use, or for keeping a compact spare kit for touring and maintenance. Verify thread size compatibility before purchase to ensure a correct fit.