Skip to main content
Home / Screws / M3 M4 M5 M6 M8 M10 M12 304 Stainless Steel Socket Head Three-Piece Combination Screw Flat Spring Washer Integrated Bolt

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Socket Head (Allen Drive)
Available Sizes M3, M4, M5, M6, M8, M10, M12
Configuration Three-Piece Integrated (Screw + Flat Washer + Spring Washer)
Thread Type Metric Coarse Thread
Finish Polished Silver
Corrosion Resistance High (Suitable for Indoor and Outdoor Use)
Application Machinery, Electronics, Automotive, and Furniture Assembly
Drive Size Varies by Screw Diameter (Hex Key Required)
Package Content Assorted Kit with Storage Case

6 reviews

A

Anonymous

Mar 27, 2026

Rating: 5/5

Essential for machinery repair

I use these for repairing conveyor belt guides. The combination of the spring washer prevents loosening due to vibration effectively. Highly recommend for any mechanical application.

A

Anonymous

Mar 14, 2026

Rating: 4/5

Good variety pack

The kit covers all the common sizes I need. The M6 and M8 sizes are my most used. Only wish the case had better labeling for each compartment, but the screws themselves are top-notch.

A

Anonymous

Mar 11, 2026

Rating: 4/5

Great quality, slightly tight fit

The stainless steel quality is excellent and they look great. The washers are held on tightly, which is good for shipping but required a bit of extra torque to start threading. Overall very satisfied.

A

Anonymous

Mar 08, 2026

Rating: 5/5

Convenient and rust-resistant

Bought these for an outdoor garden bench project. After several months of exposure to rain, there is no sign of rust. The integrated design makes installation much faster.

A

Anonymous

Mar 08, 2026

Rating: 5/5

Professional grade fasteners

As an electronics assembler, precision matters. These screws have clean threads and the hex heads don't strip easily. The three-piece combo ensures a secure connection every time.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Perfect all-in-one solution

These integrated screws save so much time during assembly. Having the flat and spring washers pre-attached is a game changer for my workshop projects. The 304 steel feels very durable.

5 FAQ

Q: What is the hardness rating of these bolts?

A: These are standard 304 Stainless Steel fasteners, typically corresponding to a strength class of A2-70, which is suitable for most general industrial and commercial applications.

Q: Can the washers be removed if I only need the screw?

A: The washers are designed to stay attached during installation for convenience. While they can be forced off, it may damage the finish. We recommend using them as an integrated unit.

Q: Are these suitable for marine environments?

A: While 304 Stainless Steel offers good corrosion resistance, for constant exposure to saltwater or harsh marine environments, we recommend 316 Stainless Steel for superior protection.

Q: Do these screws come with the Allen key needed to install them?

A: No, this kit includes only the integrated screws. You will need to use your own metric hex key set appropriate for the specific screw size you are using.

Q: Is there a bulk discount available for ordering multiple kits?

A: Yes, we offer tiered pricing for bulk orders. Please contact our sales team directly or add large quantities to your cart to see the automatic discount applied at checkout.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Lechuang Commercial Electric Heated Display Warmer - Countertop Food Warmer for Cooked Foods, Bread, and Pizza

Lechuang Commercial Electric Heated Display Warmer - Countertop Food Warmer for Cooked Foods, Bread, and Pizza

$1,250.00

Model 2500-480 Independent Rotary Die Second-Hand Special Sale Independent Light Pressure Front Edge with Die Cutting Speed 120-150

Model 2500-480 Independent Rotary Die Second-Hand Special Sale Independent Light Pressure Front Edge with Die Cutting Speed 120-150

$2,000.00

Fishing Alarm Portable Electronic Fishing Bite Alarm Night

Fishing Alarm Portable Electronic Fishing Bite Alarm Night

$60.27

Shengxitao 304 Stainless Steel Expandable Dish Drainer Basket for Kitchen Sink, Dish Rack Organizer

Shengxitao 304 Stainless Steel Expandable Dish Drainer Basket for Kitchen Sink, Dish Rack Organizer

$58.60

Industrial Scouring Pad with Abrasive Grit - Sandpaper Cloth for Rust Removal, Polishing, and Dishwashing

Industrial Scouring Pad with Abrasive Grit - Sandpaper Cloth for Rust Removal, Polishing, and Dishwashing

$0.34

Traveling-Type Air Flotation Skimmer and Foam Remover, Reciprocating Fully Automatic Oil Skimming and Floating Debris Removal Machine

Traveling-Type Air Flotation Skimmer and Foam Remover, Reciprocating Fully Automatic Oil Skimming and Floating Debris Removal Machine

$5,159.00

Language of Drums Motion Path Set Drum Creativity Essence Rhythm Drum Kit Teaching Material Jazz Drum

Language of Drums Motion Path Set Drum Creativity Essence Rhythm Drum Kit Teaching Material Jazz Drum

$59.17

1.9m Wide-Format Sublimation Printer for Pillows, Garments, and Fabric Digital Printing

1.9m Wide-Format Sublimation Printer for Pillows, Garments, and Fabric Digital Printing

$600.00

Automatic Retractable Air Hose Reel - Pneumatic Shrinking Hose Drum Combo for Auto Repair (Air, Electric, Water) - National Standard

Automatic Retractable Air Hose Reel - Pneumatic Shrinking Hose Drum Combo for Auto Repair (Air, Electric, Water) - National Standard

$228.00

Marie's Paper Blending Stumps Thickened Xuan Paper Blending Stumps Marie's Student Sketch Set Blending Stumps Rubbing Cotton Painting Special Paper Blending Stumps Smudging Pens Art Supplies Xuan Paper Sketch Fixative

Marie's Paper Blending Stumps Thickened Xuan Paper Blending Stumps Marie's Student Sketch Set Blending Stumps Rubbing Cotton Painting Special Paper Blending Stumps Smudging Pens Art Supplies Xuan Paper Sketch Fixative

$5.09

Inner Mongolia Milk Skin Processing Equipment - Condensed Milk and Butter Production Line, Fully Automatic Cheese Making Machine

Inner Mongolia Milk Skin Processing Equipment - Condensed Milk and Butter Production Line, Fully Automatic Cheese Making Machine

$13,580.00

Yijiayi Plastic Surgery - Hair Follicle Analysis to Assess Growth, Prevent Hair Loss, and Plan Transplants

Yijiayi Plastic Surgery - Hair Follicle Analysis to Assess Growth, Prevent Hair Loss, and Plan Transplants

$10.00

Hell Training Rock Guitar by Shinichi Kobayashi - Electric Guitar Speed Playing Tutorial

Hell Training Rock Guitar by Shinichi Kobayashi - Electric Guitar Speed Playing Tutorial

$106.00

Mai Da Chu Commercial Food Warmer Cabinet, Large-Capacity Constant-Temperature Heating Cart for Banquets, Hotels, and Kitchens

Mai Da Chu Commercial Food Warmer Cabinet, Large-Capacity Constant-Temperature Heating Cart for Banquets, Hotels, and Kitchens

$8,165.00

Children's Activity Appliance Storage Box - Case for Braces, Underbite Correctors, Expanders, and Denture Cleaning

Children's Activity Appliance Storage Box - Case for Braces, Underbite Correctors, Expanders, and Denture Cleaning

$16.80

Stainless Steel Cable Raceway Arc-Shaped Anti-Step Floor Metal Surface Mount Decorative Invisible Wire Channel

Stainless Steel Cable Raceway Arc-Shaped Anti-Step Floor Metal Surface Mount Decorative Invisible Wire Channel

$2.50

Electric Watercolor Spray Pen Children Hand-painted Color Pa

Electric Watercolor Spray Pen Children Hand-painted Color Pa

$46.55

408 Fast-Drying Glue - Strong Low-Whitening Instant Adhesive for Metal and Plastic, Heat Resistant

408 Fast-Drying Glue - Strong Low-Whitening Instant Adhesive for Metal and Plastic, Heat Resistant

$53.12

UE5.1-5.7 Ancient Sci-Fi Gate Model Instrument Consultation

UE5.1-5.7 Ancient Sci-Fi Gate Model Instrument Consultation

$2.00

Biliansheng Hair Transplant - Non-Shave Female Hairline Restoration & Density Enhancement

Biliansheng Hair Transplant - Non-Shave Female Hairline Restoration & Density Enhancement

$19,999.00

Water Brush Pen Set Large Capacity Beginner Gouache Solid Watercolor Paint Brush Tools Line Drawing Art Student

Water Brush Pen Set Large Capacity Beginner Gouache Solid Watercolor Paint Brush Tools Line Drawing Art Student

$32.00

Beginner Watercolor Painting Line Art Coloring Book, Hua Meng Lv Ren by Stan, Fine Texture, 2-Pack Free Shipping

Beginner Watercolor Painting Line Art Coloring Book, Hua Meng Lv Ren by Stan, Fine Texture, 2-Pack Free Shipping

$10.60

New Wanli Tire 265/45R21 SU306+ - Compatible with AITO M7, BYD Tang, Range Rover, Li Auto, and NIO

New Wanli Tire 265/45R21 SU306+ - Compatible with AITO M7, BYD Tang, Range Rover, Li Auto, and NIO

$528.00

Suzhou Factory Wholesale Chain Store Logo - RGB Illuminated Letters, Acrylic Neon Signs for Window and Counter Display

Suzhou Factory Wholesale Chain Store Logo - RGB Illuminated Letters, Acrylic Neon Signs for Window and Counter Display

$1,911.00

RoHS 1.0 Environmental Tester for Alloy Analysis and Heavy Metal Detection in Plastic Toys

RoHS 1.0 Environmental Tester for Alloy Analysis and Heavy Metal Detection in Plastic Toys

$15.30

Mont Marte Long-Handle Bristle Brush – Professional Art Brush for Acrylics, Oil Painting, and Flat Wash Techniques

Mont Marte Long-Handle Bristle Brush – Professional Art Brush for Acrylics, Oil Painting, and Flat Wash Techniques

$37,500.00

Portable Plastic Backpack Fertilizer Bucket for Manual Fruit Picking, Seed Feeding, and PPC Fertilization

Portable Plastic Backpack Fertilizer Bucket for Manual Fruit Picking, Seed Feeding, and PPC Fertilization

$9.50

Chinese-Style Hand-Drawn Plant Line Art Coloring Book on 100% Cotton Watercolor Paper

Chinese-Style Hand-Drawn Plant Line Art Coloring Book on 100% Cotton Watercolor Paper

$15.80

Eagle Brand 99021 Industrial Scouring Pads, Cleaning Cloths, and Polishing Pads Supply

Eagle Brand 99021 Industrial Scouring Pads, Cleaning Cloths, and Polishing Pads Supply

$666.00

Pad Printing Machine Parts - Zhongke 4-Inch Blade Clamp, Blade Holder, and Doctor Blade Frame (In Stock)

Pad Printing Machine Parts - Zhongke 4-Inch Blade Clamp, Blade Holder, and Doctor Blade Frame (In Stock)

$4.50