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When a roller chain snaps mid-project or a worn master link finally gives out, every minute of downtime counts. Whether you are a machine operator, agricultural equipment technician, or a hands-on DIYer maintaining conveyor systems or go-karts, having the right roller chain connecting link on hand is the difference between a quick fix and a costly delay.
These roller chain connecting links are available in two styles — Full Link Buckle and Half Link Buckle — and span a wide range of ISO standard pitches from 04C (6.35 mm / 0.25 in) up to 32A (50.8 mm / 2.0 in). Each link is machined from carbon steel with a zinc-plated or natural finish depending on the model, and is engineered to match the load ratings of the corresponding chain series.
Typical applications include replacing master links on bicycle drive chains (04C–08B), reconnecting industrial conveyor roller chains (10A–20A), servicing agricultural machinery drive systems (16A–32A), and maintaining go-kart or small engine power transmission chains (06B–12A).
Wide Size Range (04C–32A) — Covers pitches from 6.35 mm (0.25 in) to 50.8 mm (2.0 in), matching the most common ISO roller chain series used in industrial, agricultural, and recreational applications.
Full Link & Half Link Styles — Full Link Buckle provides a standard-length connection for most repairs; Half Link Buckle allows precise chain-length adjustment by adding half a pitch, ideal when a full link would leave the chain too long.
Carbon Steel Construction — Manufactured from carbon steel to deliver tensile strength consistent with the rated load capacity of each chain series, resisting deformation under cyclic loading.
Corrosion-Resistant Finish — Zinc-plated surface treatment on applicable models helps resist oxidation in moderately humid environments, extending service life compared to bare steel links.
ISO-Compliant Dimensions — Pin diameter, plate thickness, and inner width conform to ISO 606 / DIN 8187 / DIN 8188 standards, ensuring drop-in compatibility with matching chain series without modification.
Flexible Pack Quantities — Available in 1 pc, 2 pcs, or 5 pcs per order, so you can stock exactly what your maintenance schedule demands without over-ordering.
| Product Type | Roller Chain Connecting Link (Master Link) |
|---|---|
| Available Styles | Full Link Buckle / Half Link Buckle |
| Chain Series Range | 04C, 06B, 06C, 08A, 08B, 10A, 10B, 12A, 12B, 16A, 16B, 20A, 24A, 28A, 32A |
| Pitch Range | 6.35 mm (0.25 in) — 50.8 mm (2.0 in) |
| Material | Carbon Steel |
| Surface Treatment | See variant options |
| Standard Compliance | ISO 606 / DIN 8187 / DIN 8188 |
| Inner Width | See variant options |
| Pin Diameter | See variant options |
| Tensile Strength | See variant options |
| Pack Quantity Options | 1 PCS / 2 PCS / 5 PCS |
| Application | Industrial conveyor, agricultural machinery, go-kart, bicycle drive chain repair |
Match the number stamped on your existing chain or measure the pitch — the center-to-center distance between two adjacent pins. For example, a pitch of 12.7 mm (0.5 in) corresponds to 08A or 08B series. Cross-reference with the chain plate width to distinguish A-series (narrower) from B-series (wider) within the same pitch.
A Full Link Buckle adds one complete pitch length to the chain when installed, making it the standard choice for most repairs. A Half Link Buckle adds half a pitch, allowing you to shorten or lengthen a chain by an odd number of half-pitches — useful when a full link would leave the chain either too tight or too loose for your sprocket center distance.
Yes. These links are manufactured from carbon steel and dimensioned to ISO 606 / DIN 8187 / DIN 8188 standards, meaning their rated tensile strength matches that of the corresponding chain series. Always verify that the chain series tensile rating meets or exceeds the working load of your specific application, and apply an appropriate safety factor per your engineering guidelines.
The links feature a zinc-plated finish on applicable models, which provides moderate resistance to oxidation in typical outdoor or humid workshop environments. For continuous exposure to rain, salt spray, or chemical wash-down environments, consider applying a chain lubricant or selecting stainless steel chain hardware for extended service life.
These connecting links conform to ISO 606 / DIN 8187 / DIN 8188 dimensional standards, which are followed by the vast majority of roller chain manufacturers worldwide. As long as your chain is an ISO-standard roller chain of the matching series (e.g., 10A, 12B), the link should fit. If your chain is a proprietary or non-standard design, please contact us to confirm compatibility before ordering.
Thread the link's pins through the chain ends, slide the outer plate over the pins, then seat the spring clip (if included) into the pin grooves with the closed end facing the direction of chain travel. For press-fit master links, use a chain press tool to seat the outer plate fully. Always inspect the clip orientation — an incorrectly installed clip can disengage under load.
For a single repair, 1 pc is sufficient. If you maintain multiple machines or the same chain regularly, 2 pcs or 5 pcs provides a cost-effective spare stock. The 5-pcs option is particularly useful for workshop or fleet maintenance where unplanned chain breaks need an immediate fix without waiting for a reorder.
