Best Plastic Socket Cap Screws in 2026

Daisy
Last Updated: Feb 6, 2026

At a Glance: Our Top Picks for Plastic Socket Cap Screws

iexcell 100 Pcs M4 x 20/25/30/35/40 Stainless Steel 304 Hex Socket Button Head Cap Screws Bolts Assortment Kit
#TOP1
Iexcell 100 Pcs M4 X 20/25/30/35/40 Stainless Steel
9.7
PM SCORE
iExcell 250 Pcs M3 x 6/8/10/12/16 Stainless Steel 304 Hex Socket Flat Head Cap Screws Bolts Assortment Kit
#TOP2
Iexcell 250 Pcs M3 X 6/8/10/12/16 Stainless Steel
9.7
PM SCORE
iexcell 200 Pcs M5 x 20/25/30/35/40 Stainless Steel 304 Hex Socket Button Head Cap Screws Bolts Nuts Assortment Kit
#TOP3
Iexcell 200 Pcs M5 X 20/25/30/35/40 Stainless Steel
9.6
PM SCORE

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Summary of the Best Plastic Socket Cap Screws of 2026

Market Overview
Plastic Socket Cap Screws Reviewed
  • Reviews Analyzed: 1681 Items
  • PM Avg. Rating: 7.2 / 10
15 Products Evaluated
  • Highest Price: $19.68
  • Lowest Price: $5.59
  • Avg. Price: $11.21
#TOP1

Iexcell 100 Pcs M4 X 20/25/30/35/40 Stainless Steel 304 Hex Socket Button Head Cap Screws Bolts Assortment Kit

IEXCELL
M4-2040B-SS304
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
iexcell 9.86

Features

✔ Includes 100 Pcs, 5 Sizes, M4 Hex Socket Button Head Cap Screws: M4 x 20, M4 x 25, M4 x 30, M4 x 35, M4 x 40, Thread Size ( Diameter ): 4 mm, Thread pitch: 0.7 mm, Thread Length from 20 mm to 40 mm

✔ Material of Screws: Stainless Steel 304, High Strength And Anti-corrosion in Various Conditions

✔ Includes 1 Pcs Hex Key , Hex Size: 2.5 mm, to Drive These Screws Conveniently and Easily

✔ Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength And Anti-rust

✔ Package: All These Screws and Hex Key Packed In a Sturdy Easy-use Plastic Storage Case, Organized Conveniently and Easily

#TOP2

Iexcell 250 Pcs M3 X 6/8/10/12/16 Stainless Steel 304 Hex Socket Flat Head Cap Screws Bolts Assortment Kit

IEXCELL
FM306165A21
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
iexcell 9.85

Features

✔ Screw Head Style: Flat Head, Screw Drive Style: Internal Hex Drives, Known as Hex Socket Drives, Hex Size: 2.0 mm; Head Diameter: 5.8 mm; Thread Pitch: 0.5 mm; Thread Dia. : 3 mm

✔ Includes 5 Sizes Screws: M3 x 6, M3 x 8, M3 x 10, M3 x 12, M3 x 16

✔ Includes 1 Pcs Hex Key, Hex Size 2.0 mm, to Drives These Screws Easily

✔ Material of Screws : Stainless Steel 304, High Strength and Anti-corrosion in Various Environments ✔ Material of Hex Key : Chrome-Vanadium Steel, Nickel Plated, Higher Strength and Anti-corrosion <br>

✔ Package : 250 Pcs M3 Hex Socket Drives Flat Head Cap Screws and 1 Pcs Hex Key, Come in an Easy-use Storage Case

#TOP3

Iexcell 200 Pcs M5 X 20/25/30/35/40 Stainless Steel 304 Hex Socket Button Head Cap Screws Bolts Nuts Assortment Kit

IEXCELL
BM5204054211
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
iexcell 9.85

Features

✔ Includes 100 Pcs, 5 Sizes, Hex Socket Button Head Cap Screws: M5 x 20, M5 x 25, M5 x 30, M5 x 35, M5 x 40

✔ Includes 100 Pcs M5 Nuts to Meet Different Applications

✔ Material of Screws and Nuts: Stainless Steel 304, High Strength And Anti-corrosion in Various Conditions

✔ Includes 1 Pcs Hex Key, Hex Size: 3.0 mm, Can Drive These Screws Conveniently and Easily;Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength And Anti-rust

✔ Package: All These Screws, Nuts and Hex Key Packed In a Sturdy Easy-use Storage Case, Organized Conveniently and Easily

#TOP4

Iexcell 100 Pcs M5 X 8/10/12/16/20 Stainless Steel 304 Hex Socket Button Head Cap Screws Bolts Assortment Kit

IEXCELL
BM508205421
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
iexcell 9.85

Features

✔ Includes 100 Pcs, 5 Sizes, M5 Hex Socket Button Head Cap Screws: M5 x 8, M5 x 10, M5 x 12, M5 x 16, M5 x 20, Thread Size ( Diameter ): 5 mm, Thread pitch: 0.8 mm, Thread Length from 8 mm to 20 mm

✔ Material of Screws: Stainless Steel 304, High Strength And Anti-corrosion in Various Conditions

✔ Includes 1 Pcs Hex Key , Hex Size: 3.0 mm, to Drive These Screws Conveniently and Easily

✔ Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength And Anti-rust

✔ Package: All These Screws and Hex Key Packed In a Sturdy Easy-use Plastic Storage Case, Organized Conveniently and Easily

Binifimux 10-Pack M6 X 15Mm Rivet Hex Socket Head Cap Bolt And Barrel Nut For Furniture

BINIFIMUX
CF-242
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
WindFly 9.77

Features

Pitch: 1.0mm; Color: Silver Nickel Plated; Weight: 90g

Bolt size: M6x15mm; Fix hex type: 4mm;

Nut thread: 6mm; Length:12mm;

Used for: bed, table, chair, workbench, boards, cabinets, cupboards, other furniture.

Glarks 100Pcs M6 X 35/45/55/65/75Mm Hex Drive Socket Cap Furniture Barrel Screws Bolt Nuts Assortment Kit For Furniture, Cots, Babybeds, Crib, Chairs - Nickel Plated

GLARKS
GLLADNJJ-2
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Connectors & Wire & Tools 9.90

Features

★ High Quality: The barrel nut and bolt in this set are made of high hardness and good toughness steel, with nickel plated on the surface makes it smooth without burrs, rust resistance and corrosion resistance allows you to use them for a long time

★ Package Include: It include 5 size of M6*35mm, M6*45mm, M6*55mm, M6*65mm, M6*75mm total 50pcs screw with 50pcs M6*12 barrel nuts in a clear box, convenient for your use

★ Perfect Match: These screws have a perfect match with barrel nuts to make strong joints for your furniture

★ Easy to Install: These screws with hex socket cap round head, you can just install them with a wrench, also easy to remove

★ Application: Best for the assembly of beds, and flat pack furniture, widely used for baby bed, table, chair, crib, cots, or workbench, boards, cabinets, cupboards, other furniture

Swpeet 120Pcs M6X16Mm/20Mm/25Mm/30Mm/35Mm Nickel Plated Sliver Hex Drive Socket Cap Bolts Barrel Nuts Kit With 1Pcs Allen Wrench, Screw Post Fit For Furniture Countsunk Belt Leather Binding Bolts

SWPEET
S1857
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Swpeet 9.86

Features

✿ 1, WHAT YOU GET ---- In this kit, You will get 120Pcs Nickel Plated Sliver Hex Drive Socket Cap Bolts Barrel Nuts Kit with 1Pcs Allen Wrench, Including M6x16mm: 25Pcs; M6x20mm: 15Pcs; M6x25mm: 10Pcs; M6x30mm: 10Pcs; M6x35mm: 10Pcs and M6x17 Nuts: 60Pcs. We now have a variety of sizes to choose from, you can choose whatever you need, which can fully meet your daily needs.

✿ 2, PRODUCT SIZE ---- Applicable Hole Dia:5/16"(8mm); Male Thread Size(Screw): M6 x 16mm(D*L); M6 x 20mm(D*L); M6 x 25mm(D*L); M6 x 30mm(D*L); M6 x 35mm(D*L); Female Thread Size(Top): M6 x 17mm(D*L). Threaded post lets you open and re-attach piece where needed.

✿ 3, HIGH QUALITY ---- Every barrel nut and bolt is Precision mechanical thread, made of high-quality Nickel Plated Sliver material, powder coating, anti-rust. Those have the performance of high hardness and good toughness, The screw thread is clear and not easy to loose. which make the kit more sturdy and durable.

✿ 4, WIDE APPLICATION ---- It is ideal for thin albums, decorative bags, leather belts, sandals, boots, leather bags, etc.Fit for all kinds of art and leather crafts and DIY clothing production. Also Used for: bed, table, chair, crib, or workbench, boards, cabinets, cupboards, other furniture.

✿ 5, EASY TO INSTALL ---- Threaded post lets you open and re-attach piece where needed. Make a hole larger than 0.5mm than the diameter of the nut rod, put screws and nuts on both sides of the locked object, and select the appropriate tool to lock it. Easily applied with standard screwdriver.

Swpeet 25Pcs M6X25Mm Nickel Plated Sliver Binding Screws Hex Drive Socket Cap Bolts Barrel Nuts Assortment Kit With 1Pcs Allen Wrench, Screw Post Fit For Furniture Countsunk Belt

SWPEET
S1860
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Swpeet 9.86

Features

✿ 1, WHAT YOU GET ---- In this kit, You will get 25Pcs Nickel Plated Sliver Hex Drive Socket Cap Bolts Barrel Nuts Kit with 1Pcs Allen Wrench, Including M6x25mm; 12Pcs and M6x17 Nuts: 12Pcs. We now have a variety of sizes to choose from, you can choose whatever you need, which can fully meet your daily needs.

✿ 2, PRODUCT SIZE ---- Applicable Hole Dia:5/16"(8mm); Male Thread Size(Screw): M6x16mm; M6x20mm; M6x25mm; M6x30mm; M6x35mm; M6x40mm; M6x45mm; M6x50mm; M6x55mm; M6x60mm; M6x65mm; M6x70mm; M6x75mm; M6x80mm and M6x17(D*L); Female Thread Size(Top): M6 x 17mm(D*L). Threaded post lets you open and re-attach piece where needed.

✿ 3, HIGH QUALITY ---- Every barrel nut and bolt is Precision mechanical thread, made of high-quality Nickel Plated material, black powder coating, anti-rust. Those have the performance of high hardness and good toughness, The screw thread is clear and not easy to loose. which make the kit more sturdy and durable.

✿ 4, WIDE APPLICATION ---- It is ideal for thin albums, decorative bags, leather belts, sandals, boots, leather bags, etc. Fit for all kinds of art and leather crafts and DIY clothing production. Also Used for: bed, table, chair, crib, or workbench, boards, cabinets, cupboards, other furniture.

✿ 5, EASY TO INSTALL ---- Threaded post lets you open and re-attach piece where needed. Make a hole larger than 0.5mm than the diameter of the nut rod, put screws and nuts on both sides of the locked object, and select the appropriate tool to lock it. Easily applied with standard screwdriver.

#TOP9

Iexcell 450 Pcs M4 X 6/8/10/12/16/20/25/30/35/40 Alloy Steel 10.9 Grade Hex Socket Button Head Cap Screws Bolts Nuts Assortment Kit, Black Oxide Finish

IEXCELL
M40640KN450
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
iexcell 9.85

Features

✔ Includes 225 Pcs, 10 Sizes, M4 Hex Socket Button Head Cap Screws, Thread Pitch 0.7 mm, Thread Size ( Diameter) 4 mm, Head Diameter 7.4 mm, Head Height 2.0 mm, Thread Length From 6 mm to 40 mm : M4 x 6, M4 x 8, M4 x 10, M4 x 12, M4 x 16, M4 x 20, M4 x 25, M4 x 30, M4 x 35, M4 x 40

✔ Strength Grade of Screws: 10.9 Grade, Tensile Strength: 1040 N/mm², Hardness: HRC 32-39; Material of Screws: Alloy Steel, Black Oxide Finish, High Strength And Anti-rust

✔ Includes 225 Pcs M4 Hex Nuts to Meet Different Applications, Material of Nuts: Alloy Steel, Black Oxide Finish

✔ Includes 1 Pcs Hex Key, Hex Size: 2.5 mm, to Drive These Screws Conveniently and Easily, Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength, Anti-rust

✔ Package: All These Screws, Nuts and Hex Key Packed In a Sturdy Easy-use Plastic Storage Case, Organized Conveniently and Easily

Uxcell M8X20Mm Hex Socket Head Insert Nut Screw Post Sleeve Nut For Furniture 10Pcs

UXCELL
A18072000UX0236
5.51 X 3.94 X 0.39 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
uxcell 9.95

Features

Female Thread Size: M8x20mm(D*L); Overall Height: 22.8mm / 0.9"; Sleeve Diameter: 10mm / 0.39"

Cap Size: 2.8 x 15.7mm / 0.11" x 0.62" (T*D); Hex Width(Fit for Wrench Size): 5mm / 0.2"

Material: Made of iron, nickel-plated to form a dense and stable oxide film, smooth, hard and durable.

Easy Installation: Hex socket head design allows repeated installation and removal with any standard screwdriver.

Application: It is an important fastener for connecting furniture parts, widely used in furniture assembly and maintenance, such as desks, chairs, beds, sofas, bookshelf, kitchen cupboards, etc.

Mardatt 141 Pcs 14 Size M6X16Mm-80Mm Silver Nickel Plated Hex Drive Socket Cap Bolts Assortment Kit With Hex Key Countersunk Screw Barrel Nuts Binding Screws For Crib Belt Buckle Cabinet Furniture

MARDATT
M496
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Masaile2020 9.85

Features

【M6 Furniture Cap Bolt Kit】Includes 141 pcs 14 different sizes Hex Socket Cap Bolts (M6 x 16mm 20mm 25mm 30mm 35mm 40mm 45mm 50mm 55mm 60mm 65mm 70mm 75mm 80mm, each is 5pcs) + 70pcs Barrel Nuts + 1pc Hex Key. With multiple lengths available, you can choose the perfect size to meet different needs. Comes with a durable plastic case with size label for convenient storage.

【Strong and Rustproof Material】The furniture bolts and barrel nuts are made of premium carbon steel material with nickel plated, high hardness, smooth and burr-free. The rust preventative silver nickel finishes ensure their good performance even in wet environment, which also give them a slightly glossy appearance.

【Selected Custom Set】These furniture hardware features standardized metric thread on both the female threaded barrel nuts & the male threaded bolts, clean, accurate and neat. Once installed, they won’t easy to out of shape or slid in the process of rolling.

【Installs in An Instant】--- Making a strong joint is a Breeze. Just drill a hole larger 0.5mm than the diameter of 8mm/0.31 inch barrel nuts caps, then these set easily installs with the included a hex key. Give them a try.

【Multipurpose Hardware】 No matter if you need it for DIY furniture project or as a replacement parts, our product will be your best helper. They are not only widely used in furniture like cribs, bed frame, chairs, cabinets,bookcases, wardrobes, workbench, ect, but also fit for all kinds of art and leather crafts and DIY clothing production, such as thin albums, decorative bags, leather belts, sandals, boots, leather bags binding and more.

Mardatt 85 Pcs 7 Size M6X20Mm-80Mm Nickel Plated Silver Hex Drive Socket Cap Bolts Assortment Kit With Hex Key Countersunk Screw Barrel Nuts Binding Screws For Crib Belt Buckle Cabinet Furniture

MARDATT
M512
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

【M6 Furniture Cap Bolt Kit】Includes 85 pcs 7 different sizes Hex Socket Cap Bolts (M6 x 20mm 30mm 40mm, 50mm 60mm,70mm, 80mm each is 6pcs) + 70pcs Barrel Nuts + 1pc Hex Key. With multiple lengths available, you can choose the perfect size to meet different needs. Comes with a durable plastic case with size label for convenient storage.

【Strong and Rustproof Material】The furniture bolts and barrel nuts are made of premium carbon steel material with nickel plated, high hardness, smooth and burr-free. The rust preventative silver nickel finishes ensure their good performance even in wet environment, which also give them a slightly glossy appearance.

【Selected Custom Set】These furniture hardware features standardized metric thread on both the female threaded barrel nuts & the male threaded bolts, clean, accurate and neat. Once installed, they won’t easy to out of shape or slid in the process of rolling.

【Installs in An Instant】--- Making a strong joint is a Breeze. Just drill a hole larger 0.5mm than the diameter of 8mm/0.31 inch barrel nuts caps, then these set easily installs with the included a hex key. Give them a try.

【Multipurpose Hardware】 No matter if you need it for DIY furniture project or as a replacement parts, our product will be your best helper. They are not only widely used in furniture like cribs, bed frame, chairs, cabinets,bookcases, wardrobes, workbench, ect, but also fit for all kinds of art and leather crafts and DIY clothing production, such as thin albums, decorative bags, leather belts, sandals, boots, leather bags binding and more.

#TOP13

M3-0.50 X 8Mm Socket Head Cap Screws, Allen Socket Drive, Din 912, Stainless Steel 304, Full Thread, Bright Finish, Machine Thread, Quantity 100 By Fastenere

FASTENERE
538006
4.00 X 1.00 X 6.00 Inches
0.18 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FASTENER DEPOT, LLC 9.76

Features

Thread Diameter 3 mm

Head Diameter 5.5 mm

Head Height 3 mm

Allen Hex Drive Size 2.5 mm

A2-70 stainless, which is a grade 304 stainless steel with a 700 N/mm2 tensile strength. The -70 represents the tensile strength divided by 10. Type 304 Stainless Steel is an austenitic steel possessing a minimum of 18% chromium and 8% nickel, combined with a maximum of 0.08% carbon. The 18% minimum chromium provides excellent corrosion and oxidation resistance.

32 Pair/64 Pcs Hex Drive Socket Cap Bolts With Barrel Nuts, M6X25 Mm Binding Post Screws With Connecting Bolts Nuts, Furniture Connector Binding Bolts Screws For Crib Baby Beds Purses Belt

BNNRJIA
TUS-003
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
baidun 7.17

Features

Premium Material: All furniture connector bolts are made of outstanding high strength nickel plated material with high stability, which are corrosion resistance and rust resistance, not easy to break, sturdy, and durable for long time use.

Easy to Install: Just insert the furniture screw into the hole on one end and insert the nuts to cover the screw on the other end, finally use the wrench tighten the bolts nuts. Threaded post lets you open and re-attach piece where needed.

Easy to Store: All binding post screws are packed in a sturdy and easy-to-use plastic storage box, which is not easy to mess up or mix up, and it is convenient and easy to organize and carry.

Wide Applications: The binding screws and bolts can connect furniture or parts together, and can be widely used in cabinets, furniture, wooden boards, cribs, workbenches, tables, and other usage scenarios.

Package Includes: You will receive 32 pcs hex drive socket cap screws, 32 pcs barrel nuts, 2 x allen wrench, and 1 x storage box. The screw thread is clear and not easy to loose, which make this kit more reliable.

#TOP15

M6-1.00 X 20Mm Button Head Socket Cap Screws, Allen Socket Drive, Iso 7380, Stainless Steel 18-8, Full Thread, Plain Finish, Flat Point, Quantity 50 By Fastenere

FASTENERE
4074698
3.00 X 1.00 X 6.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FASTENER DEPOT, LLC 9.77

Features

Socket cap machine screws are precision fasteners that are known for their quality and durability. They are designed to meet challenging fastening applications in a variety of industries such as construction, automotive, and product manufacturing. They are also known for their efficient application performance and endurance.

Button is low domed style head with a wide bearing surface that is perfect for use on applications in tight spaces.

Hex socket screw drive has a hexagonal recess and may be driven by a hex key or Allen wrench that allows for high torque wrenching in tight spaces.

The vast majority of stainless steel fasteners are produced with metals from the austenitic family. Their high levels of chromium and nickel provide tough corrosion resistance and the ability to withstand considerable physical strain without fracturing, albeit at a higher cost than the martensitic varieties.

Made of stainless steel grade 18-8 which offers a high level of chemical and corrosion resistance and strength that will out perform and out last all zinc plated fasteners for years with out the need to perform costly and time consuming maintenance.

Top 10 socket cap screws Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Iexcell 5
Fastenere 2
Mardatt 2
Swpeet 2
Binifimux 1
Bnnrjia 1
Glarks 1
Uxcell 1

Top 10 socket cap screws Brands Pie Chart


We've carried out a comprehensive analysis of 1,681 reviews on socket cap screws, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select socket cap screws priced around $11.21, with top brands including and

Our team of expert editors reviewed these high-quality items and handpicked the top 15 socket cap screws for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .

We are dedicated to assisting our users in finding the right screws Products based on their needs, saving them considerable time when choosing which socket cap screws to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.