25-1
single-strand ANSI B29.1 standard roller chain — pitch 0.25" (6.35 mm). ANSI 25 is dimensionally identical to ISO 04C — 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 25 / ISO 04C |
| Series | ANSI B29.1 standard roller chain |
| Strand count | 1 (single-strand) |
| Pitch | 0.25" (6.35 mm) |
| Roller diameter | 0.13" |
| Width between plates | 0.125" |
| Pin diameter | 0.091" |
| Plate thickness | 0.03" |
| Plate height | 0.23" |
| Min tensile (ANSI) | 780 lb |
| Avg tensile | 1,050 lb |
| Max allowable load | 140 lb |
| Mass | 0.094 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 | 25RB | RS | Yes |
Related Chains
Other strand counts in the same designation, plus cross-series equivalents at matching pitch.