Suitable for underwater use, TruDesign range of Certified Skin Fittings designed and made in New Zealand, the Skin Fitting body and nut are moulded from a glass-reinforced nylon composite. High strength, high-modulus glass fibres provide dramatic strength, stiffness, toughness and dimensional stability. These properties allow a significant weight reduction over metallic fittings. TruDesign Skin Fittings eliminate the corrosion and electrical bonding problems associated with metallic fittings.
- ISO 9093-2021 Small craft -TRUDESIGN Skin Fittings and Ball Valves comply with ISO 9093:2021 and certified by the International Marine Certification Institute (IMCI).
- For sizes ¾” through to 3”, excludes the ½” size.
- American ABYC H-27 – 500Lb static load test - TRUDESIGN Skin Fittings and Ball Valves meet the American ABYC H-27 – 500Lb static load test; Seacocks, Thru-Hull Fittings, and Drain Plugs – independently verified by IMANNA Laboratory Inc.
- For sizes 1¼” through to 3” the ABYC Collar it is not a requirement to meet this static load test.
- TruDesign ABYC Load Bearing Collar is required for the size ¾ and 1” to meet this static load test.
- The ½” does not meet the 500Lb static load test with or without the ABYC collar




Product Highlights
- Certified.
- Complies with ISO 9093:2021 and certified by IMCI International Marine Certification Institute.
- Compatible.
- Works with many hull types - aluminium, steel, wood or GRP hulls.
- Chemical Resistant.
- Unaffected by diesel, petrol, house-hold chemicals, and antifouling paints.
- Large Operating Range.
- Suitable for all marine conditions from - 40°C to +110°C.
- UV Resistant.
- Will not degrade or discolour from the sun’s ultraviolet rays.
- Paintable.
- High quality surface finish, will not discolor and can be painted with all types of antifouling.
Models
Number | Name | Size | Weight | Thread | Color | View |
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90418 | Skin Fittings Domed | 1½" | 142g 5.01oz | BSP | BLACK | |
90419 | Skin Fittings Domed | 1½" | 142g 5.01oz | BSP | WHITE | |
90420 | Skin Fittings Domed | 1¼" | 117g 4.13oz | BSP | BLACK | |
90421 | Skin Fittings Domed | 1¼" | 117g 4.13oz | BSP | WHITE | |
90422 | Skin Fittings Domed | 1" | 68g 2.4oz | BSP | BLACK | |
90423 | Skin Fittings Domed | 1" | 68g 2.4oz | BSP | WHITE | |
90424 | Skin Fittings Domed | ½" | 35g 1.23oz | BSP | BLACK | |
90425 | Skin Fittings Domed | ½" | 35g 1.23oz | BSP | WHITE | |
90431 | Skin Fittings Domed | ¾" | 46g 1.62oz | BSP | BLACK | |
90432 | Skin Fittings Domed | ¾" | 46g 1.62oz | BSP | WHITE | |
91225 | Skin Fittings Domed | ½" | 35g 1.23oz | NPS | BLACK | |
91226 | Skin Fittings Domed | ¾" | 46g 1.62oz | NPS | BLACK | |
91227 | Skin Fittings Domed | 1" | 68g 2.4oz | NPS | BLACK | |
91228 | Skin Fittings Domed | 1¼" | 117g 4.13oz | NPS | BLACK | |
91229 | Skin Fittings Domed | 1½" | 142g 5.01oz | NPS | BLACK | |
91230 | Skin Fittings Domed | 2" | 223g 7.87oz | NPS | BLACK | |
91231 | Skin Fittings Domed | ½" | 35g 1.23oz | NPS | WHITE | |
91232 | Skin Fittings Domed | ¾" | 46g 1.62oz | NPS | WHITE | |
91233 | Skin Fittings Domed | 1" | 68g 2.4oz | NPS | WHITE | |
91234 | Skin Fittings Domed | 1¼" | 117g 4.13oz | NPS | WHITE | |
91235 | Skin Fittings Domed | 1½" | 142g 5.01oz | NPS | WHITE | |
91236 | Skin Fittings Domed | 2" | 223g 7.87oz | NPS | WHITE | |
91343 | Skin Fittings Domed | 2" | 223g 7.87oz | BSP | BLACK | |
91344 | Skin Fittings Domed | 2" | 223g 7.87oz | BSP | WHITE |
Documentation
Frequently Asked Questions
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How do I replace an old Skin Fitting (Thru Hull) with TruDesign?
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How to use the TruDesign Skin Fitting / Thru Hull Install Tool?
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Are TruDesign Ball Valves approved / compliant to international standards?
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What sealant can I use on TruDesign threads ?
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Are TruDesign Skin Fittings certified ?
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How do I identify BSP or NPS threads?