Skip to main content
Home / Screws / Carbon Steel Black Countersunk Phillips Screws and Nuts Combination Kit, Flat Head Screws, Nuts, Flat Washers, and Spring Washers M3 M4

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material Carbon Steel
Finish Black Oxide
Head Style Flat Head (Countersunk)
Drive Type Phillips
Included Sizes M3, M4
Kit Contents Screws, Nuts, Flat Washers, Spring Washers
Thread Type Metric Coarse
Application General Assembly, Machinery, Electronics
Corrosion Resistance Moderate (Indoor Use Recommended)
Package Type Compartmentalized Storage Box

6 reviews

A

Anonymous

Mar 30, 2026

Rating: 4/5

Good value, organized box

The compartmentalized box makes it easy to find the right size quickly. One of the M4 nuts was slightly tight, but overall a great purchase.

A

Anonymous

Mar 24, 2026

Rating: 4/5

Solid basic kit

Does exactly what it says. The black coating seems durable so far. Would be nice to have M5 sizes included, but for M3 and M4, this is excellent.

A

Anonymous

Mar 17, 2026

Rating: 5/5

High quality carbon steel

Very sturdy screws. I used them to assemble a metal shelf and they held up perfectly under pressure. Highly recommend for DIY enthusiasts.

A

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for my workshop needs

This kit has everything I needed for several small repair jobs. The black finish looks professional and the screws fit tightly without stripping.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Great assortment

Having both flat and spring washers included saved me a trip to the hardware store. The Phillips heads are well-formed and easy to drive.

A

Anonymous

Mar 06, 2026

Rating: 5/5

Best seller for a reason

Fast shipping and the product quality exceeded my expectations. The countersunk heads sit flush as expected. Will buy again.

5 FAQ

Q: Are these screws suitable for outdoor use?

A: These screws have a black oxide finish which offers some protection, but they are best suited for indoor applications. For outdoor use, we recommend stainless steel options to prevent rust.

Q: What is the length range of the M3 screws in this kit?

A: The M3 screws in this combination kit typically range from 6mm to 20mm in length, covering most standard assembly requirements.

Q: Can I buy just the M4 nuts separately?

A: Currently, these items are only available as part of the complete combination kit. We do not sell individual components separately at this time.

Q: Does the kit include a screwdriver?

A: No, this kit includes only the fasteners (screws, nuts, and washers). Tools are not included.

Q: Is the storage box resealable?

A: Yes, the kit comes in a sturdy plastic box with a snap-lock lid to keep your hardware organized and secure.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Pirelli PZ4 Tires, Sizes 235/245/255/265/285/40/45/50/55 R19/R20/R21/R22

Pirelli PZ4 Tires, Sizes 235/245/255/265/285/40/45/50/55 R19/R20/R21/R22

$350.00

Wooden Plaque Carved Signboard for Business Opening, Antique-Style Shop Entrance Header, Custom Engraved Solid Wood Couplets MWU

Wooden Plaque Carved Signboard for Business Opening, Antique-Style Shop Entrance Header, Custom Engraved Solid Wood Couplets MWU

$182.96

Kumho ES01 Car Tires: Sizes 155/165/175/185/205 with Aspect Ratios 55/60/69 and Rim Diameters 14/15/16/17

Kumho ES01 Car Tires: Sizes 155/165/175/185/205 with Aspect Ratios 55/60/69 and Rim Diameters 14/15/16/17

$458.00

Mont Marte Paint Brushes, Creative Children's Painting Brush Set (3 Pieces), Tempera Brush Kit for Kids

Mont Marte Paint Brushes, Creative Children's Painting Brush Set (3 Pieces), Tempera Brush Kit for Kids

$6.50

Baohong Watercolor Paper 300g 8K/4K - Wood Pulp A1/A3/K3 350g Fine/Coarse Grain for Watercolor and Oil Pastels 4K

Baohong Watercolor Paper 300g 8K/4K - Wood Pulp A1/A3/K3 350g Fine/Coarse Grain for Watercolor and Oil Pastels 4K

$4.00

Imported IK7 Linear Bearing LM 162837 203242 254059 304564 3552O0 UU

Imported IK7 Linear Bearing LM 162837 203242 254059 304564 3552O0 UU

$96.00

Used Car Tires Auto Salvage Tires 155 165 175 185 195 205 215 1U3 14 15 16

Used Car Tires Auto Salvage Tires 155 165 175 185 195 205 215 1U3 14 15 16

$202.00

Magnetic Charging Stand for MIJIA Smart Audio Glasses (Enjoyment Edition) & Jiehuan AI Glasses – Wireless Installation for Type 86 Box

Magnetic Charging Stand for MIJIA Smart Audio Glasses (Enjoyment Edition) & Jiehuan AI Glasses – Wireless Installation for Type 86 Box

$84.10

Premium DIY Succulent Sand Painting Scented Candle Kit for Holidays and Team Building

Premium DIY Succulent Sand Painting Scented Candle Kit for Holidays and Team Building

$21.20

2018 / New 2024 Rockschool Drum Kit Levels 0-8 Complete with Bonus Audio

2018 / New 2024 Rockschool Drum Kit Levels 0-8 Complete with Bonus Audio

$21.98

Hanyue Cordura N66 Rafting Dry Bag - Ultra-Light Waterproof Storage for Outdoor Swimming and Trekking

Hanyue Cordura N66 Rafting Dry Bag - Ultra-Light Waterproof Storage for Outdoor Swimming and Trekking

$35.70

Sketchbook for Casual Drawing, Acrylic Marker and Watercolor Pad, Square Pocket Art Book, Portable Travel Journal with Thick 230g White Cardstock

Sketchbook for Casual Drawing, Acrylic Marker and Watercolor Pad, Square Pocket Art Book, Portable Travel Journal with Thick 230g White Cardstock

$5.50

Wenxin Tang Calligraphy Copybook for Beginners, Regular Script Duobao Pagoda, Running Script Lanting Preface, Small Kai Lingfei Jing, Brush Character Cards

Wenxin Tang Calligraphy Copybook for Beginners, Regular Script Duobao Pagoda, Running Script Lanting Preface, Small Kai Lingfei Jing, Brush Character Cards

$23.80

Resistor NXBU714 for ABB ACS800 Inverter

Resistor NXBU714 for ABB ACS800 Inverter

$560.00

3D Printing Pen for Kids - Edible Malt Sugar Art DIY Kit for Birthdays (Age 6+)

3D Printing Pen for Kids - Edible Malt Sugar Art DIY Kit for Birthdays (Age 6+)

$39.00

Professional Rotating Car Tire and Wheel Cleaning Rack – Effortless Washing Stand

Professional Rotating Car Tire and Wheel Cleaning Rack – Effortless Washing Stand

$245.00

Nangong Wenfang Three-Character Classic Small Regular Script Copybook – Transparent Cards for Calligraphy Practice Beginners

Nangong Wenfang Three-Character Classic Small Regular Script Copybook – Transparent Cards for Calligraphy Practice Beginners

$69.00

Over-Washing Machine Shelf, Multi-Function Flip-Top Storage Cabinet for Toilet, Bathroom Floor-Standing Unit with No Drilling Required

Over-Washing Machine Shelf, Multi-Function Flip-Top Storage Cabinet for Toilet, Bathroom Floor-Standing Unit with No Drilling Required

$32.88

UGREEN Cable Organizer, Magnetic Desktop Data Wire Fixer, Phone Charging Clip and Cord Collector

UGREEN Cable Organizer, Magnetic Desktop Data Wire Fixer, Phone Charging Clip and Cord Collector

$15.90

Compact Manual Water Pump Dispenser for Home Desktop Use – Mini Hand-Press Faucet for Large Water Buckets

Compact Manual Water Pump Dispenser for Home Desktop Use – Mini Hand-Press Faucet for Large Water Buckets

$23.10

Traditional Sheepskin Rattle Baby Chewable Old-Style Handmade Newborn Wave Drum Toy for Children 0-6 Months

Traditional Sheepskin Rattle Baby Chewable Old-Style Handmade Newborn Wave Drum Toy for Children 0-6 Months

$17.80

Amazon Best Seller Clearance - Outdoor Waterproof Dry Bag for Swimming, Rafting, Snorkeling, and Diving

Amazon Best Seller Clearance - Outdoor Waterproof Dry Bag for Swimming, Rafting, Snorkeling, and Diving

$135.00

Huirui 420AB Fast-Curing Silicone Adhesive - High-Strength Instant Glue for Bonding Silicone Metal Plastic and Velcro

Huirui 420AB Fast-Curing Silicone Adhesive - High-Strength Instant Glue for Bonding Silicone Metal Plastic and Velcro

$36.00

IGBT Module FP15R12KE3/FP25R12KE3/FS50R12KE3/FS75R12KE3

IGBT Module FP15R12KE3/FP25R12KE3/FS50R12KE3/FS75R12KE3

$250.00

3F UL Gear Ventilated Waterproof Dry Bag – Compressible Storage for Sleeping Bags, Clothes, and Swim Gear

3F UL Gear Ventilated Waterproof Dry Bag – Compressible Storage for Sleeping Bags, Clothes, and Swim Gear

$40.80

Martini 100% Cotton Watercolor Paper 200g/300g Thickened Art Sketch Paper 4K Drawing Paper

Martini 100% Cotton Watercolor Paper 200g/300g Thickened Art Sketch Paper 4K Drawing Paper

$12.00

Flameless Aromatherapy DIY Kit - Natural Crystal Diffuser Stones for Home Decor and Demagnetizing

Flameless Aromatherapy DIY Kit - Natural Crystal Diffuser Stones for Home Decor and Demagnetizing

$4.68

[Ali Health] Dental Implant Initial Consultation Package, Oral Cavity Filling, Crown, Denture, and Implant Assessment

[Ali Health] Dental Implant Initial Consultation Package, Oral Cavity Filling, Crown, Denture, and Implant Assessment

$7.90

3M Industrial Scouring Pad for Polishing, Cleaning, and Rust Removal - Bulk Factory Supply with Aluminum Oxide

3M Industrial Scouring Pad for Polishing, Cleaning, and Rust Removal - Bulk Factory Supply with Aluminum Oxide

$7.20

Bull Socket Storage Box - Multi-Outlet Power Strip with Cord, Home Multifunctional Desktop Cable Organizer, Power Junction Board

Bull Socket Storage Box - Multi-Outlet Power Strip with Cord, Home Multifunctional Desktop Cable Organizer, Power Junction Board

$85.90