Skip to main content
Home / Connectors and Fasteners / 304 Stainless Steel Cup Head Cylinder Head Hex Socket Screws, Bolts M2 M3 M4 M5 M6 M8 M10 M12 M16-M20

Attributes

Brand -
Category Industrial Small Parts / Connectors and Fasteners
Origin -
Material 304 Stainless Steel
Head Style Socket Cap Head
Drive Type Internal Hexagon
Thread Standard Metric ISO
Strength Grade A2-70
Surface Finish Plain Polished
Available Sizes M2, M3, M4, M5, M6, M8, M10, M12, M16, M20
Corrosion Resistance High
Application Machinery, Furniture, Automotive
Package Type Secure Plastic Box

5 reviews

A

Anonymous

Apr 19, 2026

Rating: 5/5

Fast shipping

Arrived earlier than expected. The packaging kept all the sizes organized. Will buy again for future automotive repairs.

A

Anonymous

Apr 06, 2026

Rating: 5/5

Perfect for my CNC project

These screws fit perfectly into my machine parts. The hex socket is deep enough for good torque without stripping. Highly recommend for precision work.

A

Anonymous

Mar 28, 2026

Rating: 5/5

Exactly as described

Used for furniture assembly. The head sits flush and looks professional. Great assortment of sizes available in the store.

A

Anonymous

Mar 27, 2026

Rating: 4/5

Good value

Threads are clean and consistent. The only reason for 4 stars is that the plastic box arrived slightly cracked, but the screws inside were fine.

A

Anonymous

Feb 22, 2026

Rating: 5/5

High quality steel

I used these for an outdoor garden structure. No signs of rust after three months of exposure to rain. The 304 stainless steel is genuine.

5 FAQ

Q: Is this material magnetic?

A: 304 Stainless Steel is generally non-magnetic, though slight magnetism may occur due to cold working during threading.

Q: Can I use these in a marine environment?

A: Yes, 304 stainless steel offers good corrosion resistance, but 316 grade is recommended for prolonged direct saltwater exposure.

Q: What is the hardness rating?

A: These fasteners comply with the A2-70 strength class, suitable for most general industrial applications.

Q: Do you sell sizes larger than M20?

A: Currently, this listing supports sizes up to M20. Please contact us for custom bulk orders regarding larger sizes.

Q: What tool do I need to install these screws?

A: You will need a metric Allen key or hex driver matching the specific screw size purchased.

Explore your interests

All Categories
Best Seller (30)
New List (30)
F01RB0WA23 Transmission Valve for Roewe DQCT280 Remanufactured

F01RB0WA23 Transmission Valve for Roewe DQCT280 Remanufactured

$324.00

Full Payment Pre-order Guzi Bear DMMD Dramatical Murder Badge Polaroid Set Merchandise

Full Payment Pre-order Guzi Bear DMMD Dramatical Murder Badge Polaroid Set Merchandise

$29.00

Peach Wood Sheepskin Rattle and Clapper Brass Traditional Handmade Baby Teething Hand Drum Newborn Gift Box

Peach Wood Sheepskin Rattle and Clapper Brass Traditional Handmade Baby Teething Hand Drum Newborn Gift Box

$29.90

Pirelli Run-Flat Tires 235/245/255/265/275/285 40 45 50 55R19R20R21

Pirelli Run-Flat Tires 235/245/255/265/275/285 40 45 50 55R19R20R21

$350.00

Protective Case Lid for Pelican Cases - Laptop Insert for Models 1510, 1560, and 1535

Protective Case Lid for Pelican Cases - Laptop Insert for Models 1510, 1560, and 1535

$254.00

Universal 5800 Super Glue for Plastic, Metal, Glass, and Wood, 10-Second Fast Curing

Universal 5800 Super Glue for Plastic, Metal, Glass, and Wood, 10-Second Fast Curing

$2.01

White Noise Wood Chip Core Grid Scented Candle Wooden Core S-Type Brand Name Candle Container Soy Candle Core Wood

White Noise Wood Chip Core Grid Scented Candle Wooden Core S-Type Brand Name Candle Container Soy Candle Core Wood

$1.50

Zunjue 100% Cotton Paper Block 300g Watercolor Paper, Fine/Medium Grain, Thickened 80 Sheets, Neutral Acid-Free Journal Paper for Art Students, Beginners, Watercolor, Colored Pencil, Pen, Light Wash, Marker

Zunjue 100% Cotton Paper Block 300g Watercolor Paper, Fine/Medium Grain, Thickened 80 Sheets, Neutral Acid-Free Journal Paper for Art Students, Beginners, Watercolor, Colored Pencil, Pen, Light Wash, Marker

$27.20

Outdoor Waterproof Dry Bag for Rafting and Creek Walking - Large Capacity Backpack for Swimming, Hiking, Diving, and Flood Rescue

Outdoor Waterproof Dry Bag for Rafting and Creek Walking - Large Capacity Backpack for Swimming, Hiking, Diving, and Flood Rescue

$132.00

Lukang 995 Door and Window Fast-Drying Glass Sealant - Transparent Weather-Resistant Neutral Silicone Structural Adhesive

Lukang 995 Door and Window Fast-Drying Glass Sealant - Transparent Weather-Resistant Neutral Silicone Structural Adhesive

$222.90

Large Flip-Type Water Draining and Air Drying Machine, Fully Automatic Air Knife Blower for Vegetables, Commercial Continuous Drying Equipment

Large Flip-Type Water Draining and Air Drying Machine, Fully Automatic Air Knife Blower for Vegetables, Commercial Continuous Drying Equipment

$15,282.00

Large Capacity Household Quilt Storage Bag - Waterproof and Moisture-Proof Duvet Organizer for Moving, Packing, and Luggage Sorting

Large Capacity Household Quilt Storage Bag - Waterproof and Moisture-Proof Duvet Organizer for Moving, Packing, and Luggage Sorting

$5.88

Scented Candle Aluminum Alloy Turntable 360-Degree Rotating Double-Sided Silent Non-Slip Small Turntable for Cake Decorating and DIY

Scented Candle Aluminum Alloy Turntable 360-Degree Rotating Double-Sided Silent Non-Slip Small Turntable for Cake Decorating and DIY

$30.40

Ceramic Five Oxen Painting Brush Washer – Antique-Style Ink Well for Calligraphy & Traditional Painting

Ceramic Five Oxen Painting Brush Washer – Antique-Style Ink Well for Calligraphy & Traditional Painting

$16.90

Liupintang 3-in-1 Brush Washing Bucket with Palette - Portable Handheld Multi-Function Art Tool for Chinese Painting, Watercolor, and Gouache, Foldable Small Pail

Liupintang 3-in-1 Brush Washing Bucket with Palette - Portable Handheld Multi-Function Art Tool for Chinese Painting, Watercolor, and Gouache, Foldable Small Pail

$17.80

ZGT Type Damped Spring Vibration Isolator for Large Equipment such as Chillers and Diesel Generator Sets

ZGT Type Damped Spring Vibration Isolator for Large Equipment such as Chillers and Diesel Generator Sets

$135.00

Shanlian Lake Brush Wool Felt Mat for Calligraphy and Painting, Washable Desk Pad for Beginners

Shanlian Lake Brush Wool Felt Mat for Calligraphy and Painting, Washable Desk Pad for Beginners

$22.70

New Silicone Data Cable Protector, Anti-Break and Anti-Bite Cord Organizer for Charging Lines and Headphones, Universal Phone Accessory

New Silicone Data Cable Protector, Anti-Break and Anti-Bite Cord Organizer for Charging Lines and Headphones, Universal Phone Accessory

$5.58

Cafeteria Bulb Vegetable Cutter - Complete Kelp Shredding Production Line, All-in-One Slicing, Dicing, and Shredding Machine

Cafeteria Bulb Vegetable Cutter - Complete Kelp Shredding Production Line, All-in-One Slicing, Dicing, and Shredding Machine

$10,000.00

Electric Water Dispenser Pump for Bottled Mineral Water - Automatic Press-Type Purified Water Pump Manufacturer

Electric Water Dispenser Pump for Bottled Mineral Water - Automatic Press-Type Purified Water Pump Manufacturer

$113.00

Heavy-Duty Industrial Wiping Cloths for Auto Painting, Baking, Film Application, Detailing, and Degreasing – Absorbent, Oil-Removing, Lint-Free Paper and Cloth

Heavy-Duty Industrial Wiping Cloths for Auto Painting, Baking, Film Application, Detailing, and Degreasing – Absorbent, Oil-Removing, Lint-Free Paper and Cloth

$120.00

6-Cavity Oval Beehive Silicone Mold for DIY Handmade Soap - Heat-Resistant Non-Stick Large Mold for Milk and Essential Oil Soaps

6-Cavity Oval Beehive Silicone Mold for DIY Handmade Soap - Heat-Resistant Non-Stick Large Mold for Milk and Essential Oil Soaps

$4.93

Data Cable Organizer Bag with Zipper for Charging Cables and Adapters - Dustproof Desktop Storage

Data Cable Organizer Bag with Zipper for Charging Cables and Adapters - Dustproof Desktop Storage

$5.90

Auby Baby Rattle Toy for 6+ Months, Chewable Wave Drum and Shaker for Newborns and Toddlers

Auby Baby Rattle Toy for 6+ Months, Chewable Wave Drum and Shaker for Newborns and Toddlers

$24.90

Preferred 45L Industrial Pulping Machine Spinach Fresh Pulp Galangal Carrot Tomato Sauce Making Fruit and Vegetable Industry Blender

Preferred 45L Industrial Pulping Machine Spinach Fresh Pulp Galangal Carrot Tomato Sauce Making Fruit and Vegetable Industry Blender

$7,632.00

KAD Professional Thickened Sketch Blending Stump - Dual-Head Smudging Pen for Art Students

KAD Professional Thickened Sketch Blending Stump - Dual-Head Smudging Pen for Art Students

$9.90

Beijing Imported Dental Implant Package - Appointment Booking, X-Ray, and Treatment Plan Included

Beijing Imported Dental Implant Package - Appointment Booking, X-Ray, and Treatment Plan Included

$1.00

Huahu [Top Layer Cowhide] Japanese-Style Men's Genuine Leather Belt, Simple Casual Business Wide Belt with Automatic Buckle

Huahu [Top Layer Cowhide] Japanese-Style Men's Genuine Leather Belt, Simple Casual Business Wide Belt with Automatic Buckle

$423.00

Wall-Mounted Towel Storage Box Large Capacity for Bathroom

Wall-Mounted Towel Storage Box Large Capacity for Bathroom

$8.42

Loctite 480/411/403/407/406/414/420/401/415 Heat-Resistant 495 High-Temp 417/416 Instant Adhesive

Loctite 480/411/403/407/406/414/420/401/415 Heat-Resistant 495 High-Temp 417/416 Instant Adhesive

$26.80