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Selecting the correct fasteners is crucial for the success and longevity of any project, whether it's a DIY home repair or a professional construction job. The right bolt ensures structural integrity, prevents premature wear, and guarantees safety. This guide will help you navigate the options to find the ideal bolt for your specific needs.
Package: You will receive 680pcs bolts and nuts Assortment kit，including 13 sizes screws，4 sizes nuts，4 sizes flat washers and 4 sizes lock washers，meet your needs in daily life
Material: Our Screws Bolts and Nuts Assortment kit is crafted from premium carbon steel, ensuring exceptional corrosion resistance, rust-proof qualities, and oxidation protection for long-lasting durability
Precision Engineering: Experience the difference with our meticulously crafted bolts and nuts kit; the smooth, clean threads ensure precision and ease of use while the tightly rolled threads resist deformation and slipping during application
Convenient Storage: M3, M4, M5, and M6 screws, bolts, nuts, and washers are neatly organized in a plastic storage box, making it exceptionally easy to store, access, and transport wherever you need your nuts and bolts machine screws
Nuts and Bolts Assortment Kit: This nuts and bolts assortment kit features round head machine screws with matching hex nuts and flat washers, made from solid metal material with smooth edges. The finish helps provide basic protection against rust and...
Bolts and Nuts Kit with Wide Applications: This bolts and nuts kit and nut and bolt assortment works well for a range of tasks, including machinery, precision instruments, household appliances, communication products, locks, lamps, lights, toys...
Nuts and Bolts Organizer Case: All pieces in this nuts and bolts organizer are neatly stored in a clear plastic case with separate compartments, making it easy to find the right bolt assortment kit or machine screw assortment kit when needed
Metric Bolt Assortment & Washers: The metric bolt assortment and assorted bolts nuts and washers kit includes a practical selection of washers for screws, assorted nuts and bolts, and bolts and nuts in M4, M5, M6 sizes, suitable for various home...
【Perfect for DIY Projects】 This M6 screws assortment kit are ideal for hobbyists working with 3D printing, electronics, RC models, DIY repairs, chair replacement and CNC machinery, offering precision for intricate designs.
【Standardized Metric Sizes】 The M6 hex socket head bolts assortment kit come with 8 commonly used lengths—M6-1.0 x 8mm, 10mm, 12mm, 16mm,20mm,25mm,30mm,35mm,with a total of 185 pieces.M6 bolt pitch 1.0 mm—ideal for routine installations and...
【Premium 12.9 Grade Alloy Steel】- This M6 bolts, nuts and washers assorted kit are crafted from high-strength 12.9 grade alloy steel, ensuring exceptional durability and load-bearing capacity. High-strength steel resists wear, corrosion, and heavy...
【Oil-Free & Rust-Proof】 - Black zinc plating means no greasy mess—keep hands and projects clean. Superior rust resistance ensuring long life.This 6mm metric allen head cap screws set perfect for any indoor/outdoor use.
Strong Carriage Bolts: Carriage bolt is dome head bolt fastener with a locking neck style, which prevents turning when the nut it tightened or removed. Can be used in wood, metal applications
Stainless Carriage Bolts: Our 304 stainless steel carriage bolts 5/16 are of excellent corrosion resistance and durability. These carriage bolts 5/16 x 2 are ideal for both indoor and outdoor use
Well Made Carriage Bolts 2 Inch: All of the stainless steel bolts and hex nuts and flat washers are well manufactured with no burs, smooth-symmetrical head, precise and clean threads
Complete Bolts Nuts Washers Kit: You will get 12pcs 5/16-18 x 2" carriage bolts, 12pcs 5/16-18 hex nuts, 12pcs 5/16" ID flat washers in one package. Standard size, the bolt conforms to ASME B 18.5
Premium Material: Our mixed round head cross head screws and nuts and flat washers are made of outstanding metal material with smooth edges, which offers good corrosion resistance, rust resistance, and oxidation resistance, ensure long time using.
Easy to Use: These assorted nuts and bolts and washers sets are easy to use. Our screw thread is smooth, clean, and accurate. And the compact thread is not easy to out of shape and slid in the process of rolling.
Easy to Store: All M3 M4 M5 M6 cross pan head machine screws and bolts and nuts and washers are stored in a separate girds plastic storage box, easy to store, use, carry, and get it, perfect to replace broken and missing screws.
Wide Applications: This package includes a variety of popular sizes of screws, nuts, and washers, commonly used in machinery, furniture, car, motorcycle repair, environmental protection equipment, 3D printing equipment, communication equipment, power...
【Metric Flange Bolt Assortment】This is nice selection of metric flange head bolts of the most common lengths along with the nuts and washers, Including M6-1.0 x 12/16/20/25/30mm, M8-1.25 x 16/20/25/30mm, M10-1.5 x30mm, 280pcs in total. The fully...
【10.9 Alloy and Black Galvanized】This flange bolt kit is crafted from 10.9 grade alloy steel with a durable black galvanized finish. If you're working inside the engine, you'll need high-strength Class 10.9 bolts on hand. Class 8.8 bolts are not rated...
【Time & Money Saver】Great bins for storage with a size chart on the inside and outside. Compared to the time it takes to go to a hardware store and the cost of buying individual packs, this flange bolts nuts washers kit is a time and money saver.
【Wide Applications】The flange has serrations grip that increases the torque needed to loosen the bolt, which is perfect for mounting something that exposed to vibrations and harshness during action. Widely used in home improvement, automotive projects...
SECURE AND RELIABLE - The round head and square neck design of carriage bolts ensure a secure fit in square holes. When used with 1/4 hex nuts and flat washers, they provide reliable and stable fastening. Carriage bolts have a dome head and locking neck...
RUGGED AND DURABLE - EASTPUK carriage bolts are made of quality 18-8 (304) Stainless Steel, offering better corrosion resistance and rust protection compared to standard screws. Carriage bolts 1/4 are long-lasting and less prone to damage, and are...
VALUE PACKAGING AND EASY TO USE - The bolt kit contains 20pcs 1/4 carriage bolts + 20pcs stainless washers + 20pcs hex nuts, designed to stay secure during installation and sink quickly and easily. They are ideal for use at home, in the office, or at...
【4 Sizes Metric Screw Assortment Kit】This 2640pcs screws set includes M2-0.4, M3-0.5, M4-0.7, M5-0.8 sizes with precise thread diameters (2mm/3mm/4mm/5mm). Lenths of the thread M2x4mm/8mm/12mm/16mm. M3x4mm/8mm/12mm/16mm. M4x6mm/8mm/12mm/16mm...
【High quality】– Made of durable 10.9 grade alloy steel metric bolts, nuts and washers assorted kit with oil-free black galvanizing for corrosion resistance. Smooth, burr-free surface with precise threading ensures secure fastening. Weatherproof...
【Organized & Portable】The hex socket button head bolt assortment sets are neatly packed in a sturdy plastic storage box, ensuring easy organization and quick access. The metric machine assortment kit includes M2 M3 M4 M5 sizes for convenient...
【Wide Applications】Keep a set of commonly used small screw hardware kit at hand. Whether you are working on DIY projects, small projects repair, or professional construction, it can meet your needs at any time, making your work more convenient and...
Full Thread Design: The threading of these tap hex bolts provides continuous engagement for secure fastening in tapped holes and joints—ideal for lighter-duty applications requiring adjustability
A307 Grade Strength: Manufactured to ASTM A307 standards, these hex head bolts offer reliable performance for general-purpose, low- to medium-strength fastening needs
Zinc Plated Finish: The durable coating of these steel bolts delivers corrosion resistance and a clean, bright appearance—perfect for indoor and light outdoor environments
Hex Head Configuration: The hex head of these bolts enables easy installation with standard wrenches or sockets, ensuring consistent torque application
5/16-18 Hexagon Bolt Kit: BNUOK 5/16-18 x 2 Inch bolts with Lock Nuts,Flat & Lock Washers Head Diameter,with bright finish,clean & smooth thread and no burrs,This Hexagon bolts makes your project look more professional which are favoured for heavy-duty...
304 Stainless Steel:This lock nuts and bolts, washers are 100% made of high quality 304 stainless steel, which has superior anti-rust and abrasion resistance.Bolts hex head is not easy to strip,better torque transmission but also more stable...
Details:Thread Diameter: 5/16"; Thread Pitch: 1/18"; Screw Length: 2". Head Diameter: 0.5",Meet ASME B 18.2.1 specifications.
Widely Use:This stainless steel 5/16 hex bolt sets are fit for precision mechanical and industrial applications,household appliances,engines,automotive part,motorcycle accessories repairs and small repairs such as door handles,lamps,locks.
Last update on 2026-10-16 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Bolts
Comparison Tips
When comparing, consider the intended load and environmental exposure. For structural applications, prioritize high tensile strength and appropriate materials like hardened steel. For outdoor projects, stainless steel or galvanized bolts are essential to prevent rust. If appearance is a factor, look for decorative head styles or materials like brass. Always double-check thread compatibility and ensure the bolt length is suitable for the combined thickness of the materials being joined.
Frequently Asked Questions
What is the difference between a bolt and a screw?
While often used interchangeably, bolts are typically used with a nut to fasten two or more parts together. Screws are generally designed to be driven into a material, creating their own threads or engaging with pre-existing ones.
How do I determine the correct bolt size?
Bolt size is determined by its diameter, length, and thread pitch. Measure the diameter of the hole or the existing fastener, determine the required length to pass through all materials and accommodate a nut, and ensure the thread pitch matches the nut or tapped hole.
When should I use stainless steel bolts?
Stainless steel bolts are recommended for applications exposed to moisture, salt, or corrosive chemicals. They offer excellent resistance to rust and corrosion, making them ideal for outdoor furniture, marine environments, and areas prone to humidity.
What does 'grade' mean for bolts?
Bolt grade indicates its strength and load-bearing capacity. Higher grades, often denoted by numbers and markings on the head (like 2, 5, 8), signify greater tensile strength and are suitable for heavier-duty applications.
How do I prevent bolts from loosening?
Loosening can be prevented using methods like lock washers, lock nuts, thread-locking adhesives, or by using bolts with specific locking features. The choice depends on the application's vibration levels and required security.
Are galvanized bolts suitable for outdoor use?
Yes, galvanized bolts are coated with a layer of zinc to provide corrosion resistance, making them suitable for many outdoor applications. However, for highly corrosive environments, stainless steel may offer superior protection.
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