Description
The Atlas 505 is an HO scale #6 Left Hand turnout in the Atlas Super-Track Code 83 sectional line — a true scale-fidelity turnout suitable for mainline running. The #6 frog has a 9°30′ angle (tan⁻¹ 1/6 ≈ 9.46°), which corresponds to a scale-prototype turnout passable at roughly 25 mph scale speed for through trains. Accurately-spaced ties, blackened metal frog, and NMRA flangeways throughout.
Key Features
- Code 83 nickel-silver rail on simulated brown wood ties
- True #6 frog (9°30′ angle) — main-line scale-speed turnout
- Blackened metal frog (powerable via Atlas Snap-Relay)
- NMRA frog and guardrail flangeways
- Four spikes per tie, staggered per US prototype practice
- Designed for under-table switch machines or manual ground throws
- Concealed nail holes
Specifications
- Scale: HO
- Rail Code: Code 83
- Type: Custom-Line / Super-Track Turnout
- Frog Size: #6 (9°30′)
- Direction: Left Hand
- Brand: Atlas
- SKU: 505
Right-hand mate: Atlas #506. Use #6 frogs on the main line; for tighter yard ladders pair with Atlas Code 83 #4 turnouts. Combine with #500 Super-Flex (any pack size) for full sectional + flex Code 83 layouts.

