Boat Straight Thru-Hull Fitting with ABS Body and Stainless Steel Cover
Product Description
This plastic straight thru-hull fitting with stainless steel cover is designed for boats, yachts, and other marine applications that require a compact above-waterline outlet or drainage connection. It combines an ABS plastic body with a mirror-polished stainless steel cover to provide practical corrosion resistance and a cleaner finished appearance after installation.
The plastic body helps reduce weight and supports good resistance to the marine environment, while the stainless steel trim cover improves the visible finish on hull or deck surfaces. The fitting is designed for straightforward installation without a separate mounting base or screw-fixed faceplate.
Available in multiple sizes from 5/8 inch to 2 inch, this straight thru-hull fitting is suitable for a range of hose and outlet requirements. It is intended for above-waterline use only and is not recommended for below-waterline installations.
Key Features
ABS body with stainless steel cover
The fitting combines an ABS plastic body with a stainless steel trim cover for corrosion resistance and improved appearance.
Straight thru-hull design
The straight outlet structure supports direct hose connection for drainage or discharge applications.
Multiple size options
Available in 5/8″, 3/4″, 1″, 1-1/4″, 1-1/2″, and 2″ sizes to suit different installation needs.
Easy installation
The fitting is designed for simple installation without a separate front mounting plate or screw-on cover.
Suitable for above-waterline use
This product is intended for above-waterline drainage and outlet applications.
Technical Specifications
| Model | Size | A | B | C | D | E | F | Weight |
|---|---|---|---|---|---|---|---|---|
| SM0621-16 | 5/8″ | 65 mm | 33 mm | 15 mm | 23 mm | 16 mm | 10.5 mm | 26 g |
| SM0621-20 | 3/4″ | 74.5 mm | 39 mm | 18 mm | 26.5 mm | 19 mm | 12 mm | 33 g |
| SM0621-25 | 1″ | 85.5 mm | 48 mm | 24 mm | 33 mm | 25 mm | 17 mm | 63 g |
| SM0621-32 | 1-1/4″ | 99 mm | 60 mm | 33 mm | 42 mm | 32 mm | 23 mm | 99 g |
| SM0621-38 | 1-1/2″ | 106 mm | 70 mm | 37.5 mm | 48 mm | 38 mm | 28.5 mm | 111 g |
| SM0621-50 | 2″ | 126 mm | 86 mm | 48 mm | 60 mm | 50 mm | 41 mm | 180 g |
Applications
This boat straight thru-hull fitting is suitable for:
- boat and yacht above-waterline drainage
- marine outlet connections
- deck and hull discharge points
- lightweight marine plumbing systems
- other above-waterline hose outlet applications
It is a practical choice for buyers looking for a lightweight thru-hull fitting with a cleaner stainless steel face finish.
Installation Notes
Before ordering or installation, buyers should confirm:
- required hose size
- panel or hull thickness
- outlet diameter
- installation location
- whether the fitting will be used above the waterline
This product is not recommended for below-waterline use. Proper sealant and compatible hose clamps should be used during installation.
Material and Use Notes
The main body is made from ABS plastic, while the visible trim cover is finished in stainless steel for a more polished appearance. This construction is suitable for many marine and outdoor uses where lightweight installation and visual finish are important.
For below-waterline or higher-pressure applications, a heavier-duty marine thru-hull fitting should be selected.
FAQ
1. What is this thru-hull fitting used for?
It is used as an above-waterline outlet or drainage fitting for boats, yachts, and similar marine applications.
2. What material is it made from?
It has an ABS plastic body with a stainless steel cover.
3. What sizes are available?
It is available in 5/8″, 3/4″, 1″, 1-1/4″, 1-1/2″, and 2″ sizes.
4. Can it be used below the waterline?
No. This fitting is not recommended for below-waterline use.
5. Is it easy to install?
Yes. The fitting is designed for straightforward installation and direct hose connection.
