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LOOK-ALIKE PARTS / SPEC COMPARISON
H 3514 vs. H 3505
Treat these as non-interchangeable. The square and teardrop steel-window operators have different handle spindles: 3/8 inch versus 5/16 inch. A similar housing footprint does not establish a compatible replacement.
| Specification | H 3514 | H 3505 |
|---|---|---|
| Mechanism / profile | Straight arm | Straight arm |
| Hand | Left | Left |
| Handle spline | 3/8" | 5/16" |
| Finish / hardware package | Aluminum | Bronze |
| Profile | Square housing | Teardrop housing |
| Steel arm length | 9" | 9" |
| Fitment | Steel-framed casement windows with matching worm-gear mechanism. | Steel-framed casement windows with matching worm-gear mechanism. |
| Original source | Check source ↗ | Check source ↗ |
The interchangeability warning is an editorial conclusion from the documented differences above. Always check the supplier’s current drawing and your original part.