Is the metal plated for corrosion resistance? What kind of plating?

It definately has some sort of corrosion protection. Not quite sure if it's a light zinc or what hut thry are not corroding at my house and I live on the water.

will these casters fit the origami 6 tier bookshelf?

I’m not familiar with the origami 6 tier book shelf. Are there holes in the bottom to accommodate the threaded studs? They are very nice wheels!

Can the 1 1/2 inch screw be replaced by a longer screw?

The 1 1/2'' screw is a stud that is form to the bracket of the caster.. Hope this helps.

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HOLKIE Caster Wheels 3 inch Locking Stem Casters, 3/8" -16 x 1-1/2" (Stem Diameter 3/8", Stem Length 1-1/2") Threaded Stem Casters Swivel Casters Set of 4 Heavy Duty Castors, Gray Caster for Furniture

Product ID: 402739433

Details

Brand
HOLKIE
Colour
Gray
Item weight
1.3 Kilograms
Material
Thermoplastic
Mounting type
Stem Mount

🔄360° swivel for smooth maneuvering

🔒Side locking brake for secure stability

⚙️600 lbs max load capacity

€ 87.91

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Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Roll with confidence, lock with ease—mobility meets mastery.

LOCK IT DOWN - Side locking brakes keep your equipment firmly in place—no slips, no accidents.
HEAVY DUTY STRENGTH - Supports up to 600 lbs across 4 wheels—built to handle your toughest setups.
SEAMLESS 360 SWIVEL - Effortlessly glide and pivot with precision, adapting instantly to your workspace flow.
FLOOR FRIENDLY QUIET RIDE - Non-marring thermoplastic rubber wheels protect surfaces while rolling silently.
VERSATILE MOBILITY UPGRADE - Perfect for carts, workbenches, art tables, and more—turn any stationary gear into a mobile powerhouse.

The HOLKIE 3-inch locking stem casters combine heavy-duty steel housing and non-marring thermoplastic rubber wheels to deliver a robust 600 lb load capacity with smooth 360° swivel movement. Featuring side locking brakes for secure positioning and quiet, floor-protective rolling, this set of 4 casters is engineered for versatile use on furniture, carts, and workstations, backed by a 1-year warranty and 30-day money-back guarantee.

Specifications

ASIN	B09GFDSRMD
ASIN	B09GFDSRMD
Brand Name	HOLKIE
Caster Type	Stem
Color	Gray
Customer Reviews	4.7 4.7 out of 5 stars (2,343)
Customer reviews	4.7 4.7 out of 5 stars (2,343)
Date First Available	30 August 2021
Item Weight	1.3 Kilograms
Item model number	SGJL3G38
Load Capacity	600 pound
Manufacturer	HOLKIE
Manufacturer	HOLKIE
Material Type	Thermoplastic Rubber
Model	SGJL3G38
Mounting Type	Stem Mount
Package Dimensions	24.3 x 16.2 x 7.8 cm; 1.3 kg
Part Number	SGJL3G38
Surface Recommendation	Hard Floor
UPC	795276999652
Wheel Width	2 Inches

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€ 87.91

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered 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 Cyprus.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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2 weeks ago

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