20B-3
triple-strand ISO 606 B-series roller chain — pitch 1.25" (31.75 mm). ISO 606 B-series — interchangeable across all major brands at matching designation.
Pricing not yet available.
We're building pricing coverage for chain. In the meantime, this cross-reference shows the equivalent designations and per-brand part numbers so you can source the right chain from any supplier — the ANSI / ISO standard guarantees the dimensional match.
Specifications
| Designation | 20B |
| Series | ISO 606 B-series roller chain |
| Strand count | 3 (triple-strand) |
| Pitch | 1.25" (31.75 mm) |
| Roller diameter | 0.75" |
| Width between plates | 0.77" |
| Pin diameter | 0.401" |
| Plate thickness | 0.173" |
| Plate height | 1.024" |
| Min tensile (ANSI) | 66,319 lb |
| Max allowable load | 10,341 lb |
| Mass | 7.7 lb/ft |
| Pin type | riveted |
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Equivalents Across Brands
ANSI B29.1 / ISO 606 standardize all primary dimensions across manufacturers — chains at matching designation are dimensionally interchangeable. Always verify brand-rated working load against your application before substitution.
| Brand | Part Number | Grade name | OEM |
|---|---|---|---|
| Tsubaki | RS20B-3RB | RS | Yes |
Related Chains
Other strand counts in the same designation, plus cross-series equivalents at matching pitch.