Stainless Steel Slotted Nut - Grade 202, 304, 316, A2, A2-70
A slotted nut, also known as a castle nut, features slots on one end and is intended for use with a cotter pin or wire to ensure secure locking. Once the nut is tightened onto a pre-drilled bolt or threaded rod and aligned with the hole, the cotter pin is inserted to prevent any loosening or rotating. This locking method is essential in scenarios where movement or vibration may cause a standard nut to become loose.
Slotted Nuts Technical Specification
| Specification | Details |
| Standards | DIN 935, ISO 7038, IS 2232 |
| Sizes Available | M6 to M48 (Metric), 1/4" to 2" (Inch) |
| Thread Types | Metric, UNC, UNF |
| Slot Types | Six or more vertical slots |
| Torque Requirement | Moderate; secured with mechanical locking |
- Slots (notches) on one end to accommodate a cotter pin
- Used with drilled bolts or axles for secure locking
- Prevents loosening in high-vibration or rotating applications
- Typically used with a split pin, cotter pin, or locking wire
- Available in standard hex or castle-type with a rounded crown
| Material | Grade | Applications |
| Carbon Steel | Grade 4, 6, 8 | General engineering and automotive use |
| Stainless Steel A2 | A2-70, A2-80 | Corrosion-resistant applications |
| Stainless Steel A4 | A2-70, A2-80 | Marine, chemical industries |
| Brass | - | Electrical, light-duty, anti-corrosive use |
| Alloy Steel | Grade 10.9, 12.9 | High-strength applications |
Slotted nuts, also known as castle nuts or castellated nuts, are hexagonal nuts with slots cut into one end. These slots allow the nut to be secured with a cotter pin through a drilled bolt, ensuring the nut doesn’t loosen due to vibration or dynamic load.
Material
Stainless Steel A2
Grade
A2-70, A2-80
Tensile Strength
500–700 MPa
Standards
500–700 MPa
Let’s Work Together
Send us a message to have all your questions answered about Slotted Nuts
