Spring Bar - Seiko Prospex Monster 4R36 SRP Diver's Watch - 2 Pcs

Seiko Compatible Premium Spring Bars

Reinforced spring bars, also called pins , designed for Seiko watch straps and professional diving watches. Available in 2.0 mm or 2.5 mm diameter, they provide ultra-stable fixation, reduce strap play and offer optimal comfort on the wrist.

We manufacture these spring bars to a higher standard than the original Seiko parts ( ref. C220FS ), using Premium 316L stainless steel , the same alloy used in high-end watch cases. Our customers have noted a higher quality and a firmer spring than the original models, providing better bracelet retention, even in extreme conditions (diving, sports, humidity).

Compatibility

Features

• Material: 304 or 316L stainless steel (watchmaking quality, 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: Set of 2 pieces

Benefits

• Superior quality to original Seiko models
• Firmer spring for better hold
• Strong and durable fixation
• Optimal resistance to water, corrosion and shocks
• Increased wrist comfort

Advice

Before purchasing, carefully 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 diving watches and heavy cases.