Matrelt

45pcs 1/4-20 5 Sizes Countersunk Head Flat Socket Head Cap Screws Assortment Kit with Allen Keys, Black Grade 10.9 Carbon Steel Socket Cap Bolts Flat Countersunk Head Machine Screws

Name: 45pcs 1/4-20 5 Sizes Countersunk Head Flat Socket Head Cap Screws Assortment Kit with Allen Keys, Black Grade 10.9 Carbon Steel Socket Cap Bolts Flat
Brand: Matrelt
SKU: B0DY8FCFFP
Price: 8.79 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-07

$8.79

Buy on Amazon — $8.79 Compare to similar retro motherboards

*Price sourced from Amazon.com. Last updated 2026-07-07. Price and availability subject to change.

Bottom line: The 45pcs 1/4-20 5 Sizes Countersunk Head Flat Socket Head Cap Screws Assortment Kit with Allen Keys, Black Grade 10.9 Carbon Steel Socket Cap Bolts Flat Countersunk Head Machine Screws is a niche pick — read recent reviews before buying in the retro motherboards category, priced around $8.79. Read recent reviews carefully before committing.

Matrelt countersunk head, flat socket head cap screws with a low-profile, Use flat head screws for installation, the surface is aesthetically pleasing and flat, without protruding the screw head, perfect for a variety of applications that require a strong and reliable fastener.High-grade strong and hard carbon steel material provide exceptional strength, Clear and neat threads of these screws make it more aesthetic and ensure uniform force. Standard hexagon for easy installation, you won't have to worry about rust or wear and tear.This flat socket cap screws assortment set is complete in…

SpecPicks Verdict

SpecPicks classifies 45pcs 1/4-20 5 Sizes Countersunk Head Flat Socket Head Cap Screws… as a niche pick — read recent reviews before buying in the retro motherboards category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Matrelt's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for retro motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Backed by Matrelt's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

【Size and Quantity】-- Thread Diameter: 1/4-20"; Length: 3/8" 15pcs, 1/2" 12pcs, 3/4" 8pcs, 1" 6pcs, 1-1/2" 4pc. 45pcs 5 sizes black set screws and 1/4 allen keys assortment kit
【High-grade Material】--Made of grade 10.9 carbon steel, The advanced blackening process provides excellent corrosion resistance, deep thread, even pitch, smooth surface. Carbon steel composition allows them to withstand strong tensile forces So they will not strip or come out
【Wide Use】-- Flat socket cap screws perfect for connection fastening function, Suitable for indoor and outdoor applications. Widely used in mechanical equipment, precision machinery, mechanical mold,classified instruments, electronic products, classified instruments, bags, leather product, tables chairs furnitures, light fixtures
【Easy to Install】-- Flat head socket cap screw is a type of cap screw with a flat top surface. The hexagonal shape makes it easy to tighten and loosen the screws, even in hard-to-reach areas, Set screws assortment kit with allen key providing maximum convenience and efficiency.
【Portable & Storage】Flat countersunk head hex socket set screws packed in a delicate and transparent box, includes 5 sizes screws and allen keys suitable for different types of applications, you can easily store and find the size you need

Full Specifications

Brand	Matrelt
Color	Black
Material	Carbon Steel
Set Name	BLACK-5Size-1/4-45P
Head Type	Flat
Size Name	BLACK-5Size-1/4-45P
Head Style	Flat
Metal Type	Carbon Steel
Unit Count	45.0 Count
Part Number	MAT2025022501
Point Style	Flat Point
Thread Size	1/4-20
Thread Type	Unc
Drive System	External Hex

Ready to buy?

45pcs 1/4-20 5 Sizes Countersunk Head Flat Socket Head Cap Screws Assortment Kit with Allen Keys, Black Grade 10.9 Carbon Steel Socket Cap Bolts Flat Countersunk Head Machine Screws is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-07. Price and availability subject to change.