For an M8 x 20mm furniture fastener, first confirm the head style, thread pitch, and drive type your project requires. The MYWISH and SG TZH sets are flat-head socket options; VGBUY offers a larger quantity with a black zinc finish. Mriuuod is a conventional hex-head alternative, while the 48-piece assortment includes several lengths. These products may not all match every JCBB specification, so compare their dimensions with your existing fastener or project plans before ordering.
| Product | Best For | Key Difference |
|---|---|---|
| MYWISH M8 x 20mm set | Furniture assembly | 304 stainless steel; 20 pieces |
| SG TZH M8 x 20mm set | Home and shop repairs | 18-8 stainless steel; 20 pieces |
| VGBUY M8 x 20mm set | More fasteners in one pack | 33 pieces; black zinc plated |
| Mriuuod M8 x 20mm hex bolts | Projects needing a hex head | Carbon steel; storage case |
| 48-piece M8 assortment | Multiple-length projects | Four lengths and matching nuts |
MYWISH M8 x 20mm Flat-Head Screws
Best for: Furniture assembly and woodworking where a flat-head socket screw with M8 dimensions is the needed style. This set contains 20 full-thread screws made from 304 stainless steel and includes a hex spanner. Listed dimensions are an 8mm thread diameter, 20mm length, 1.25mm pitch, 14.1mm head diameter, and 5mm hex drive.
The product is selected for its clearly listed measurements and intended furniture uses, including beds, tables, cabinets, and chairs. The manufacturer also describes it for woodworking and outdoor use.
Limitation: The listing says it is not recommended for large machinery or structural use. Confirm that the flat-head form matches the JCBB fastener you are replacing.
SG TZH 304 Stainless M8 Screws
Best for: Small household, office, garage, or shop repairs that call for a 20mm flat-head socket fastener. The 20-piece set uses 18-8 (304) stainless steel, has full threads, and includes a hex spanner. Its stated thread pitch is 1.25mm, and the listed head diameter is 13.9mm.
Choose this option if you want a 304 stainless set with dimensions close to the MYWISH option and applications that include appliances, communications equipment, furniture, and small repairs. It is a useful comparison when head diameter matters to the fit.
Limitation: The supplied product details do not specify the hex-drive size. Check the listing and required tool before buying.
VGBUY 33-Piece M8 Screw Set
Best for: Buyers who need more M8 x 20mm fasteners in one package. This set includes 33 M8-1.25 x 20mm screws and an M8 hex spanner. The screws are described as 304 stainless steel with additional black zinc plating, full threads, and a socket drive.
The higher piece count makes this a practical choice for repeat assembly or keeping spare fasteners on hand. The product description also notes clear threads and a smooth surface, features relevant when selecting a fastener for repeated installation.
Limitation: The listing does not provide head dimensions or the drive size in the supplied details. Verify those measurements if the screw must sit flush or fit a particular recess.
Mriuuod M8 Carbon Steel Hex Bolts
Best for: Projects that need a standard hex-head bolt rather than a flat-head socket screw. The 20-piece set has M8-1.25 threads, a 20mm rod length, and a black oxide finish. It is made from carbon steel, and the supplied details list a 13mm hex-head width and 5.5mm head thickness.
This product is included as a head-style alternative, not as a direct match for every JCBB screw. Its transparent storage case may help keep the fasteners organized between jobs.
Limitation: Carbon steel is a different material from the stainless steel options above. Avoid choosing it solely by length if your application requires a specific material or recessed head.
M8 Button-Head Screw Assortment
Best for: Buyers who need M8 fasteners in several lengths instead of only 20mm. The 48-piece assortment includes 10mm, 20mm, 30mm, and 40mm button-head socket screws, along with matching hex nuts. The screws are listed as Grade 10.9 alloy steel with a black oxide finish, M8 thread diameter, 1.25mm pitch, and 5mm Allen drive.
Choose this kit when the required length may vary across a project. Its 20mm option can suit a length requirement, while the other sizes provide alternatives for different material thicknesses.
Limitation: Button-head screws are not the same head style as flat-head or conventional JCBB fasteners. The assortment also contains multiple lengths, not 48 screws of one size.
Buying Guide: How To Choose M8 x 20mm Screws
Does M8 x 20mm describe the whole fastener?
M8 identifies a nominal thread diameter of 8mm, while 20mm generally describes the screw length. Check how length is measured for the specific head style, especially when comparing flat-head, button-head, and hex-head products. A screw with the right length can still be wrong if its head will not fit the recess or surface.
Why does thread pitch matter?
The listed products mostly specify a 1.25mm pitch. Match the pitch as well as the diameter when replacing a screw. A fastener that looks similar may not thread correctly if its pitch differs. Compare against the original screw, hardware documentation, or the threaded opening rather than forcing a mismatched fastener.
Which head and drive should I select?
Flat-head, button-head, and hex-head bolts have different profiles and seating requirements. A flat head may be chosen when the project calls for that profile; a button head has a rounded profile; a hex head uses an external wrench or socket. Also confirm the internal hex-drive size and whether the included tool fits.
Should I choose stainless steel or carbon steel?
The MYWISH, SG TZH, and VGBUY products are described as 304 or 18-8 stainless steel. The Mriuuod option is carbon steel with black oxide. Select material and finish based on the project’s requirements and exposure conditions. Do not assume that a finish or material makes an unsuitable fastener appropriate for structural use.
Frequently Asked Questions
Is an M8 x 20mm screw always compatible with a JCBB fitting?
No. Diameter and length alone do not establish compatibility. Confirm thread pitch, head shape, drive style, and the fitting’s required specifications.
What thread pitch is listed for these M8 options?
The products that state a pitch list 1.25mm. Verify the pitch of your existing screw or project before ordering.
Can I use a 20mm screw instead of a longer one?
Only if 20mm is suitable for the material thickness, threaded engagement, and head seating in your application. Measure the assembly rather than choosing by appearance.
Are all five products stainless steel?
No. MYWISH, SG TZH, and VGBUY are described as stainless steel. Mriuuod is carbon steel, and the assortment is described as Grade 10.9 alloy steel.