🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
Sloan Nut 400338 - Bubbles Supply

Sloan Nut 400338

Part #: 400338

$0.72
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

Upload a Photo
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this hardware/other

The Sloan Nut 400338 is an OEM hex nut designed to secure light lens assemblies in Sloan spa lighting systems. This 3/8-16 threaded nut works specifically with Sloan's 400372 lens to provide reliable mounting for underwater spa lights. Manufactured to Sloan's exact specifications, this replacement nut ensures your spa lighting maintains proper waterproof sealing and secure lens positioning.

Built for durability in wet spa environments, this genuine Sloan hex nut delivers the precise threading and corrosion resistance your lighting system requires. At Bubbles Supply, we guarantee this is the exact fit for your Sloan lighting assembly, ship same-day for fast repairs, and back every part with our full 1-year warranty. When replacing, ensure the lens gasket is properly seated before tightening to maintain watertight integrity and optimal lighting performance.

Exact part number

400338

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 3/8-16 spa light nut
  • lens retaining nut
  • light lens nut
  • Sloan hex nut

Looking for an older part number? Check our supersession lookup tool

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Lens rattling or shifting inside light assembly
  • Light lens falling out or not seating securely
  • Water intrusion into light housing due to loose lens
  • Visible corrosion or stripping on existing retaining nut
  • Light assembly leaking around lens edge

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your light assembly uses Sloan part number 400372 lens — this nut is matched to that specific lens
  • Verify existing nut thread spec is 3/8-16 before ordering
  • Inspect the lens gasket while you have the assembly apart — replace if compressed or cracked
  • Check that the light housing threads are clean and undamaged before installing replacement nut
  • Do not overtighten — hand-snug plus a quarter turn is typically sufficient to seat the gasket without cracking the lens

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Easy — DIY-friendlyTypically 15–30 minutes

Warranty

1 year manufacturer warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment