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When a worn or broken connecting link brings your conveyor, drive system, or machinery to a halt, every minute of downtime costs you. Whether you're a maintenance technician keeping production lines running, a cyclist replacing a worn chain link, or a DIY builder assembling custom drive systems, you need a connecting link that installs fast and holds under load. These stainless steel roller chain connecting links with full buckle closure are engineered for exactly that job.
Each connecting link consists of a side plate, roller pin, and spring clip (full buckle) machined to match standard ANSI roller chain dimensions. Available in six chain sizes — #25 (04C-1), #35 (06B-1), #40 (08B-1), #50 (10A-1), #60 (12A-1), and #80 (16A-1) — with inner widths and pin diameters sized to match each standard. Constructed from stainless steel for corrosion resistance in wet, outdoor, and chemically exposed environments. Pitch ranges from approximately 6.35 mm (1/4 in) for #25 up to 25.4 mm (1 in) for #80.
Typical applications include replacing connecting links on ANSI roller chain conveyor systems, repairing agricultural equipment drive chains, maintaining go-kart or small engine drive chains (#35/#40), and building custom power transmission assemblies where corrosion resistance is required. Long-tail use cases: stainless steel roller chain master link replacement, ANSI #40 connecting link for conveyor repair, #50 chain joining link corrosion resistant.
| Product Type | Roller Chain Connecting Link (Master Link) |
|---|---|
| Closure Type | Full Buckle (Spring Clip) |
| Material | Stainless Steel |
| Available Chain Sizes | #25 (04C-1), #35 (06B-1), #40 (08B-1), #50 (10A-1), #60 (12A-1), #80 (16A-1) |
| Chain Standard | ANSI / ISO |
| Pitch Range | 6.35 mm – 25.4 mm (1/4 in – 1 in), varies by size |
| Quantity per Unit | 1 Piece (complete link set) |
| Finish | Natural Stainless (uncoated) |
| Pin Diameter | See variant options |
| Inner Width | See variant options |
| Tensile Strength | See variant options |
Match the ANSI number stamped on your existing chain or sprocket. Common identifiers: #25 = 04C-1 (1/4 in pitch), #35 = 06B-1 (3/8 in pitch), #40 = 08B-1 (1/2 in pitch), #50 = 10A-1 (5/8 in pitch), #60 = 12A-1 (3/4 in pitch), #80 = 16A-1 (1 in pitch). If unsure, measure the distance between three consecutive pins and divide by two to get the pitch.
Stainless steel connecting links offer good tensile strength suitable for light-to-medium duty conveyor and drive applications. For very high-load industrial drives, verify the tensile rating matches your system's working load. Stainless steel trades some tensile strength versus hardened carbon steel but gains significantly in corrosion resistance — a worthwhile trade-off in wet or outdoor environments.
Stainless steel provides strong resistance to rust and oxidation in outdoor, humid, and mildly corrosive environments. For exposure to saltwater or strong acids, consider periodic inspection. Unlike carbon steel links, these do not require frequent re-oiling to prevent surface rust.
The size designations listed (e.g., 04C-1, 06B-1) correspond to ISO/DIN chain standards, which are dimensionally equivalent to the ANSI numbers (#25, #35, etc.) for single-strand chains. These connecting links are compatible with both ANSI and ISO single-strand roller chains of the matching pitch.
No special tools are required. Thread the pins through the chain ends and outer side plate, then press the spring clip onto the pin grooves using needle-nose pliers or your fingers. The spring clip snaps into the retaining grooves to lock the link. Removal is equally straightforward — pry the clip off with a flathead screwdriver or clip tool.
It is generally recommended to replace the connecting link each time it is removed, as the spring clip can lose tension after repeated installation and removal cycles. For critical drive applications, always install a fresh link. For low-load or occasional-use applications, reuse is possible if the spring clip shows no deformation and snaps firmly into the pin grooves.
A full buckle (or master link) connecting link uses a removable outer side plate and spring clip to join two chain ends, allowing the chain to be opened and closed without a chain breaker tool. A half-link is a single asymmetric link used to adjust chain length by half a pitch. These listings are full buckle connecting links intended for joining chain ends, not for length adjustment.
