I'm installing a new bumper on my 1997 Chevy Blazer LS, 2-door, 2 wheel drive, 4.3 liter V6. While I'm at it, I'd like to replace the rusty bolts with brand new bolts, because I live in an area where metal rusts quickly.

When I measure the original rusty bumper hex bolts they seem about 2 millimeters shorter than 30mm - but perhaps bumper hex bolt measurements do not need to be extremely accurate?
(Apparently the "bumper" is also referred to as the "Impact Bar" - which helps to know when searching online). Several websites are showing that the bumper hex bolt size is: 1.25 x 30 mm

M8x1.25x30 Multi-Purpose Bolt - GM (11515758)

Here's 1 example:
https://www.gmpartscenter.net/oem-pa...-bolt-11515758

I'm considering purchasing these stainless steel HEX body bolts on Amazon since I live in an area where metal rusts easily.
M8-1.25x30 MM DIN 933 Metric Stainless A2 70 HEX Head Bolt/Screw,/933 (Quantity: 100) Size: M8-1.25 | Length: 30mm

Material: Stainless Steel
Grade Rating: Grade 8 8
Thread Size: m8-1.25
Exterior Finish: Unfinished
Manufacturer Grade: Grade 8 8
Quantity: 100

But before I order them, I hope to find out if this is the correct HEX bolt size for my 1997 Chevy Blazer LS 2-door 2-wheel drive truck?

Amazon

Amazon

Thanks!

M8-1.25x30 MM DIN 933 Metric Stainless A2 70 HEX Head Bolt / Screw / 933 (Quantity: 100) Size: M8-1.25 | Length: 30mm - Stainless Steel.

I am also adding 3 photos of the existing rusty original HEX bolts from the front bumper:

Original (now rusty) HEX bolt from the front bumper of my 1997 Chevy Blazer LS 2-door, 2WD, 4.3 liter V6.

Original (now rusty) HEX bolt from the front bumper of my 1997 Chevy Blazer LS 2-door, 2WD, 4.3 liter V6.

Original (now rusty) HEX bolt from the front bumper of my 1997 Chevy Blazer LS 2-door, 2WD, 4.3 liter V6.