VIGRUE 521PCS Metric Flange Bolts Kit M6 M8 M10 - Handy Assortment

In this review of the VIGRUE 521PCS flange bolts assortment, the bottom line is straightforward: this kit is for DIYers, mechanics, and small shops who need a ready set of metric serrated flange bolts, matching flange nuts and washers for automotive and general fastening tasks. The single biggest reason to buy is the matched, organized selection of 169 serrated flange bolts with 176 flange nuts and 176 flat washers in a compact, protected case, which saves time hunting for the right size when repairing or replacing fasteners.

Key Features

• Comprehensive kit: The 521PCS set contains bolts, nuts and washers in matching counts so you can complete assemblies without hunting for loose parts.
• Wide size range: Includes 16 common metric sizes across M6, M8 and M10, giving options for light automotive work and household repairs.
• Serrated flange design: Serrated flanges bite into mating surfaces to reduce loosening from vibration, useful on engine and chassis fittings.
• Material strength: Made from grade 8.8 alloy steel for higher hardness and improved corrosion and chemical resistance compared with plain mild steel.
• Part and fully threaded options: The mix of partial and full thread bolts covers applications needing shear strength or long engagement length.
• Protective packaging: Triple protection with a thickened case plus foam and kraft paper reduces the chance of damaged or mixed parts in transit.

Who It's For

This set is aimed at home mechanics, hobbyists and small workshops that work on cars, motorcycles and machinery where metric fasteners are required. The inclusion of M6, M8 and M10 sizes and matched nuts and washers makes it particularly useful for routine maintenance and replacing stripped or lost bolts.

People who need specialty or very high grade fasteners for critical structural or aerospace applications should look elsewhere; this kit is a practical, economical assortment rather than a certified fastener pack for regulated industries.

Pros & Cons

Pros

• Well matched bolt, nut and washer counts mean fewer trips to the hardware store when completing assemblies.
• Serrated flange heads provide better resistance to loosening in vibrating environments.
• Grade 8.8 alloy steel construction offers good hardness and corrosion resistance for general use.

Cons

• Not intended as a replacement for application-specific certified fasteners; buyers needing traceable or specialty coatings may require other sources.

Specifications

Kit quantity	521 pieces (169 bolts, 176 nuts, 176 washers)
Bolt sizes included	M6, M8, M10 across 16 length variants
Representative bolt lengths	M6 x 12/16/20/25/30mm; M8 x 16/20/25/30/35/40mm; M10 x 20/25/30/35/40mm
Bolt standard	Metric flanged hex bolts (DIN6921 style), serrated flange
Material grade	Alloy steel grade 8.8
Thread types	Partially and fully threaded bolts included
Packaging	Thickened case with foam and kraft paper protection

Our Verdict

The VIGRUE 521PCS metric flange bolts kit is a practical, value-packed assortment for anyone who regularly works on metric fastenings and wants matched bolts, nuts and washers at hand. It combines useful size coverage, serrated flange heads for anti-loosening and grade 8.8 strength in an organized, protective case, making it a sensible purchase for DIY repairs and light workshop use.

Frequently Asked Questions

Are the bolts and nuts matched for size?
Yes, the kit includes matched counts of serrated flange bolts with corresponding flange nuts and flat washers to complete assemblies.

What material and strength are the fasteners?
The components are made from alloy steel rated at grade 8.8, offering higher hardness and improved corrosion resistance for general use.

Is the set suitable for automotive repairs?
Yes, customers report it is useful for replacing stripped or lost automotive bolts and for common Honda repairs, though it is not a substitute for application-certified fasteners.