Will they rust as going to used externally

It will depend a lot on what you intend to use them for, and what environment they will be exposed to. A2 stainless steel is equivalent to stainless grade 304, which is generally fairly resistant to rusting, but not as resistant as 316 grade (A4 stainless). 316 is used significantly in food preparation areas, for example, where surfaces are substantially wet and / or exposed to aggressive cleaning regimes. If they're going to be installed near the sea, or used in an application that would expose them to an aggressive atmosphere, then they will suffer from a minimum of discolouration, and possibly some light surface rust. I have seen 304 grade stainless steel degrade both badly and very quickly in the presence of an atmosphere with an elevated chlorine vapour, so the full answer isn't simply yes or no. If they'll be miles from the sea, then under normal ambient conditions they should retain their appearance for a significant period. Regardless, I would expect that they will not suffer from the same degradation as other (e.g. BZP) fixings. Hope this helps.

Is there M6 bolts with bigger heads? Best wishes

Not normally as they are made to standards and all Cap screws normally have 10mm dia heads

Can you get M6 bolts with larger heads? Best wishes

Not a standard. Manufacturers often get specials made for particular products which are available as spares from those manufacturers. Large button heads for motorcycle plastic fairings springs to mind.

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M6 (6mm x 20mm) Button Head Screws Allen Socket Bolts A2 Stainless Steel Screws (Pack of 20) - F01B 6x20_20

Product ID: 220637915

Details

Exterior finish
Stainless
Head style
Socket
Material
Stainless
Point style
Flat Point
Thread size
M6

📏20mm length precision

🔩6mm thread diameter

🛠️4mm Allen key socket

4652 Ft

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Description

🔩 Elevate your build with screws that mean business!

DURABLE A 2 STAINLESS STEEL - Corrosion-resistant for long-lasting strength and reliability.
ISO 7380 STANDARD COMPLIANCE - Guaranteed quality and compatibility with industry norms.
PACK OF 20 FOR BULK EFFICIENCY - Ideal for managers who value both quality and quantity.
FULLY THREADED FOR MAXIMUM GRIP - Optimizes fastening power across the entire length.
PRECISION ENGINEERED M 6 THREADS - Ensures a perfect fit for your professional projects every time.

The M6 (6mm x 20mm) Button Head Screws are crafted from premium A2 stainless steel, fully threaded to ISO 7380 standards, and designed with a 4mm Allen socket for secure fastening. Sold in packs of 20, these screws combine durability, precision, and bulk convenience—perfect for professionals who demand reliability and efficiency in every project.

Specifications

ASIN	B08DL6F8Q3
Best Sellers Rank	100,462 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,743 in Screws (DIY & Tools)
Brand Name	Screws City
Colour	Silver
Compatible Groove Diameter	6 Millimeters
Country Of Origin	Taiwan
Customer Reviews	4.6 4.6 out of 5 stars (656)
Drive System	Internal Hex
Exterior Finish	Stainless Steel
Fastener Size	6mm
Fastener Type	Allen Key
Grade Rating	A2
Head Type	Socket
Item Diameter	10.5 Millimetres
Manufacturer	Screws City
Manufacturer Part Number	HU-XI-201
Material Type	Stainless Steel
Metal	Stainless Steel
Number Of Items	20
Number of Packs	1
Number of Pieces	20
Outside Diameter	10.5 Millimetres
Screw Head Style	Socket
Screw Point Style	Flat Point
Set Screw Thread Type	M
Size	M6 x 20mm
Thread Class	M
Thread Coverage	Fully Threaded
Thread Size	M6
Thread Style	Right Hand
Thread Type	Metric
Unit Count	20 count

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4652 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered 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 Hungary.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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