What size drill bit is needed for install?

Hello, Thank you for your question, The mounting hole size of the rivet nut is 6.9mm, The mounting hole size of the screw is 5.2mm.

What is the maximum thickness of material the rivenuts can fasten through ?

Hello, I'm glad to answer your question. The M5 riveting nut can be used for steel plates of 0.5-3mm thickness. Gaskets and screws and nuts are made of stainless steel. The specific size can be referred to the second image of listing. Thank you

are these washers solid? (ie., flat on the bottom)

Hi, The washer is made of stainless steel CNC, The bottom is a solid plane.

What size drill but to make holes in my fenders?

Hello This rivet nut size is M5 and its bottom hole requires 7mm. So you need to drill 7mm holes. Thank you

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Stainless Steel 25 Pcs Fender Bumper Washer Bolt M5x20mm CNC Finishing Washer Engine Bay Dress Up Fastener Kit Flares Widebody kit Installation Hardware

Product ID: 251309322

Details

Brand
STETION
Colour
Type1
Item dimensions L x W x H
18 x 18 x 3
Material
Stainless
Size
Stainless

🔩25PCS premium M5x20mm bolts

⚙️Includes inner hex wrench for quick install

🛠️CNC-machined stainless steel finish

$58.65

Duties & taxes included

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Upgrade your ride with precision—because your car deserves the best hardware!

COMPLETE 25 PIECE KIT - Everything you need—washers, rivet nuts, bolts, and wrench—for seamless widebody and fender installations.
TOOL INCLUSIVE CONVENIENCE - Inner hex wrench included to eliminate guesswork and speed up your upgrade process.
PRECISION CNC STAINLESS STEEL - Engineered for durability and rust resistance, perfect for long-lasting automotive upgrades.
CORROSION RESISTANT GRADE 10 9 - Premium polished finish withstands salt spray and harsh environments without compromising style.
UNIVERSAL FIT FOR WIDEBODY KITS - Designed to flawlessly secure fenders, bumpers, ducktails, and engine bay dress-up hardware.

This 25-piece stainless steel fastener kit features M5x20mm CNC-machined bolts, washers, and rivet nuts designed for automotive widebody and fender installations. Built with corrosion-resistant Grade 10.9 stainless steel and including an inner hex wrench, it ensures durable, rust-free performance and easy installation for a professional finish.

Specifications

ASIN	B087Q24GMN
Best Sellers Rank	361,717 in Automotive ( See Top 100 in Automotive ) 49 in Car Engine Valve Cover Bolts
Brand Name	STETION
Colour	Type1
Compatible Groove Diameter	5.5 Millimeters
Fastener Type	Bolt
Finish Types	Polished
Grade Rating	Class 10.9
Item Diameter	5 Millimetres
Item Dimensions	18 x 18 x 3 millimetres
Item Shape	Rectangular
Manufacturer	STETION
Manufacturer Part Number	SH-0427-A
Material Type	Stainless Steel
Model Number	SH-0427-A
Number Of Items	25
Number of Pieces	25
Screw Head Style	Hex
Size	Stainless Steel
Thread Size	M5
UPC	756588129656
Unit Count	25.0 count

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$58.65

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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