Best Flat Hex Bolts of 2026

Corey Phillips Avatar
Corey Phillips
Last Updated: 5 Feb 2026

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Flat hex bolts are essential hardware components used in various industries such as construction, automotive, and manufacturing. These bolts feature a six-sided head and a flat bearing surface designed to distribute the load and prevent damage to the materials being fastened. They are available in different sizes, materials, and finishes to suit different applications. Flat hex bolts are known for their strength, durability, and reliability. They are commonly used to join two or more objects together and provide stability and support to structures.

At a Glance: Our Top Picks

72 Pcs M6 Hex Socket Bolt Set Cover #TOP 1
72 Pcs M6 Hex Socket Bolt Set
ftb score rating icon 9.8
AMLOOPH M6 Bolts, M6 x 60mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts Cover #TOP 2
AMLOOPH M6 Bolts, M6 x 60mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts
ftb score rating icon 9.7
10 PCS Bolt M6×20,Stainless Steel Bolts,Flat Head Hex Socket Cap Screws Bolts Cover #TOP 3
10 PCS Bolt M6×20,Stainless Steel Bolts,Flat Head Hex Socket Cap Screws Bolts
ftb score rating icon 9.5

Top 10 Flat Hex Bolts

#TOP 1

72 Pcs M6 Hex Socket Bolt Set

QiXinGYL
Black
72 Pcs M6 Hex Socket Bolt Set Cover
72 Pcs M6 Black Flat Head Furniture Hexagonal Socket Machine Screws

The QiXinGYL Bolt Set includes 72 high-quality carbon steel hex bolts designed for durability and performance. These corrosion-resistant bolts maintain their strength in harsh conditions, ensuring reliable use for various applications. Their flat head design allows for a flush finish, enhancing the appearance of your projects. With a full-thread design, these bolts offer excellent tensile strength, making them easy to tighten and remove without slipping, providing you with convenience and efficiency in your work.

What We Like
Durable carbon steel material
Corrosion-resistant design
Flush flat head finish
Easy to tighten and remove
Variety of sizes included
#TOP 2

AMLOOPH M6 Bolts, M6 x 60mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts

CM6x60mm
M6x60mm
AMLOOPH M6 Bolts, M6 x 60mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts Cover
AMLOOPH M6 Bolts, M6 x 60mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts for Chairs, Cots, Beds and Tables (Pack Of 12- and a Wrench)

Features
Pack Contains-– 12 Galvanized Carbon Steel M6 Bolts 60mm And 1 Hex Wrench
M6 Furniture Screws Type –- M6 Large Flat Head Hex Socket Bolts
Wide Application: Large Flat Head Bolts Are Mainly Used For Connecting Various Furniture Or Parts, Such As Crib, Workbench, Bed, Table, Chair, Cabinets, Boards, Cupboards And Other Furnitures.
M6 Hexagon Head Screws Size--Length (L)-60mm, Threaded Diameter (d)-6mm, Hexagon Head (s)-4mm, Head Diameter (dk)-14.3mm, Head Length (k)-2.3mm, Pitch-1mm
Advantages - These Large Flat Head Screws Provide A Larger Load-Bearing Surface And Are Suitable For Various Sizes Of Holes. They Are Commonly Used As Furniture Screws Or Machine Bolts
#TOP 3

10 PCS Bolt M6×20,Stainless Steel Bolts,Flat Head Hex Socket Cap Screws Bolts

JJPJL
761578228394
M6 x 20
M6 × 20
10 PCS Bolt M6×20,Stainless Steel Bolts,Flat Head Hex Socket Cap Screws Bolts Cover
10 PCS Bolt M6×20,Stainless Steel Bolts,Flat Head Hex Socket Cap Screws Bolts,Allen Socket Bolts Screws,Furniture Screws,M6x20mm,Black(M6×20)

Features
High-Quality Material: A2 V22A Stainless Steel Hex Socket Screws Feature A Burr-Free Finish With Black Electroplating. They Resist Fading, Rust, And Scratches. Suitable For Outdoor And Humid Environments.
Product Specifications: You Will Receive 10 M6 X 20 Hex Socket Screws. Thread Diameter: 6 Mm; Screw Length: 20 Mm; Pitch: 1 Mm; Head Diameter: 12.5 Mm; Head Thickness: 2.6 Mm; Hex Socket Size: 4 Mm.
Versatile Applications: 324 Stainless Steel Hex Socket Screws Are Suitable For Furniture (beds, Tables, Cabinets, Chairs, Etc.), Woodwork (joining Timber, Boards, Workbenches, Kitchen Worktops), Office Equipment, Communication Devices, And Assembling Various Mechanical Components.
Caution: Screw Sets Contain Small Parts. Keep Out Of Reach Of Children. Do Not Allow Children To Play With Them To Prevent Accidental Ingestion.
Anti-Slip: Standard Dimensions Ensure Even Force Distribution And Slip Resistance; Crisp Threads With A Smooth, Burr-Free Surface Provide Secure Fastening And Excellent Grip.
#TOP 4

224 Pcs M6 Bolts and Set, Flat Hex

JinZeYou
001-050
Silver
224 Pcs M6 Bolts and Set, Flat Hex Cover
224 Pcs M6 Bolts and Set, Flat Hex, M6 Hex Bolts Sets, Metric Assorted Nuts and Assortment, Outer Hexagon Machine Screws and Nuts and Flat Washers & Lock Washers, Bike

Features
[Hex Bolts And Nuts And Washers Set] The Threads Are Clear And The Pitch Is Uniform, Which Conforms To The Standard Metric System. The Tight Threads Are Not Easy To Deform And Slip When Twisting. The M6 Hex Nuts And Bolts Assortment Design Ensures A More Balanced Force.
[Sturdy And Durable Material] M6 Bolts And Nuts Set Is Made Of High-Quality Stainless Steel Material, Which Is Sturdy And Durable, Not Easy To Deform Or Break, Corrosion-Resistant, Scratch-Resistant, Rust-Resistant, High Hardness, High Strength, And Has Long-Lasting Durability And Stability.
[Wide Application] Suitable For Assembly, Maintenance, And DIY Work In Offices, Factories, Homes, And Workshops. Widely Used In The Fixing Of Parts Such As Machinery, Communication Equipment, Electromechanical Equipment, Marine Equipment, Household Appliances, Engineering Machinery, Bicycles, Automobiles, Motorcycles, Etc.
[Package Included] A Total Of 224 Pcs, 56 Pcs Hex Bolts, 8 Of Each Size, Sizes Include: m6x10mm, m6x12mm, m6x16mm, m6x20mm, m6x25mm, m6x30mm, m6x35mm, 56 Pcs m6 Lock Washers, 56 Pcs m6 Flat Washers, 56 Pcs m6 Nuts, Sufficient Quantity And Rich Sizes To Meet The Usage Needs Of Multiple Scenarios And Fields.
[Hex Nuts & Flat Washers & Lock Washers] Hex Nuts Can Withstand Greater Loads, Making Your Installation More Precise And The Tightening Effect Better; Flat Washers And Spring Washers Increase The Contact Area, Protect The Screws, Provide Strong Holding Force And Maximum Clamping Force, And Extend The Service Life.
#TOP 5

Drenky Hexagon Furniture Bolts, M8 X 16mm Flat Hex Bolt 10 Pack Hex Socket Flanged Button Head Screws Bolts Fully Thread Joint Connector Bolts

PT0816-10
silver
M8 X 16mm, 10 Pcs
Drenky Hexagon Furniture Bolts, M8 X 16mm Flat Hex Bolt 10 Pack Hex Socket Flanged Button Head Screws Bolts Fully Thread Joint Connector Bolts Cover
Drenky Hexagon Furniture Bolts, M8 X 16mm Flat Hex Bolt 10 Pack Hex Socket Flanged Button Head Screws Bolts Fully Thread Joint Connector Bolts, Hardware Screw

Features
Unique Design: The Outer Edge Of The Head Of The Flat Head Furniture Screw Is Round, And The Middle Is A Concave Hexagonal Shape, And The Edge Of The Head Is Chamfered, So That The Bolts Will Not Easily Scratch Or Damage The Surrounding Parts When Assembled, And To Maintain The Finish And Aesthetics Of The Parts.
304 Stainless Steel: Furniture Hex Bolts Are Made Of 304 Stainless Steel, With Smooth And Burr-Free Surface, Clear Pitch, Rust And Corrosion Resistance, As Well As Excellent Strength And Hardness Properties, Suitable For Use In Outdoor Or Wet Environments, Which Ensures That The Screws Have A Long Service Life.
Wide Range Of Applications: Hexagon Furniture Bolts Are Widely Used In Furniture Connection, Machinery Manufacturing, Automotive Industry, Aerospace And Construction Engineering And Other Fields. Its High Strength, High Precision, Corrosion Resistance And Anti-Loosening Properties Ensure The Stable Operation And Long-Term Use Of Equipment In Harsh Environments.
Product Parameters: Size: 8 X 16 Mm; Quantity: 10 Pcs; Material: Stainless Steel 304 (A2); Head Type: Flat Hexagonal. We Offer A Wide Range Of Chamfered Hexagon Socket Head Bolts To Meet Different Fastening Requirements.
High Safety: Hexagonal Design Can Uniformly Transmit Torque, Effectively Preventing The Bolt From Sliding And Falling Off In The Process Of Use, Especially In High Vibration Or High Load Environment, Its Tightness And Safety Is Much Higher Than The Traditional Screws, To Protect The Safety Of Equipment And Personnel.
#TOP 6

Wavanta 20Pcs M8 Bolts, M8 x 20mm Flat Head Hex Socket Cap Screws Bolts

Wavanta
m8 bolts
Black
M8 x 20mm
Wavanta 20Pcs M8 Bolts, M8 x 20mm Flat Head Hex Socket Cap Screws Bolts Cover
Wavanta 20Pcs M8 Bolts, M8 x 20mm Flat Head Hex Socket Cap Screws Bolts, 304 Stainless Steel Furniture Bolt Full Thread, Black Oxide, with Hex Key

Features
Material: Hex Socket Cap Bolts Are Made Of 304 Stainless Steel. Bolts Are Corrosion And Rust Resistant And Can Be Used Outdoors Or In Wet Environments, Strong Solid Structure And Long-Lasting. Please Note That The Magnetic Properties Of 304 Stainless Steel Always Show Weak Magnetic Properties Due To The Structure Transformation Reasons
Product Name: M8 Flat Head Hex Socket Cap Bolts, With Hex Key, Various Sizes And Precise Threads For Various Uses. Thread Diameter: 8mm; Screw Length: 20mm; Thread Pitch: 1.2mm; Head Diameter: 14mm, Head Height: 3.3mm, Hex Key Size: 5mm
Wide Range Of Applications: Stainless Socket Cap Bolts Are Suitable For Furniture Assembly (beds, Tables, Cabinets, Chairs, Etc.), Woodworking Projects (joining Wood, Boards, Workbench, Kitchen Worktops), Office Appliances, Communication Equipment, Ship Assembly, And Various Machinery Industry Needs
Strong And Durable: The Stainless Steel Bolts Can Stand Up To Higher Torque Force, Not Easy To Deform Or Be Damaged. Full Thread, Good Fastening. Smooth Surface, No Burrs, Allen Head, Not Easy To Slip
Package Included: 20 X M8x20mm Flat Head Hex Socket Cap Bolts, 1 X Additional Hex Key For Convenience
#TOP 7

Valorada 20Pcs M5 Bolts, M5 x 20mm Flat Head Hex Socket Screws

Valorada
Hex Socket Screws
‎Silver
M5 x 20mm
Valorada 20Pcs M5 Bolts, M5 x 20mm Flat Head Hex Socket Screws Cover
Valorada 20Pcs M5 Bolts, M5 x 20mm Flat Head Hex Socket Screws, 304 Stainless Steel Furniture Bolts, Full Thread Machine Screws with Hex Key

Features
MATERIAL - 304 Stainless Steel Material Metric Screw Assortment. Valorada 304 Stainless Steel Products Have Been Rigorously Tested, Better Corrosion And Anti-Rust Performance In Different Extreme Environment. Strong Solid Structure And Long-Lasting Machine Screw Assortment Kit. Please Note That The Magnetic Properties Of 304 Steel Always Show Weak Magnetic Properties Due To The Structure Transformation Reasons. M5 Screws Bolt Assortment Metric Bolt Assortment, Machine Screw Assortment Kit
PRODUCT NAME - M5 Socket Head Cap Screw M5x0.8 Bolt Metric Bolt Assortment, M5 Bolts With A Hex Spanner, Various Sizes And Precise Threads For Different Usage. Thread Diameter: 5mm; Screw Length: 20mm; Thread Pitch: 0.8mm; Head Diameter: 10.1mm, Head Height: 2.1mm, Hex Drive Size: 3mm. M5 Bolts Bolt Set Stainless Steel Bolts, Metric Bolt Kit
WIDE RANGE OF APPLICATIONS - 20 Pieces Set. Stainless Socket Head Cap Screw Are Suitable For Furniture Assembly (beds, Tables, Cabinets, Chairs, Etc.), Woodworking Projects (joining Wood, Boards, Workbench, Kitchen Worktops), Office Appliances, Communication Equipment, Ship Assembly, And Various Machinery Industry Needs. Metric Screw Assortment M Screw Assortment, Metric Bolts Metric Screws
PACKAGING: 20 Pieces Of M5 X 20mm Bolts Combination Kit. M5 Bolts Are Available In A Variety Of Lengths To Meet Various Situations. A Free Hex Key Is Included, Which Can Be Used Directly Without Purchasing Additional Tools
HEX SOCKET DRIVE: These Screws Utilize A Hex Socket Drive. The Specialized Hex Key Fully Engages The Recess, Increasing Contact Area. This Reduces Wear Between The Wrench And Screw, Preventing Head Deformation Or Rounding. The Structure Is Robust, Ensuring Stable Torque Transmission And Consistent Performance. The Head Is A Low-Profile Dome Shape, Suitable For Confined Spaces. Threads Are Well-Formed With Precise Dimensions, Resulting In A Neat And Tidy Appearance After Installation
#TOP 8

688 Pcs Hex Bolts and Nuts Set, M4 M5 M6 Machine Bolts and Hex Nuts and Lock Washers and Flat Assortment Kit

MYHongLe
HLMY-001-088
Black
M4, M5, M6
688 Pcs Hex Bolts and Nuts Set, M4 M5 M6 Machine Bolts and Hex Nuts and Lock Washers and Flat Assortment Kit Cover
688 Pcs Hex Bolts and Nuts Set, M4 M5 M6 Machine Bolts and Hex Nuts and Lock Washers and Flat Assortment Kit, Carbon Steel Full Thread with Spring Washers

Features
Hexagonal Bolts: Hexagonal Nuts And Bolts Set Uses A Hexagonal Structure, Which Is Stronger, More Durable And Has A Higher Load Capacity. The Interface Is Tighter, The Connection With The Nut Is Stronger, The Shock Resistance Is Good, And Some Common Loosening Problems Are Solved.
Exquisite Material: Nuts And Bolts Set Are Made Of High-Quality Carbon Steel With Exquisite Workmanship, High Hardness, Corrosion Resistance, Rust Resistance And Oxidation Resistance, Is Not Easy To Break Or Deform During Use, Has Strong Wear Resistance, Is Easy To Disassemble And Is Durable.
Wide Range Of Applications: Widely Used In Construction, Mechanical Engineering, Automobile Manufacturing, Furniture Manufacturing, Aerospace And Other Fields, For Connecting Bearings, Gears, Machine Tools, Couplings And Other Components, And For Fastening And Supporting Building Structures.
Practical Design: The Threads Are Evenly Distributed, The Threads Are Deep And Clear, The Surface Is Smooth And Burr-Free, The Force Is Uniform, It Is Not Easy To Slip During Installation, And The Fastening Performance Is Good. Commonly Used In Various Fields And Plays An Important Role In Various Aspects.
Package Includes: Total 688 Pcs, Including: m4x12mm,m4x16mm,m4x20mm,m4x30mm,m5x16mm,m5x20mm,m5x25mm,m5x30mm,m6x16mm,m6x20mm,m6x25mm,m6x40mm, Including Nuts, Washers, Lock Washers In Appropriate Size And Quantity. Sufficient Amount. Different Sizes Are Available To Meet The Needs Of Different Areas.
#TOP 9

AMLOOPH M6 Bolts, M6 x 40mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts

HM6x40mm
M6x40mm
AMLOOPH M6 Bolts, M6 x 40mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts Cover
AMLOOPH M6 Bolts, M6 x 40mm Hex Socket Large Flat Head Carbon Steel Fully Threaded Furniture Screws/Bolts for Chairs, Cots, Beds and Tables (Pack Of 12- and a Wrench)

Features
Pack Contains-– 12 Galvanized Carbon Steel M6 Bolts 40mm And 1 Hex Wrench
M6 Furniture Screws Type –- M6 Large Flat Head Hex Socket Bolts
Wide Application: Large Flat Head Bolts Are Mainly Used For Connecting Various Furniture Or Parts, Such As Crib, Workbench, Bed, Table, Chair, Cabinets, Boards, Cupboards And Other Furnitures.
M6 Hexagon Head Screws Size--Length (L)-40mm, Threaded Diameter (d)-6mm, Hexagon Head (s)-4mm, Head Diameter (dk)-14.3mm, Head Length (k)-2.3mm, Pitch-1mm
Advantages - These Large Flat Head Screws Provide A Larger Load-Bearing Surface And Are Suitable For Various Sizes Of Holes. They Are Commonly Used As Furniture Screws Or Machine Bolts
#TOP 10

Drenky M4 Black Flat Head Hex Bolt

BPT0410-20
black
M4 X 10mm
Drenky M4 Black Flat Head Hex Bolt Cover
Drenky M4 Black Flat Head Hex Bolt - 304 Stainless Steel Machine Screws, 10mm Furniture Joint Connector - 20 Pack

Features
Unique Design: The Outer Edge Of The Head Of The Flat Head Furniture Screw Is Round, And The Middle Is A Concave Hexagonal Shape, And The Edge Of The Head Is Chamfered, So That The Bolts Will Not Easily Scratch Or Damage The Surrounding Parts When Assembled, And To Maintain The Finish And Aesthetics Of The Parts.
304 Stainless Steel: Furniture Hex Bolts Are Made Of 304 Stainless Steel, Anti-Rust And Anti-Corrosion, Able To Be Used In Outdoor Or Humid Environments. The Surface Treatment Process Of The Screws Is Oxidised Black, Not Electroplated Black Zinc, Which Is Not Easy To Fade, Scratch-Resistant, And More Coordinated With Some Black Equipment.
Wide Range Of Applications: Hexagon Furniture Bolts Are Widely Used In Furniture Connection, Machinery Manufacturing, Automotive Industry, Aerospace And Construction Engineering And Other Fields. Its High Strength, High Precision, Corrosion Resistance And Anti-Loosening Properties Ensure The Stable Operation And Long-Term Use Of Equipment In Harsh Environments.
Product Parameters: Size: 4 X 10 Mm; Quantity: 20 Pcs; Material: Stainless Steel 304 (A2); Head Type: Flat Hexagonal. We Offer A Wide Range Of Chamfered Hexagon Socket Head Bolts To Meet Different Fastening Requirements.
High Safety: Hexagonal Design Can Uniformly Transmit Torque, Effectively Preventing The Bolt From Sliding And Falling Off In The Process Of Use, Especially In High Vibration Or High Load Environment, Its Tightness And Safety Is Much Higher Than The Traditional Screws, To Protect The Safety Of Equipment And Personnel.
Buying Guide Image
Editor's Notes

During our flat hex bolt research, we found 182 flat hex bolt products and shortlisted 10 quality products. We collected and analyzed 5,368 customer reviews through our big data system to write the flat hex bolts list. We found that most customers choose flat hex bolts with an average price of £20.00.

The flat hex bolts are available for purchase. We have researched hundreds of brands and picked the top brands of flat hex bolts, including QiXinGYL, AMLOOPH, JJPJL, JinZeYou, Drenky.

Written by
Corey Phillips Avatar

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.