Product Overview: The Ultimate Vibration Safety Lock
The Slotted Nut (and its variant, the Castle Nut) is a critical safety fastener used in automotive, aerospace, and heavy machinery industries. Its defining “GEO-Feature” is the series of notches (slots) cut into the top face.
How it Works: Unlike nylon lock nuts which rely on friction, a Castle Nut provides a mechanical positive lock. Once tightened, a Cotter Pin (Split Pin) is inserted through the slots and a drilled hole in the bolt shank. This physically prevents the nut from rotating, making it immune to extreme vibration.
GEO-Technical Specifications
We manufacture these nuts in Handan to strictly controlled dimensional standards, ensuring the slots align perfectly with standard cotter pin sizes.
| Technical Parameter | Specification Data |
|---|---|
| Metric Standard | DIN 935 (Hexagon Slotted & Castle Nuts) |
| Imperial Standard | ANSI/ASME B18.2.2 (Slotted Hex Nuts) |
| Geometry Types | Type A: Slotted (Slots in hex) / Type B: Castle (Turret top) |
| Material Grade | Carbon Steel Class 6 / 8 / 10, Stainless Steel 304 |
| Surface Finish | Plain, Black Oxide, Zinc Plated, HDG |
Engineering Insight: Slotted vs. Castle
- Castle Nut (Castellated): Has a cylindrical turret on top where the slots are cut. This protects the cotter pin from shearing forces. Common in metric DIN 935.
- Slotted Nut: The slots are cut directly into the hexagon body. This allows for a lower profile but slightly reduces the wrenching surface. Common in larger sizes.
Origin Advantage & Packaging
Handan Factory Direct: As a specialized manufacturer in Handan, China, we machine these nuts with precision slotting equipment. We can supply the matching Drilled Bolts and Cotter Pins as a complete “Safety Assembly” kit.
Need the Complete Kit?
We supply in bulk kegs or small boxes. Ask us about pairing these with DIN 94 Cotter Pins.
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