Description
Boat part number 1115769 is a new electric swim platform step hinge bracket for 2021 R4 / R8 Cobalt Boats, part number 407322 .
This swim platform step hinge is constructed out of polished stainless steel. It measures approximately 53 1/4″ W x 12 1/2″ H x 17 1/2″ D overall when deployed and 53 1/4″ W x 8 1/4″ H x 14″ D when stowed. See photos for additional measurements.
Please check with your local boat brand dealer for boat / brand / model / year cross-referencing compatibilities.
Tag reads: KIT, E-STEP JMS R4 R8 ’21
Specifications:
- Boat Manufacturer: Cobalt
- Model: R4 / R8
- Year: 2021
- Part Number: 407322
- Material: Stainless Steel
- Color: Silver
- Finish: Polished
- Deployed Dimensions: 53 1/4″ W x 12 1/2″ H x 17 1/2″ D
- Stowed Dimensions: 53 1/4″ W x 8 1/4″ H x 14″ D
- Mounts: (13) mounting holes


![Rapala Combo Pack – Pliers, Clipper, PunchSharpener [RTC-6PCHS]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/rapala-combo-pack-pliers-clipper-punchsharpener-rtc-6pchs.webp)
![GROCO 1-1/4″ Bronze Electric Flanged Seacock – 12V [FBVE-1250 12V]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/groco-1-1-4-bronze-electric-flanged-seacock-12v-fbve-1250-12v.webp)

![Ancor 24-22 Gauge Heat Shrink Step-Down Multi-Wire Connectors – 25-Pack[320025]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/ancor-24-22-gauge-heat-shrink-step-down-multi-wire-connectors-25-pack-320025.webp)
![Xantrex C-Series Solar Charge Controller – 40 Amps [C40]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/xantrex-c-series-solar-charge-controller-40-amps-c40.webp)
![Whitecap C.P. Brass Sillcock 1-5/8″ Base 3-3/16 Depth[P-2452C]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/whitecap-c-p-brass-sillcock-1-5-8-base-3-3-16-depth-p-2452c.webp)

![Blue Sea 1221 12V DC Main + 19 Positions w/Digital Meter[1221]](https://www.durablemarinebattery.com/wp-content/uploads/2026/08/blue-sea-1221-12v-dc-main-19-positions-w-digital-meter-1221.webp)