120-4
4-strand ANSI B29.1 standard roller chain — pitch 1.5" (38.1 mm). ANSI 120 is dimensionally identical to ISO 24A — 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 | ANSI 120 / ISO 24A |
| Series | ANSI B29.1 standard roller chain |
| Strand count | 4 (4-strand) |
| Pitch | 1.5" (38.1 mm) |
| Roller diameter | 0.875" |
| Width between plates | 1" |
| Pin diameter | 0.437" |
| Plate thickness | 0.187" |
| Plate height | 1.425" |
| Min tensile (ANSI) | 112,500 lb |
| Avg tensile | 149,920 lb |
| Max allowable load | 22,550 lb |
| Mass | 15.7 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 | 120-4RB | RS | Yes |
Related Chains
Other strand counts in the same designation, plus cross-series equivalents at matching pitch.