Description
Genuine Dometic Seat Mounting Hardware for 310/320/321 Series Gravity-Flush Toilets
Restore a secure, wobble-free seat attachment on your Dometic 310, 320, or 321 series toilet with this genuine seat mounting hardware kit in bone. Over time, the bolts and wing nuts holding your toilet seat hinges in place can loosen, strip, or corrode — causing a seat that shifts, rocks, or won't stay tightly attached. This kit includes everything needed to properly remount your seat hinges, restoring a stable, secure fit without needing to replace the entire seat.
Compatible With:
- Dometic 310 Series gravity-flush toilets
- Dometic 320 Series gravity-flush toilets
- Dometic 321 Series gravity-flush toilets
What's Included:
- 2 x mounting bolts (approx. 3/8" diameter x 1-15/16" length, 3/4" head)
- 2 x wing nuts
- 2 x bolt caps/covers (1-1/16" diameter x 1/4" thick)
Key Features:
- Genuine Dometic OEM replacement part
- Bone color to match your existing toilet finish
- Includes both fastener bolts and finished caps for a clean, factory-look installation
- Simple hand-tool installation — no special equipment required
How to Confirm This Is the Right Kit for You
This kit is designed specifically for Dometic 310, 320, and 321 series gravity-flush toilets and comes in bone to match that color finish. If your toilet is white, you'll want part #385311650 instead. If you're not sure of your toilet's exact model or need the seat itself replaced (not just the mounting hardware), check your toilet's data plate or contact us to confirm the correct part.
Frequently Asked Questions
Does this include the seat itself?
No — this kit includes only the mounting hardware (bolts, wing nuts, and caps) used to attach your existing seat's hinges to the toilet bowl. If you need a full seat and lid replacement, look for the Dometic 310 Seat & Lid Kit instead.
What's the difference between this and part #385311650?
385311651 is the bone-colored version of this hardware kit; 385311650 is the identical kit in white. Choose the one that matches your toilet's finish.
My seat is loose/wobbly — will this fix it?
Yes — loose or wobbly seats are most commonly caused by worn, stripped, or corroded mounting bolts and wing nuts. This kit replaces those exact components to restore a tight, secure seat attachment.
Will this fit my Dometic 300 series toilet?
This specific kit is designed for 310/320/321 series toilets. For the base 300 series, Dometic offers a separate mounting hardware and seal kit (part #385311653) — check your toilet's exact model number before ordering.
Is this a special order item — how long will it take?
Yes, this is a special order item with an estimated delivery of 2–3 weeks, since it's sourced directly from Dometic upon order.
You May Also Need
- White Seat Mounting Hardware Kit (part #385311650) — if your toilet is white instead of bone
- Dometic 310 Series Seat & Lid, Bone (part #385311931)
- Dometic 300 Series Mounting Hardware & Seal Kit, Bone (part #385311653)
Special Order – Estimated 2–3 Week Lead Time
Please note: This is a special order item.
- Estimated lead time: 2–3 weeks
- Lead times may vary based on Dometic manufacturing and availability
- Special order items are non-cancelable and non-returnable once the order has been placed with the manufacturer, except in the case of a warranty issue or shipping damage
- Orders containing both in-stock and special-order items may ship separately or be held until all items are available
