NTMODS® - Backplate

NTMODS®
316L Stainless Steel Backplate

Solid CNC-Cut 316L Marine-Grade Steel

This is not a thin stamped plate.

This backplate is CNC-cut from solid 316L marine-grade stainless steel and finished to match the tolerances and rigidity of the NTMODS® case system. Built for constant skin contact, sweat exposure, and long-term durability, it replaces lightweight factory plates with true full-metal construction.

Low-carbon 316L steel offers high corrosion resistance, hypoallergenic skin safety, and superior structural rigidity. The result is improved case compression, stronger sealing surface contact, and a more complete all-metal build.

How It Works

1. Add to Cart.

2. A required installation form will appear:

   • Select whether you want me to install it or ship it separately.

3. Checkout as usual.

If you are ordering this with a Custom Build and select Install it, I will professionally install the part before shipping your watch (no extra fee).

If you select Ship separately, you will receive the part individually for DIY installation.

If you are purchasing this part only, simply choose Ship separately.

Material & Construction

• Solid CNC-cut 316L marine-grade stainless steel
• Low-carbon composition for corrosion resistance
• Hypoallergenic and skin-safe
• Precision-machined screw channels
• Increased rear-case rigidity
• Enhanced gasket compression surface

This completes the structural system from the back forward.

Colors & Finishes

Silver – Natural brushed 316L finish
Gold & Black – Ion-Bond PVD coated

Ion-Bond PVD is not paint and not standard plating.

• Molecularly bonded to the steel surface
• Far stronger than paint or conventional coating
• Even, uniform tone across the surface
• Highly wear-resistant
• Long-term color stability

Engineered to match NTMODS® case finishes precisely.

Installation (DIY Friendly)

Installation uses your existing screws and gasket, or compatible NTMODS® hardware.

For best results:

• Inspect gasket condition before installation
• Tighten screws evenly in a cross pattern
• Avoid power tools to protect threads

When installed properly, factory-level water resistance can be maintained.

Fully compatible with hydromod builds when installed and sealed properly.

Compatibility Notes

Perfect Fit - No Modification Required

• Casio AE1200 / Module 3299

• Casio AE1300 / Module 3426

• Casio WS1600 / Module 3556

When paired with the NTMODS® Case, overall rigidity and sealing integrity are reinforced further.

Important Notes

This listing includes the backplate only.
Any other components are sold separately.

Compatibility Disclaimer:
This part is engineered to fit original stock Casio components as well as NTMODS® parts when used with the compatible models listed above.
I cannot guarantee fitment, alignment, or water resistance performance when using cases, faceplates, backplates, bracelets, or components from other manufacturers.

Compatibility issues caused by third-party parts are not my responsibility.

Sound Notice:
Because this backplate is solid 316L stainless steel and significantly thicker than the original stock plate, the alarm and beep sound may be slightly more muted compared to the factory backplate.

This is normal.

The added mass and rigidity that improve durability and sealing also reduce resonance. All functions work exactly the same, but the sound output may be slightly dimmer.

There are no functional compromises, only an acoustic difference caused by the increased mass of solid steel.