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: 205142226

Details

Brand
STETION
Color
Type1
Item dimensions L x W x H
0.71 x 0.71 x
Material
Stainless
Size
#5-20

🔩25PCS premium stainless steel fasteners

⚙️M5x20mm bolts with extended threaded bite

🛠️CNC-machined precision finish

131.52 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🔧 Elevate your build with precision-engineered stainless steel hardware—because your ride deserves the best.

EXTENDED BOLT LENGTH - M5x20mm bolts provide superior threaded engagement for secure, reliable fastening beyond the standard.
DURABILITY THAT LASTS - Crafted from corrosion-resistant stainless steel with salt spray tested quality—no rust, no compromise.
PRECISION CNC MACHINING - Sleek polished finish and exact fit engineered for professional-grade automotive dress-up projects.
UNIVERSAL FIT VERSATILITY - Perfect for fenders, bumpers, engine bays, license plates, and widebody kits—upgrade your ride with confidence.
COMPLETE 25 PIECE FASTENER KIT - Everything you need for flawless widebody and fender installs—washers, bolts, rivet nuts, plus an inner hex wrench for zero hassle.

This 25-piece stainless steel fastener kit includes washers, rivet nuts, and M5x20mm bolts, all CNC-machined for precision and durability. Salt spray tested for corrosion resistance, it’s designed for automotive widebody kits, fenders, and engine bay dress-up applications. The included inner hex wrench ensures easy installation, making it a professional-grade solution for millennial car enthusiasts seeking both style and reliability.

Specifications

ASIN	B087Q24GMN
Best Sellers Rank	#159,666 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #442 in Screw & Bolt Assortment Sets
Brand	STETION
Color	Type1
Compatible Groove Diameter	5.5 millimeters
Customer Reviews	4.3 4.3 out of 5 stars (357)
Fastener Type	Bolt, Rivet
Finish Types	Polished
Item Diameter	5 millimeters
Item Dimensions	0.71 x 0.71 x 0.14 inches
Item Shape	Round
Manufacturer	STETION
Material Type	Stainless Steel
Model	SH-0427-A
Number Of Items	25
Number of Pieces	25
Part Number	SH-0427-A
Screw Head Style	Hex
Set Name	25-Piece Stainless Steel Fender Bumper Washer Bolt Kit
Size Name	#5-20
Thread Size	m5-0.8
UPC	756588129656
Unit Count	25 Count

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131.52 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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