Spring bars - Seiko Prospex King Turtle/Samurai 4R35 4R36 / SRP Diver Watch - 2 Pcs

Premium spring bars compatible with Seiko

Reinforced spring bars, also known as pins , designed for Seiko watch bracelets and professional diving watches. Available in 2.0 mm or 2.5 mm diameters, they ensure an ultra-stable attachment, reduce bracelet play, and offer optimal wrist comfort.

Manufactured to a higher standard than original parts, these spring bars use premium 316L stainless steel , the same alloy as high-end watch cases. Their stronger spring ensures optimal bracelet retention, even in extreme conditions (diving, sports, humidity).

Compatibility

Features

• Material: 304 or 316L stainless steel (watchmaking grade, high corrosion resistance)
• Center diameter: 2.0 mm or 2.5 mm
• Tip: 1.1 mm (precise and secure locking)
• Width: depending on the lug width (e.g., 20 mm / 22 mm)
• Packaging: Pack of 2 pieces

Benefits

• Superior quality to original Seiko models
• Firmer spring for better support
• Strong and durable fixing
• Optimal resistance to water, corrosion and impacts
• Increased wrist comfort

Advice

Before purchasing, accurately measure the lug width of your watch to ensure compatibility. The 2.5 mm diameter corresponds to a “Fat Spring Bar” model – thicker than standard versions, ideal for dive watches and heavy cases.