what size fits a 1/2" shaft on a toy wagon?

Maximum diameter in that set is 7/16". Nothing in that set will fit a 1/2" shaft.

Does this case include something similar to a lock washer that would fit a 5/8 inch axle rod?

Not 5/8 “,probably more like 1/2 “

Are these rust proof?

Not sure made with carbon steel they look like they have a coating on them to prevent rusting ...

Would M6 be too tight for 1/4" ?

M6 is 6mm ; 1/4 is 6.35mm, I consider it an appropriate tolerance to use it as described

Glarks 280Pcs Internal Tooth Starlock Push On Locking Washers Speed Clips Fasteners Assortment Kit

Glarks 280Pcs Internal Tooth Starlock Push On Locking Washers Speed Clips Fasteners Assortment Kit

Product ID: 277862335

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Details

Exterior finish
Stainless
Fastener size
M3 M4 M5 M6 M8
Material
Medium Carbon
Outside diameter
12 Millimeters
Washer type
Internal Tooth

🔩7 sizes M3-M12

⚙️280pcs versatile kit

🛡️65Mn steel durability

Description

🔧 Lock in reliability, unlock your project’s potential!

BUILT TO LAST - Crafted from premium 65Mn carbon steel ensuring unmatched strength and corrosion resistance.
ALL IN ONE PRECISION KIT - 280 high-quality starlock washers covering 7 essential sizes for every fastening need.
ORGANIZED READY TO USE - Comes in a transparent, compartmentalized box for quick access and efficient workflow.
VERSATILE INDUSTRIAL USE - Ideal for shock absorption and insulation across machinery and heavy-duty equipment.
ENHANCED GRIP STABILITY - Internal tooth design delivers superior friction and rotation resistance for secure assemblies.

The Glarks 280Pcs Internal Tooth Starlock Push On Locking Washers Kit offers a comprehensive assortment of durable, high-precision washers made from 65Mn carbon steel. Featuring 7 sizes from M3 to M12, this kit ensures enhanced friction and resistance to rotation, making it perfect for industrial machinery applications requiring shock absorption and insulation. Packaged in a transparent organizer, it’s designed for professionals who demand reliability and efficiency.

Specifications

ASIN	B076D3FZM4
Best Sellers Rank	#72,179 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #162 in Hardware Washers
Brand	Glarks
Compatible Groove Diameter	12 Millimeters
Customer Reviews	4.5 4.5 out of 5 stars (787)
Exterior Finish	Stainless Steel
Fastener Size	M3, M4, M5, M6, M8, M10, M12
Fastener Type	Internal Tooth Lock
Finish Types	Matte Black
Global Trade Identification Number	00709886212018
Grade Rating	High quality
Item Weight	0.19 Kilograms
Manufacturer	Glarks
Material Type	Medium Carbon Steel
Metal Type	Carbon Steel
Model	GLALW-2
Number of Pieces	280
Outside Diameter	12 Millimeters
Part Number	GLALW-2
Screw Head Style	Starlock
Size Name	12 millimeters
Thread Size	M3, M4, M5, M6, M8, M10, M12
UPC	709886212018
Washer Type	Internal Tooth Lock

Reviews

H**R

Good quality

24.10.2025

G**B

Excelente producto era lo que esperaba y necesitaba, Saludos

5.04.2025

M**O

Ottimo

17.03.2026

D**C

Très bien, grand choix, bonne qualité mais pas de bol pas la taille qu'il me faut actuellement.

5.09.2025

T**E

Cheap and does the job perfectly

7.11.2025

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