does this fit kohler?

I’ve installed this on two Kohler toilets. But it wasn’t easy. The hole in the toilet body is small. So you can’t push the rubber part down through the top. But you can push the top of the rubber fitting up from underneath - with some effort and squishing of the rubber top flange to force it in the hole. Once seated, however, it fits well and it seems to holding everything nicely.

Does this not use the wing nut on the bottom of the toilet hole?

The rubber part has a threaded insert. When you tighten the top the rubber is expanded in the hole of the toilet to hold it in place. These worked well for my toilet seat, which wanted to always move from side to side.

Is it possible to use longer bolts with this in order to accommodate a luxe bidet and a handrail attachment? Might need extra length..

Yes you could but you don't need to. As long as the rubber part fits in the hole... all the bolt does is squeeze the rubber to make it expand inside the porcelain. It's a compression fitting.

Mine are not holding the lid into place. Am I supposed to keep tightening?

This is an expansion bolt, and can only expand to a certain point. If your hole diameter is > the fully tightened up bolt, then you will need a bolt with a greater diameter. So yes, keep turning the screw insuring that the entire black rubber expansion in not rotating while turning the screw

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

SelfTek 4 Pack Toilet Seat Bolts, Hinge Bolt Screws Toilet Seat Fixings Fix Expanding Rubber Top Nuts Screws Mount Seat Hardware Replacement Parts Kit (for 14-16mm hole toilet seats)

SelfTek 4 Pack Toilet Seat Bolts, Hinge Bolt Screws Toilet Seat Fixings Fix Expanding Rubber Top Nuts Screws Mount Seat Hardware Replacement Parts Kit (for 14-16mm hole toilet seats)

Product ID: 70525798

Details

Brand
SelfTek
Color
Silver White
Item dimensions L x W x H
1.57 x 0.39 x
Material
Rubber+Steel
Size
One Size for

🔩4-pack durable bolts

🧽expanding rubber grip

🛠️rust-resistant stainless steel

¥3163

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

🚽 Lock it down with SelfTek – because your throne deserves the best!

BUILT TO LAST - Stainless steel screws and brass nuts resist rust and corrosion, keeping your bathroom fresh and functional.
SECURE FIT EVERY TIME - Expanding rubber nuts ensure a rock-solid hold for 14-16mm holes—no more wobbly seats.
EFFORTLESS INSTALLATION - Flexible rubber bungs slide in easily—no bottom tightening needed, saving you time and hassle.
UNIVERSAL COMPATIBILITY - Designed for top-fix toilet seats with 28mm diameter covers, fitting most modern toilets seamlessly.
TRUSTED QUALITY SUPPORT - Backed by 4.4-star reviews and responsive 24-hour customer service for peace of mind.

The SelfTek 4 Pack Toilet Seat Bolts kit features rust-resistant stainless steel screws encased in expanding rubber nuts designed for 14-16mm hole toilet seats. This premium hardware replacement ensures a secure, wobble-free fit with easy top-fix installation, compatible with 28mm diameter seat covers. Durable, corrosion-proof, and user-friendly, it’s the smart upgrade for a stable and stylish bathroom experience.

Specifications

ASIN	B078YSBS2S
Best Sellers Rank	#37,522 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #53 in Toilet Replacement Parts #222 in Toilet & Urinal Parts
Brand	SelfTek
Color	Silver, White, Black
Compatible Groove Diameter	0.55 inches
Customer Reviews	4.4 out of 5 stars 2,274 Reviews
Fastener Type	Bolt, Push, Round
Finish Types	Rubber
Item Diameter	0.67 inches
Item Dimensions	1.57 x 0.39 x 0.04 inches
Item Shape	Round
Item Weight	1.28 ounces
Item dimensions L x W x H	1.57 x 0.39 x 0.04 inches
Manufacturer	SelfTek
Material	Rubber, Steel
Material Type	Rubber, Steel
Number Of Items	4
Number of Pieces	4
Outside Diameter	0.67 inches
Part Number	SelfTek/397PHHO
Screw Head Style	Round
Set Name	Toilet Seat Fixing Kit (4 Pack)
Size	One Size for 14-16mm
Size Name	One Size for 14-16mm
Thread Size	M6
UPC	799355410915

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.