What material should marine hardware be made of?

For most exposed hardware, 316 stainless steel is the marine standard — it resists salt corrosion far better than 304 stainless or plated steel. Marine-grade aluminum, UV-stabilized nylon, and King StarBoard are also common for non-structural fittings.

How do I know a replacement seat or hatch will fit?

Measure the mounting pattern (bolt spacing), the cutout or base dimensions, and any post diameter or height on the part you’re replacing. Match those to the new part’s specs — outfitting parts follow common sizes but are not universal, so confirming dimensions avoids returns.

Do I need backing plates for deck hardware?

For anything that takes load — grab rails, cleats, ladder steps, seat pedestals — yes. A backing plate spreads the load across a larger area of the deck or transom so fasteners don’t pull through under stress.

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Scanstrut

Scanstrut APT-250-01-B - Aluminum PowerTower® Radar Mount - 10" Aft Leaning - Black

Manufacturer: ScanstrutPart #: APT-250-01-BLKSKU: 85090

Aluminum

$605.00● In stock

Item #: 85090

Category: Radar/TV Mounts

● In stock — ships fast from US warehouses

Ships from US warehouses
Free shipping on orders over $99
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Genuine marine-brand parts, not knockoffs
30-day returns
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Description

APT-250-01-B - Aluminum PowerTower® Radar Mount - 10" Aft Leaning - Black The Scanstrut Aluminum PowerTower® is engineered for outstanding strength and with an unparalleled surface finish. Manufactured using the best marine grade Aluminium, PowerTower® is molded as a single 'monocoque' structure with no joints, offering unparalleled strength and durability.

Designed to install your radar on the roof, T-top, flybridge or radar arch of your powerboat, providing the clearest view of the horizon allowing you to get the best performance from your radar in all conditions. By elevating your antenna clear of obstructions, PowerTower® maximizes the performance of your radar.

There is a PowerTower® to fit pretty much every modern radar. Compatible with: B & G - HALO20, HALO20+, HALO24 radars Garmin - Fantom 18, 24, GMR18HD / 18xHD / 18HD+, GMR24HD / 24xHD, GMR40 radars Humminbird - HB 2124 CHIRP radar KVH - TracPhone V3-HTS, TracVision M2, M3, TV3, V3 radars Lowrance - 3G/4G radars Raymarine - QUANTUM (Q24C), QUANTUM 2 (Q24D), RD218, RD418/RD418HD, RD424/RD424HD radars Simrad - 3G/4G, DX45, DX60 / DX64-S, GB40 / NX40/45 / NSE8/12 radars Sitex - RADARpc - 4D radar Features: Designed to fit the most up to date radars Pre-drilled mounting holes allow the radar to fasten straight to the PowerTower® No need to cut the radar’s connectors off for installation Constructed from the best Marine grade Aluminium Range of accessories light bars can be bolted to the back of the PowerTower® Technical Specifications: Radar Type - Dome Material - Aluminium Height - 9.

84" (250mm) Mounting Type - Aft leaning - 25° In the Box: Mount Mounting hardware (excluding screws/bolts) Installation manual *Sold as an Individual

Specifications

Brand	Scanstrut
Part Number	APT-250-01-BLK
EverTide SKU	85090
UPC	5060114797697
Material	Aluminum

Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.

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Complete your setup

Scanstrut

Scanstrut APT-150-01-BLK - Aluminum PowerTower® Radar Mount - 6" Aft Leaning - Black

$575.00

Returns & warranty

Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.

Scanstrut productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.

Boat Outfitting — frequently asked

What material should marine hardware be made of?: For most exposed hardware, 316 stainless steel is the marine standard — it resists salt corrosion far better than 304 stainless or plated steel. Marine-grade aluminum, UV-stabilized nylon, and King StarBoard are also common for non-structural fittings.
How do I know a replacement seat or hatch will fit?: Measure the mounting pattern (bolt spacing), the cutout or base dimensions, and any post diameter or height on the part you’re replacing. Match those to the new part’s specs — outfitting parts follow common sizes but are not universal, so confirming dimensions avoids returns.
Do I need backing plates for deck hardware?: For anything that takes load — grab rails, cleats, ladder steps, seat pedestals — yes. A backing plate spreads the load across a larger area of the deck or transom so fasteners don’t pull through under stress.

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