Searching for reliable M8 x 1.25 bolts? This guide highlights five top-rated assortments and individual bolts to help you choose components that balance strength, corrosion resistance, and ease of use. Each entry includes key features, typical applications, and practical considerations to match common DIY, automotive, and electronics projects. Read on to compare selections and find the best fit for your needs.
| Product | Thread Size | Length Variants | Material |
|---|---|---|---|
| 80Pcs M8 x 1.25 Bolt Assortment (ZTF) | M8 x 1.25 | 30–70 mm | 12.9 Grade Alloy Steel |
| Joamang M8 x 100mm Hex Bolts | M8 x 1.25 | 100 mm | 12.9 Grade Alloy Steel |
| Yinpecly M8 Hex Bolts 20mm | M8 x 1.25 | 20 mm | 304 Stainless Steel |
| Mywish M8x1.25 Bolt 35mm | M8 x 1.25 | 35 mm | 304 Stainless Steel |
| Joamang M8 x 45mm Hex Bolts | M8 x 1.25 | 45 mm | 8.8 Grade Alloy Steel |
80Pcs M8 x 1.25 Bolt Assortment Kit
The ZTF 80-piece assortment covers common M8 x 1.25 sizes, including 30 mm, 40 mm, 50 mm, 60 mm, and 70 mm hex bolts. The kit includes corresponding nuts and flat and lock washers to support quick hardware assembly. Made from 12.9-grade alloy steel, these fasteners emphasize high strength and rigidity for demanding mechanical tasks. The kit aligns with standardized DIN 933 specifications, reducing tolerance-related issues and ensuring repeatable installations. The included washers help distribute load and protect mating surfaces, which is beneficial for furniture assembly, light automation projects, and hobby machining. Users should handle the kit with standard hand tools for best engagement and to avoid over-tightening that could strip threads. The assortment is designed for versatility, delivering a broad range of lengths in a single purchase to minimize search time. This makes it suitable for garage projects, bike racks, and modular shelving where multiple bolt lengths are needed.
Key features and considerations:
– Wide length range (30–70 mm) for many applications
– 12.9-grade alloy steel offers strong performance and rust resistance
– Includes washers and nuts for complete fastening sets
– DIN 933 standard compliance supports compatibility
– Basic corrosion resistance; consider additional coating if used in marine environments
Joamang M8 x 100mm Hex Bolts, 8Pcs
The Joamang set features 8 stainless-grade 12.9 alloy steel hex bolts, each 100 mm long with M8 x 1.25 threading. A black oxide finish provides additional corrosion resistance and a subdued appearance. These bolts are well-suited for household appliances, automotive projects, furniture assembly, and light machinery where longer, fully threaded fasteners are advantageous. With precision threading and a robust hex head, installation is straightforward using standard wrenches or sockets. The full length engagement helps ensure strong clamping in assemblies with thicker materials. While suitable for a wide range of tasks, avoid using these bolts in heavy structural applications where engineering-grade fasteners are required.
Key features and considerations:
– 100 mm length accommodates deeper mounting holes
– Black oxide finish adds corrosion resistance and aesthetics
– Metric M8, 8 pieces with full machine thread
– Applicable across DIY projects, electronics enclosures, and automotive repairs
– Best used where long, fully threaded bolts are beneficial
Yinpecly 25 Pcs M8 Bolts, 20 mm
Yinpecly offers 25 pieces of M8 x 1.25 x 20 mm stainless hex bolts in a bright finish. Constructed from 304 stainless steel (A2-70), these bolts deliver high hardness, oxidation resistance, and corrosion resistance for use in harsh environments. The precise thread pitch and dimensions help ensure a secure fit and minimize slippage during assembly. The 20 mm length suits light-duty projects such as furniture assembly, cabinetry, electronics mounting, and compact mechanical assemblies where shorter fasteners reduce protrusion. As with all stainless hardware, ensure compatible coatings and head styles for the intended tools and aesthetics.
Key features and considerations:
– 304 stainless steel for superior corrosion resistance
– Precise M8 x 1.25 threading
– Suitable for indoor and some outdoor projects
– Compact length suitable for thin chassis or panel mounting
– Bright finish provides easy inspection and clean appearance
Mywish M8x1.25 Bolt, 35mm
The Mywish 35 mm M8 bolts are made from 304 stainless steel, with a black oxide finish option and a hex socket head. Every set contains 20 pieces designed for furniture assembly and outdoor use. The full-thread design offers uniform engagement along the entire bolt length, which is helpful for joining thin panels or creating secure clamps. While suitable for many wooden and light-metal projects, these bolts are not recommended for heavy machinery or major structural loads. The stainless construction reduces rust risk over time, though periodic inspection is advised in high-temperature or highly corrosive environments.
Key features and considerations:
– 304 stainless steel for corrosion resistance
– 35 mm length with 1.25 mm pitch
– Includes black oxide variant and hex drive
– Ideal for furniture, cabinets, and light outdoor setups
– Not intended for critical structural applications
Joamang M8 x 45mm Hex Bolts, 10Pcs
These Joamang 45 mm hex bolts combine 8.8-grade alloy steel with a black oxide finish for durability and corrosion resistance. The M8 x 1.25 threading and 45 mm length suit thicker assemblies and projects requiring deeper screw engagement. The hex head design supports strong torque transfer with common hand tools, making them versatile for appliances, electronics housing, furniture assembly, and light industrial components. Because the bolts are manufactured to standard metric specifications, they pair well with corresponding nuts and washers. This set is best for moderate-load scenarios where robust, fully threaded fasteners are needed without specialized machinery-grade requirements.
Key features and considerations:
– Grade 8.8 alloy steel meets higher strength requirements
– 45 mm length provides deeper thread engagement
– Black oxide finish enhances wear and corrosion resistance
– Appropriate for a wide range of domestic and hobby projects
– Confirm load requirements before use in structural applications
Buying Guide: Key Purchase Considerations
When selecting M8 x 1.25 bolts, consider the following to ensure you get the right fit for your project:
- Material and corrosion resistance: Stainless steel (304) offers better rust resistance in damp or outdoor environments, while alloy steel with a protective finish can provide higher strength for mechanical applications.
- Length and thread engagement: Longer bolts provide deeper engagement but risk protrusion; match bolt length to the thickness of the joined parts plus a little extra for a secure clamp.
- Strength grade: 12.9-grade alloy steel offers superior tensile strength compared to general-purpose grades. For structural or load-bearing uses, choose higher-grade fasteners and verify engineering requirements.
- Finish and appearance: Black oxide finishes reduce glare and hide wear, while bright finishes help with visual inspection. Consider the environment and tool compatibility when choosing a finish.
- Head type and drive: Hex heads are common and work with standard wrenches; consider socket-cap or button heads if flush mounting or tool access is restricted.
- Completeness of kit: Some assortments include nuts and washers, which is convenient for quick projects. Confirm that the kit contains the right nut type (e.g., full thread, lock washers) for your application.
- Application appropriateness: Avoid using standard M8 fasteners in critical structural roles without appropriate engineering validation. For furniture, electronics enclosures, and non-structural assemblies, these bolts are typically suitable.
Comparison at a glance:
– Versatility: Large assortments cover a wide range of lengths and help reduce search time on future projects.
– Longevity: Stainless variants resist rust in challenging environments; steel variants may require coatings or careful use in corrosive settings.
– Finish options: Oxide finishes offer cost-effective protection, while stainless steel provides longer lifespans in adverse conditions.
– Price-to-value: Larger kits generally offer better overall value for frequent projects; define your primary use to avoid excess purchases.