The Best M3X8 Screw of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best M3X8 Screw of 2025. Check our ranking below.
2,321 Reviews Scanned
Rank No. #1
100pcs M3 x 8mm 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Bolts,Black Oxide Finish
- Material: 12.9 Alloy Steel
- Metric M3 screws,Thread Length: M3 x 8mm，Thread Diameter: 3mm,
- Thread Pitch: 0.5mm, Total Length: 11 mm
- Head Diameter: 5.3mm，Head Height : 3mm
- Thread Coverage: Full Thread
Rank No. #2
950PCS M3 Screws Assortment Kit, Machine Screw Kit, M3x 6/8/12/16/20mm Screw and Washer Kits, Hex Socket Button Head Black Screws, M3 Screws for Machinery, Furniture, 3D Printing, DIY Repair
- M3 screw kit contains 950pcs, 5 sizes of screws: M3 × 6mm/8mm/12mm/16mm/20mm, 1 x Allen wrench, Each screw, nut and washer is coated with a small amount of anti-rust oil to effectively prevent rusting and extend the service life of fasteners.
- Machine screw kit can be used for various builds and fix it projects,including machinery, furniture, automotive, motorcycle maintenance, electronic products, environmental protection equipment, 3D printing equipment, communication equipment, power facilities, ship assembly, toys and DIY, etc.
- Hex socket button are made of 10.9 grade alloy steel, it features high hardness, smooth surface, no burrs, durability, environmental friendliness, and excellent corrosion resistance in harsh environments.
- Round head hexagonal design, large head contact area, more balanced force, It has better torque transmission, more stable performance, and is less likely to deform or slip during use.
- Screws assortment kit is stored in a plastic storage box, Convenient access, It has separate compartments and sturdy locks, which will not be scattered or lost.
SaleRank No. #3
mxuteuk 620PCS M3 Screws Assortment Kit,M3 Screw Kit Suitable for 3D Printer,6/8/10/12/16/20mm 12.9 Grade Alloy Steel Black Zinc Hex Socket Head Bolts Nuts Washers Kit
- Standardized Metric Sizes:The m3 socket head screws come with 6 commonly used lengths M3 x 6mm,8mm,10mm,12mm,16mm,20mm Hex Socket Head Cap Bolts Nuts Screws;Thread Dia: 3mm; Thread Pitch:0.4mm;According with standardized metric system,the average error is less than 0.01mm.
- Socket head m3 screws Made of 12.9 grade alloy steel and galvanized surface, corrosion resistance and oxidation resistance,superior rust resistance for both indoor and outdoor use Strong, sturdy performance across various applications.
- Wide Application:This m3 screw is widely used,suitable for works well for diverse projects including 3D printing,CNC machinery, electronics, RC models, and DIY repairs.This m3 screws kit has many sizes to meet all kinds of needs；
- Product packaging;30pcs×6mm;30pcs×8mm;30pcs×10mm;30pcs×12mm;30pcs×16mm;30pcs×20mm;180pcs×Nuts;80pcs×Spacers;180pcs×Lock washers,1pcs×Hex Wrench.
- The m3 metric machine screws kit store in sturdy, compartmentalized plastic container with clear size labels that keeps everything organized，Easy access design that speeds up project work.
Rank No. #4
uxcell M3x8mm 10.9 Carbon Steel Countersunk Head Hex Socket Screw Pack of 50
- Head Style: Flat Head,Countersunk Head; Material: 10.9 Carbon Steel; Package Content: 50(+/-2%)pcs x Countersunk Hex Socket Screws
- Product Name: Countersunk Hex Socket Screws; Thread Size: M3/0.12"(D); Weight: 27g
- Drive Type: Hex Socket; Main Color: Black; Thread Pitch: 0.5mm
- Total Length: 8mm/0.3"; Thread Length: 6mm/0.24"
- Hex Socket Width: 2mm/0.08"; Head Size: 6x2mm/0.24"x0.08"(D*H)
Rank No. #5
200Pcs M3 x 8mm Hex Socket Head Cap Screws Bolts, Class 12.9 Alloy Steel, Black Oxide Finish, Allen Socket Drive, Fully Threaded, with 1Pc Hex Spanner, Thread Pitch 0.5 mm
- 【Product Dimension】-- Thread Size: M3-0.5; Thread Pitch: 0.5mm; Screw Length: 8mm; Head Height: 3mm; Head Diameter: 5.5mm; Drive Size: 2.5mm.
- 【Quality Material】-- Our M3 socket head cap screws are made of high-quality 12.9 Grade alloy steel, ensuring high strength, durability, and long service life.
- 【Product Feature】--Socket head cap screws feature a hexagonal recess for tightening and loosening using an Allen wrench or hex key. This design eliminates the need for side clearance and allows screws to be placed close to other screws and assembly components.
- 【Package Includes】-- Each package includes 200Pcs(M3 x 8mm) socket head cap screws and 1Pc hex key, meeting your daily needs, and comes with a transparent plastic box for storage.
- 【Widely Application】--These small M3 screws are widely used in 3D printers, RC cars, mechanical maintenance, instrumentation, electronic products, DIY projects etc
Rank No. #6
HELIFOUNER 100 Pieces M3 x 8mm, Thread Pitch 0.5mm, 304 Stainless Steel (18-8) Button Head Socket Cap Screws, Fully Threaded
- 【Sizes】M3 x 8mm button head socket cap screws, thread length: 8mm, thread pitch: 0.5mm, thread diameter: 3mm, total 100 pieces, enough quantities can meet your daily long time using.
- 【Material】304 Stainless Steel, stainless steel material which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and excellent oxidation resistance, which can ensure long time using.
- 【Design】The head of HELIFOUNER button head socket cap screw is round, and the middle is a recessed hexagon. It is usually used with a hex wrench. Commonly used in machinery, it mainly has the advantages of easy fastening, disassembly, and not easy to slip corners.
- 【Wide Applications】Widely used in all kinds of precision machinery industry, classified instruments, instruments, electronic products, printed projects, household appliances, communication products, locks, lamps, lights, toys, etc.
- 【Package Included】 Total 100 pieces M3 x 8mm button head socket cap screws are packed in a durable transparent box. Keep away from children, whenever you need us, please free to contact us, we will give you a professional service and reply you within 24 hours.
Rank No. #7
Fgruh 750PCS M3 Screws Assortment Kit, M3x6/8/10/12/16/20/25/30 mm Hex Socket Head Bolts, Nuts & Washers Assorted Set - 12.9 Alloy Steel Black Zinc Plated M3 Screw for 3D Printer,DIY
- 【Perfect for DIY Projects】 This M3 screw 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 M3-0.5 hex socket head cap screws set come with 8 commonly used lengths—M3 x 6mm, 8mm, 10mm, 12mm, 16mm,20mm,25mm,30mm—ideal for routine installations and repairs. They meet standard metric specs, the average error is less than 0.01mm.
- 【Premium 12.9 Grade Alloy Steel】- This M3 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 loads, ideal for harsh environments.
- 【Oil-Free & Rust-Proof】 -Black zinc plating means no greasy mess—keep hands and projects clean. Superior rust resistance ensuring long life.This 3mm black allen screw set perfect for any indoor/light outdoor use.
- 【Smart Storage Box 】- The metric machine screws kit comes in a durable, compartmentalized case with clear size labels—so you can spot the right screw instantly. Keeps your workspace tidy and speeds up project progress, making every job smoother.
Rank No. #8
uxcell M3x8mm Hex Socket Button Head Cap Bolts Screws Alloy Steel 100pcs
- Product Name: Hex Socket Button Head Bolts; Material: Alloy Steel; Surface Treatment: Blackening; Performance Grade: 12.9; Color: Black; Dimension: M3 x 8mm; Rod Length(Under Head): 8mm / 0.31"; Pitch: 0.5mm / 0.02"
- Inner Hex Width: 2mm / 0.08"; Screw Head Size: 5.5 x 1.5mm / 0.22" x 0.06"(Dia.*Thickness); Package Content: 100pcs x Hex Socket Bolts
- Feature: Button head machine screws, hex socket drive. Metric machine screws for universal use.
- Material: Made of alloy steel, black oxide coating finish, wear-resistant, anti-corrosion, and it is smoother to use.
- Application: Widely used where fastening is required, the assembly and maintenance of households, machine tools, construction, and DIY projects. Such as household hardware, electrical products, mechanical equipment products, etc.
Rank No. #9
uxcell M3x8mm Stainless Steel Phillips Round Pan Head Machine Screws (Pack of 100)
- Head Style: Round Head; Material: Stainless Steel; Package Content: 100(+/-2%)pcs x Round Pan Head Phillips Screws
- Product Name: Round Pan Head Phillips Screws; Thread Size: M3x8mm/0.12"x0.3"(D*L); Weight: 54g
- Drive Type: Phillips; Fastener Type: Machine Screw
- Main Color: Silver Tone; Thread Pitch: 0.5mm
- Total Length: 10mm/0.4"; Head Size: 5x2mm/0.2"x0.08"(D*H)
Rank No. #10
Fgruh 2300PCS M3 Screws with Nuts Assortment Kit, M3x4/6/8/12/16/20/25/30/35 mm Hex Socket Button & Cap Head Bolts Nut and Washers Set, 12.9 & 10.9 Grade Black Zinc Plated for DIY, 3D Printer
- 【Hex Socket Button & Cap Head】- The metric M3 screws set comes with 2300 pieces, including 286pcs M3-0.5 x 4mm/6mm/8mm/12mm/16mm/20mm/25mm/30mm/35mm hex socket head cap bolts. 286pcs M3-0.5 x 4mm/6mm/8mm/12mm/16mm/20mm/25mm/30mm/35mm hex socket button head bolts, 576pcs M3 nuts, 576pcs flat washers and 576pcs spring washers.Perfect size for 3D printing DIY.
- 【Perfect for DIY Projects】 This m3 small screws assortment kit are ideal for hobbyists working with 3D printing, electronics, RC models, RC car enthusiasts, DIY, chair replacement and CNC machinery, offering precision for intricate designs.
- 【High Quality】- These 3m screws assorted kit are crafted from high-strength 10.9 &12.9 grade alloy steel and black zinc plated, ensuring exceptional durability and load-bearing capacity. High-strength steel resists wear, corrosion, and heavy loads, perfect for any indoor/light outdoor use.
- 【Wide Applications】Keep a m3 machine screw variety set at hand. Whether you are working on DIY projects, bicycle repairs, or professional construction, it can meet your needs at any time, making your work more convenient and efficient.
- 【Organized Storage Box 】- The m3 hardware kit comes in a compartmentalized case with clear labels for quick access to bolts, washers, and nuts. Keeps your workspace tidy and speeds up project progress, making every job smoother.
Last update on 2026-01-02 / Affiliate links / Images from Amazon Product Advertising API
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