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5 Best Socket Cap Screws of 2025

Last Updated - 2025/09/21

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Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Senyard

SENYARD M6 M5 M4 M3 Stainless Steel Nuts and Bolts Assortment Kit, Metric Screw Assortment（with Lock&Flat washers・Wrenches・Self Tapping Screws） 890pcs Hex Socket Head Cap Screws Assortment Set Kit

Senyard

CA$32.50

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Main highlights
- 【Metric screws - Package】1. Screw sorting box Wrop in bubble film; 2. Then wrap into a special screw outer box; 3. Put it into the Amazon packaging box; 4. Three layers of protection, so that the exquisite products can be delivered to your hands intact.
- 【Metric bolt kit - 2-year warranty】Our products have undergone several quality checks and many tests and come with a 2-year warranty! If you need assistance, please contact us by email or Q&A. Money back or exchange. Accept Customization.Satisfaction guaranteed.
- 【Metric Screw Assortment】If you have a set that can handle household screws. Contains 890 pcs metric screws/bolts, nuts and lock&flat washers，4*10mm & 4*20mm self tapping screws. Includes 8mm 12mm 16mm 20mm M3 M4 M5 M6 metric bolts assortment.
- 【Metric Bolts and Nuts Kit - Wide Application】 Widely used in bicycle, furniture, car license plate, automobile, electrical connections on the power source of household and commercial appliances, and other places of indoor or outdoor.
- 【Bolts and nuts kit - High quality】Made of high quality 304 Stainless Steel, This product has passed the international stainless steel inspection.No rust for 50+ years，Passivated Surface，reinforced rust resistance, please feel free to use it in humid and high temperature environments.
CA$32.50
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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Besitu

Besitu 1600Pcs M3 Screw Kit, 12.9 Grade Alloy Steel Hex Socket Button & Cap Head Metric Screw Assortment M3 Bolts and Nuts Washers Kit Black Small Machine Screw Set for 3D Printing

Besitu

CA$29.99

More Details
Main highlights
- 【Wide Applications】This screw bolt and nut kit has everything you need to screw anything together, from furniture to electronics. They will get the job done for 3D prints and laser cut items no sweat. Also Must have for robot builders, allowing for precise jig setup and product centering.
- 【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 single metric screws, this machine screw assortment is a time and money saver.
- 【Organized Package Box】With a total of 1600 pieces, this M3 screw kit offers a sufficient quantity of screws nuts washers to support multiple projects. The organized packaging makes it easy to locate and access the specific m3 screws you require, saving you time and improving efficiency during work.
- 【Hex Socket Button & Cap Head】280pcs M3 x 5/6/8/10/12/16/20/25/30mm hex socket head cap screws, 250pcs M3 x 6/8/10/12/16/20/25/30/35mm hex socket button head screws, 535pcs M3 nuts and 535pcs flat washers, 1600 pieces in total. Perfect size for assembling 3d printed items.
- 【12.9 Alloy and Zinc Plated】The m3 metric screw is made of 12.9 grade alloy steel, and zinc coated are designed for no corrosion with no oil face. All screws are machined very cleanly and have a quality finish on them.
CA$29.99
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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

HVAKHVA

HVAKHVA 1160 pcs M3/M4/M5/M6 Metric Hex Head Socket Cap Bolt & Nut Assortment, 304 Stainless Steel Machine Screws with Flat & Lock Washers,Length 6 to 35 mm

HVAKHVA

CA$23.99

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Main highlights
- 5.Wide useage ,HVAKHVA Nut and Bolt Assortment Can Be Widely Used in furniture, car, motorcycle repair, 3D printing equipment,power facilities, DIY inventions,office appliances and more
- 4.What you can get? The screw & Bolt assortment kit include M3 Bolt 120 pcs;Nuts 130 pcs;Flat & lock wahsers 300 pcs; M4 Bolt 80 pcs,Nuts 80 pcs, Flat & lock wahsers 200 pcs；M5 Bolt 43 pcs, Nuts 44 pcs, Flat & lock wahsers 90 pcs; M6 Bolt 16pcs,Nuts17 pcs, Flat & lock wahsers 40 pcs
- 3.Quality& Technology,HVAKHVA are speclized in fasten area for many years, and this hex socket Head bolt have threaded in the head which make it more easy to use
- 2. Various Sizes,This nice screws set have M3,M4,M5,M6 models , besides each model have different length ( 6 to 35 mm ) to choose,which can meet most demands in daily.M3 ,6/8/10/12mm ;M4 ,8/10/16/20mm ;M5 ,10/ 16/20/30 mm;M6 ,16/25/35 mm
- 1.Premium 304 SUS Material,Our Hex Socket Head bolt & nuts set is made by high quality 304 SUS, which have superior rust resistance and excellent oxidation resistance, can ensure long time workable and useful
CA$23.99
4
Best Value
38% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Besitu
38% Off

Besitu 1760pcs M2 M3 M4 M5 Metric Screw Assortment, Grade 12.9 Alloy Steel Hex Socket Head Cap Metric Bolts and Nuts Kit, Black Zinc Plated Metric Screw Set with 4 pcs Hex Wrenches

Besitu

CA$28.99

CA$46.99
(38% Off)

More Details
Main highlights
- 【WIDE APPLICATIONS】Good assortment to have on hand for 3D printing DIY, RC hobbies, furniture, car repair and bike stand etc. Perfect gift for DIYer.
- 【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 single metric screws, this metric screw assortment is a time and money saver.
- 【REUSABLE CONTAINER】Everything is sorted in separate compartments that are labeled, which is nice when you're looking for a specific size. You can also reuse the plastic container after you've used all the metric bolt and nut set.
- 【1760PCS METRIC SCREW ASSORTMENT】4 sizes of metric screws M2 M3 M4 M5. M2 screws: bolt length: 4mm, 6mm, 10mm, 12mm. M3 screws: bolt length: 6mm, 8mm, 12mm, 16mm. M4 screws: bolt length: 8mm, 12mm, 16mm, 20mm. M5 screws: bolt length: 12mm, 16mm, 20mm, 25mm, meet our all demands. 4 pcs customized hex wrenches for each size are provided in the kit to make the screws easier to use.
- 【12.9 ALLOY AND ZINC PLATED】The hardware is made of 12.9 grade alloy steel and zinc coated are designed for no corrosion with no oil face. Threads are clean and well cut. Nut fit snugly without excess movement. Washers are correctly sized for engagement.
CA$28.99
CA$46.99 (38% Off)
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Cicidorai

Cicidorai M6 x 20mm 25mm 30mm 35mm 40mm Socket Head Cap Screws Bolts 304 Stainless Steel Machine Metric Screw, Metric Allen Hex Drive, Fully Threaded, Bright Finish, Assortment Kit, 50PCS

Cicidorai

CA$17.79

More Details
Main highlights
- 【WIDE APPLICATIONS】：M6 Socket Head Cap Screws can provide a wide range of uses for professionals, amateurs, landlords, repairers and other DIY.
- 【THREAD DIAMETER】:6mm; Thread Length: 20mm, 25mm, 30mm, 35mm, 40mm; Pitch Size: 1.0mm.
- 【PACKAGE INCLUDEA】:M6x20mm(10Pcs), M6x25mm(10Pcs), M6x30mm(10Pcs), M6x35mm(10Pcs), M6x40mm(10Pcs).A total of five different sizes can meet your different needs.
- 【HIGH QUALITY MATERIAL】:Made of high quality 304 stainless steel.They have a high degree of oxidation resistance, rust resistance and corrosion resistance, which can ensure long-term use.
- 【HEAD DIAMETER】:10mm; Head Height: 6mm; Drive Type: Allen Hex Socket 5mm; Color: Silver Tone.Meet the standard metric system.
CA$17.79

5 Best Socket Cap Screws of 2025

SENYARD M6 M5 M4 M3 Stainless Steel Nuts and Bolts Assortment Kit, Metric Screw Assortment（with Lock&Flat washers・Wrenches・Self Tapping Screws） 890pcs Hex Socket Head Cap Screws Assortment Set Kit

Besitu 1600Pcs M3 Screw Kit, 12.9 Grade Alloy Steel Hex Socket Button & Cap Head Metric Screw Assortment M3 Bolts and Nuts Washers Kit Black Small Machine Screw Set for 3D Printing

HVAKHVA 1160 pcs M3/M4/M5/M6 Metric Hex Head Socket Cap Bolt & Nut Assortment, 304 Stainless Steel Machine Screws with Flat & Lock Washers,Length 6 to 35 mm

Besitu 1760pcs M2 M3 M4 M5 Metric Screw Assortment, Grade 12.9 Alloy Steel Hex Socket Head Cap Metric Bolts and Nuts Kit, Black Zinc Plated Metric Screw Set with 4 pcs Hex Wrenches

Cicidorai M6 x 20mm 25mm 30mm 35mm 40mm Socket Head Cap Screws Bolts 304 Stainless Steel Machine Metric Screw, Metric Allen Hex Drive, Fully Threaded, Bright Finish, Assortment Kit, 50PCS

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