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)
Leyingfang Floating Pen for Kids' Water Drawing, Colorful Water-Soluble Suspended Markers, Erasable Watercolor Pens

Leyingfang Floating Pen for Kids' Water Drawing, Colorful Water-Soluble Suspended Markers, Erasable Watercolor Pens

$13.80

Loose Rose Quartz Beads, Donghai Agate, Chalcedony, Jadeite, and Madagascar Pink Crystal for DIY Jewelry Making

Loose Rose Quartz Beads, Donghai Agate, Chalcedony, Jadeite, and Madagascar Pink Crystal for DIY Jewelry Making

$6.72

Expandable Stainless Steel Sink Rack, Multi-Function Kitchen Drain Board for Fruits, Vegetables, and Utensils

Expandable Stainless Steel Sink Rack, Multi-Function Kitchen Drain Board for Fruits, Vegetables, and Utensils

$14.90

Transparent Retainer Case Aligner Storage Box Portable Carry-On Squeeze Bag Orthodontic Appliance Rubber Band Cleaning Box

Transparent Retainer Case Aligner Storage Box Portable Carry-On Squeeze Bag Orthodontic Appliance Rubber Band Cleaning Box

$18.50

Transparent Data Cable Organizer Bag for Travel - Portable Multi-Use Visible Storage for Digital Chargers and Cable Management

Transparent Data Cable Organizer Bag for Travel - Portable Multi-Use Visible Storage for Digital Chargers and Cable Management

$7.36

Finished Seal Calligraphy Finished Stone Stamp Sellos Chines

Finished Seal Calligraphy Finished Stone Stamp Sellos Chines

$108.58

Chunfei Grocery Store Commuter Hard Fork Low-Beam Mountain Bike for Urban Roads, Suburbs, School, and Outings

Chunfei Grocery Store Commuter Hard Fork Low-Beam Mountain Bike for Urban Roads, Suburbs, School, and Outings

$2,247.00

6-Cavity Large Square French Flower DIY Soap Silicone Mold for Essential Oil and Milk Soap

6-Cavity Large Square French Flower DIY Soap Silicone Mold for Essential Oil and Milk Soap

$4.93

Home Balcony Vegetable Planter - Self-Watering Plastic Pot for Strawberries and Succulents

Home Balcony Vegetable Planter - Self-Watering Plastic Pot for Strawberries and Succulents

$28.00

Pressure Swing Adsorption Nitrogen Generator - High-Purity Nitrogen Device for Heat Treatment

Pressure Swing Adsorption Nitrogen Generator - High-Purity Nitrogen Device for Heat Treatment

$36,456.00

6-Cavity 3D Rose Silicone Mold for DIY Soap Making Heat-Resistant Non-Stick Large Size for Milk Soap and Essential Oil Soap

6-Cavity 3D Rose Silicone Mold for DIY Soap Making Heat-Resistant Non-Stick Large Size for Milk Soap and Essential Oil Soap

$5.80

Traditional Handmade Baby Teething Rattle Sheepskin Wooden Clapper Newborn Toy Intangible Cultural Heritage

Traditional Handmade Baby Teething Rattle Sheepskin Wooden Clapper Newborn Toy Intangible Cultural Heritage

$29.85

Manufacturer Supply ZSJC02 Film Splicing Table, Alignment Table, Film Inspection Table

Manufacturer Supply ZSJC02 Film Splicing Table, Alignment Table, Film Inspection Table

$4,484.00

Box-Type Oxygen Generator Export Equipment - Stable Nitrogen and Oxygen Production for Wastewater Treatment

Box-Type Oxygen Generator Export Equipment - Stable Nitrogen and Oxygen Production for Wastewater Treatment

$25,000.00

Wholesale Acrylic Paint Stick Set, 3ml x 12 Colors, Non-Toxic for Children's DIY and Street Art

Wholesale Acrylic Paint Stick Set, 3ml x 12 Colors, Non-Toxic for Children's DIY and Street Art

$2.01

Cheese Processing Equipment - Small Pasteurized Fresh Milk Production Line, Fully Automatic Cheese Making Machine

Cheese Processing Equipment - Small Pasteurized Fresh Milk Production Line, Fully Automatic Cheese Making Machine

$66,500.00

Household Mini Range Hood, Portable USB Desktop Smoke Extractor for Living Room Hot Pot & BBQ Odor Removal

Household Mini Range Hood, Portable USB Desktop Smoke Extractor for Living Room Hot Pot & BBQ Odor Removal

$41.00

Sanitary Grade Stainless Steel Low-Temperature Vacuum Single-Effect Falling Film Evaporator for Milk Powder and Juice Processing

Sanitary Grade Stainless Steel Low-Temperature Vacuum Single-Effect Falling Film Evaporator for Milk Powder and Juice Processing

$4,158.00

Chain Shortener & Lifting Rigging - Double Chain Hook Assembly for Overhead Cranes and Hoists

Chain Shortener & Lifting Rigging - Double Chain Hook Assembly for Overhead Cranes and Hoists

$130.00

Youlian Toast Shaping Machine Dough Molder Square Bread Shaper Bakery Equipment YSN-T380

Youlian Toast Shaping Machine Dough Molder Square Bread Shaper Bakery Equipment YSN-T380

$9,695.20

Michelin Tire 255/50R20 109V - Compatible with VW Teramont, Trumpchi GS8, AITO M7, Li Auto L7/L8/L9, and NIO ES6

Michelin Tire 255/50R20 109V - Compatible with VW Teramont, Trumpchi GS8, AITO M7, Li Auto L7/L8/L9, and NIO ES6

$550.00

Traditional Wooden Rattle with Sheepskin Head for Early Education Newborns Boys and Girls Visual Tracking Grip and Hearing Training

Traditional Wooden Rattle with Sheepskin Head for Early Education Newborns Boys and Girls Visual Tracking Grip and Hearing Training

$11.88

French Canson Classic Printmaking Paper 100% Cotton 320g for Screen Printing, Woodcut, Copperplate, Lithography; 250g Cotton Pulp 60*76cm Half Sheet 8K Quarter Sheet A4 Printmaking Painting Tool Set Ink Roll Rubbing Paper

French Canson Classic Printmaking Paper 100% Cotton 320g for Screen Printing, Woodcut, Copperplate, Lithography; 250g Cotton Pulp 60*76cm Half Sheet 8K Quarter Sheet A4 Printmaking Painting Tool Set Ink Roll Rubbing Paper

$7.65

Fan Start Capacitor 8uF for ABB ACS800 VFD

Fan Start Capacitor 8uF for ABB ACS800 VFD

$350.00

babycare Baby Rattle with Teether for Newborns, Silicone Shaker Bell Educational Toy for Infants and Toddlers

babycare Baby Rattle with Teether for Newborns, Silicone Shaker Bell Educational Toy for Infants and Toddlers

$39.90

Class 100 Clean Workbench and Laminar Flow Hood, Negative Pressure Weighing Booth, Direct from Manufacturer

Class 100 Clean Workbench and Laminar Flow Hood, Negative Pressure Weighing Booth, Direct from Manufacturer

$2,475.00

1.9m 4-Printhead Digital Sublimation Printer for Diatom Mud, Polyester Fabric, and Garment Heat Transfer Printing

1.9m 4-Printhead Digital Sublimation Printer for Diatom Mud, Polyester Fabric, and Garment Heat Transfer Printing

$600.00

ergo5950 Acrylic Specialty Adhesive - High-Strength Bond for Acrylic Sheets, PMMA, Glass, Fish Tanks, PLA, and PC Boards

ergo5950 Acrylic Specialty Adhesive - High-Strength Bond for Acrylic Sheets, PMMA, Glass, Fish Tanks, PLA, and PC Boards

$57.84

Invisalign Orthodontic Retainer Storage Box - Compact Portable Cleaning Case for Teeth Aligners and Dentures

Invisalign Orthodontic Retainer Storage Box - Compact Portable Cleaning Case for Teeth Aligners and Dentures

$12.30

[Camizong] Lilith's Claw – Gothic-Style Fork Acrylic Check-In Stick for Badge Display with Magnetic Backing

[Camizong] Lilith's Claw – Gothic-Style Fork Acrylic Check-In Stick for Badge Display with Magnetic Backing

$11.70