What kind of plastic are these? pla, abs, or pteg?

PLA, ABS or PTEG ain't going to cut it I'm afraid. While the bags are PTEG, the Rackstuds are made of Grivory, a metal replacement plastic often found in car door handles and wiper blade arms.

Which version of rackstuds will fit the startech 4u 19" desktop open frame rack?

Sadly the holes on some of the Startech racks are too small for Rackstuds. Search Google for our post on this using Rackstuds and Startech as the keywords. You could try a sample pack that has both sizes/colors to test first if you like.

are the samples the same quality materials as the actual 100 Pack ? Or they are just guide for figuring out the sizes

Thanks for your question. The samples are production parts and fit for field use. They just contain both sizes/colors along with eight nuts; four in black and four in turquoise so you can determine which size fits your rack best. In saying that, the new Series II Maroon studs fit 70~80% of the rails in the market.

any reason why I should use the yellow lockwasher? It's hard for me to get them close together when I use those

Yes, because it's designed to hold the Rackstud in an open position so it doesn't fall through the hole. Just insert the Rackstud, place the yellow lockwasher on the correct way with the little extra bit facing the rack/Rackstud, mount your gear and then tighten the screw. It will force the little yellow bit in place. If you can't tighten it enough by hand use a screwdriver the first time to ensure proper seating of the yellow lockwasher.

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Rackstuds 4C Rack Mount Solution II - Sample Pack 4 of Each Size | Includes Both Red (2.2 mm) and Purple (3.2 mm) Studs | The Complete Solution for Any 19" Racks with Square Punched Vertical Rails

Rackstuds 4C Rack Mount Solution II - Sample Pack 4 of Each Size | Includes Both Red (2.2 mm) and Purple (3.2 mm) Studs | The Complete Solution for Any 19" Racks with Square Punched Vertical Rails

Product ID: 471664578

Details

Color
Yellow
Exterior Finish
Natural
Fastener Type
Lock
Material
Grivory
Thread Size
M10

⚡30% faster installation

🔴Red studs fit rails ≤2.2mm

🟣Purple studs fit rails 2.7-3.2mm

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€ 21.28

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Description

🚀 Mount Smarter, Not Harder — The Future of Rack Installation is Here!

BUILT TO ENDURE - High-strength, automotive-grade plastic resists heat, impact, and wear for reliable, long-term use.
ONE HANDED MASTERY - Secure your gear single-handedly—no more juggling heavy equipment during installation.
SPEED UP YOUR SETUP - Eliminate cage nuts and install racks 30% faster with front-access Rackstuds.
TEST BEFORE YOU COMMIT - Sample pack with redesigned PZ2 nut slot lets you try both sizes for effortless, faster mounting.
UNIVERSAL FIT ZERO GUESSWORK - Includes red and purple studs to perfectly match any 19" square punched rail thickness.

The Rackstuds 4C Rack Mount Solution II Sample Pack revolutionizes 19" rack mounting by replacing traditional cage nuts with front-install studs that speed up installation by 30%. Featuring both red (2.2mm) and purple (3.2mm) studs, it ensures perfect compatibility with all common square punched rails. Made from durable, non-conductive automotive-grade plastic, Rackstuds enable secure, single-handed mounting with a redesigned PZ2 nut for faster tightening and removal. Ideal for IT, pro A/V, and industrial racks, this pack lets professionals test fit before upgrading their entire setup.

Reviews

N**U

neu

Alles bestens

5.03.2026

N**T

tres pratique

C'est vraiment bien pensé ! Je recommande a 100%

9.12.2024

B**O

Cómodo, rápido y práctico

Por fin un sistema para trabajar en racks sin dejarte las uñas y los dedos y pudiendo trabajar uno solo sin ayuda: colocas los cuatro Rackstuds del dispositivo que quieras montar en el rack, insertas el dispositivo y ya sólo tienes apretar las "tuercas" de cierre sin hacer malabarismos sujetando el dispositivo. Ahora ya sólo falta que bajen de precio y adiós a los tradicionales tornillos con tuerca de rack.

11.03.2022

H**U

Legit stuff, works 5/5

30.11.2022

A**R

Potentially weak, easily stripped using screwdriver.

3.01.2026

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€ 21.28

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Finland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Package Dimensions	11.91 x 6.3 x 2.11 cm; 32 Grams
Manufacturer reference	RSL4C-S2
Brand	Rackstuds
Manufacturer	Rack Studs Limited

Rackstuds 4C Rack Mount Solution II - Sample Pack 4 of Each Size | Includes Both Red (2.2 mm) and Purple (3.2 mm) Studs | The Complete Solution for Any 19" Racks with Square Punched Vertical Rails

Details

Details

Description

Specifications

Reviews

Common Questions