ZB0402
RICHWITS
ZB0402
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Material: 316 marine-grade stainless steel (A4)
Sizes: 38 × 76 mm | 38 × 102 mm
Type: Heavy-duty solid casting, excellent mirror-polished finish
Applications: Windshield, cabinet, deck flush hatch, compartment doors, etc.
Features: Good construction, flexibility, durability and strong load-bearing capacity
| Advantage | Benefit |
|---|---|
| Fresh- & Mild-Salt Resistance | Ideal for inland-river & coastal craft |
| High Cost-Effectiveness | Premium 316 performance at competitive pricing |
| Superior Oxidation Resistance | Mirror polish stays rust-free after years of deck exposure |
| Enhanced Seawater Resistance | Molybdenum formula outperforms 304 in severe salt spray |
| Harsh Environment Tolerance | Withstands high-temp, high-humidity & oil-gas in engine rooms |
| High Tensile & Yield Strength | Handles heavy hatches & waterproof doors with ease |
| Item | 38 × 76 mm | 38 × 102 mm |
|---|---|---|
| Material | AISI 316 (A4) marine-grade SS | AISI 316 (A4) marine-grade SS |
| Width | 38 mm | 38 mm |
| Length | 76 mm | 102 mm |
| Thickness | 4.5 mm | 4.5 mm |
100% brand-new, investment-cast & CNC-machined.
Dimensions ±0.2 mm; slight polish variation does not affect performance.


| Application | Function | Marine Value |
|---|---|---|
| Wheelhouse Doors | Inner/outer door hinge | Smooth swing + corrosion resistance in control area |
| Engine Room Access Doors | Load-bearing hinge for power-room doors | Resists high temp, oil mist & humid vibration |
| Deck Hatch Covers | Flip hinge for open-deck hatches | Survives 24/7 sea-wind & salt-spray attack |
| Crew Cabin Doors | Interior/exterior cabin door hinge | Moisture-proof, rust-free for living spaces |
| Galley Storage Cabinet Doors | Hinge for kitchen wall cabinets | Resists moisture & oil-fume corrosion |
| Bathroom Partition Doors | Hinge for wet/dry area dividers | Adapts to high-humidity, water-prone environment |
What material is this hinge made from?
100% AISI 316 (A4) marine-grade stainless steel with 2–3% molybdenum for lifetime salt-water immunity.
What is the load capacity per pair?
Laboratory-tested at 140 kgf (76 mm) / 160 kgf (102 mm) static load per pair, surviving 50,000 open/close cycles without deformation.
How does the polished finish help in marine environments?
The 400-grit mirror polish (Ra ≤ 0.4 µm) seals surface pores and passes 1,000 h ASTM B117 salt-spray testing.
What are the exact dimensions and mounting details?
38 mm width × 76/102 mm length × 4.5 mm thickness; 6–8 × Ø5 mm countersunk holes on 25 × 58/84 mm centers; M5 SS316 screws included.
Can this hinge replace my existing 38×76 mm boat hinge?
Yes—industry-standard footprint allows direct drop-in replacement with no re-cutting required.
Do you offer custom sizes or faster delivery?
Send your drawing; we can adjust length, hole pattern, or upgrade to electropolished finish within 10 days.


Material: 316 marine-grade stainless steel (A4)
Sizes: 38 × 76 mm | 38 × 102 mm
Type: Heavy-duty solid casting, excellent mirror-polished finish
Applications: Windshield, cabinet, deck flush hatch, compartment doors, etc.
Features: Good construction, flexibility, durability and strong load-bearing capacity
| Advantage | Benefit |
|---|---|
| Fresh- & Mild-Salt Resistance | Ideal for inland-river & coastal craft |
| High Cost-Effectiveness | Premium 316 performance at competitive pricing |
| Superior Oxidation Resistance | Mirror polish stays rust-free after years of deck exposure |
| Enhanced Seawater Resistance | Molybdenum formula outperforms 304 in severe salt spray |
| Harsh Environment Tolerance | Withstands high-temp, high-humidity & oil-gas in engine rooms |
| High Tensile & Yield Strength | Handles heavy hatches & waterproof doors with ease |
| Item | 38 × 76 mm | 38 × 102 mm |
|---|---|---|
| Material | AISI 316 (A4) marine-grade SS | AISI 316 (A4) marine-grade SS |
| Width | 38 mm | 38 mm |
| Length | 76 mm | 102 mm |
| Thickness | 4.5 mm | 4.5 mm |
100% brand-new, investment-cast & CNC-machined.
Dimensions ±0.2 mm; slight polish variation does not affect performance.


| Application | Function | Marine Value |
|---|---|---|
| Wheelhouse Doors | Inner/outer door hinge | Smooth swing + corrosion resistance in control area |
| Engine Room Access Doors | Load-bearing hinge for power-room doors | Resists high temp, oil mist & humid vibration |
| Deck Hatch Covers | Flip hinge for open-deck hatches | Survives 24/7 sea-wind & salt-spray attack |
| Crew Cabin Doors | Interior/exterior cabin door hinge | Moisture-proof, rust-free for living spaces |
| Galley Storage Cabinet Doors | Hinge for kitchen wall cabinets | Resists moisture & oil-fume corrosion |
| Bathroom Partition Doors | Hinge for wet/dry area dividers | Adapts to high-humidity, water-prone environment |
What material is this hinge made from?
100% AISI 316 (A4) marine-grade stainless steel with 2–3% molybdenum for lifetime salt-water immunity.
What is the load capacity per pair?
Laboratory-tested at 140 kgf (76 mm) / 160 kgf (102 mm) static load per pair, surviving 50,000 open/close cycles without deformation.
How does the polished finish help in marine environments?
The 400-grit mirror polish (Ra ≤ 0.4 µm) seals surface pores and passes 1,000 h ASTM B117 salt-spray testing.
What are the exact dimensions and mounting details?
38 mm width × 76/102 mm length × 4.5 mm thickness; 6–8 × Ø5 mm countersunk holes on 25 × 58/84 mm centers; M5 SS316 screws included.
Can this hinge replace my existing 38×76 mm boat hinge?
Yes—industry-standard footprint allows direct drop-in replacement with no re-cutting required.
Do you offer custom sizes or faster delivery?
Send your drawing; we can adjust length, hole pattern, or upgrade to electropolished finish within 10 days.

