What is Slotted Nuts?
Nuts with multiple slot on all sides are called slotted nuts. This design requires the use of special cotter pins or lock washers, which effectively prevent the nut from automatically loosening under vibration or alternating loads. Therefore, it is also called slot lock nut.
Types of slotted nuts
Common slotted nuts include hex slotted nuts, round groove nuts, t-groove nuts, etc. There are also some nuts with special structures, which we can customize before you provide drawings.
It adds a slotted design to the hex nut, also called castle nut or castellated locking nut.
Standard: DIN 935 DIN 937 DIN 979
Size: M6-M64

Also called a round grooved nut, it has only two slots at the bottom.
Standard: DIN 546
Size: M3-M12

It is an oblate structure with several slots on the sides.
Standard: DIN 1804
Size: M10-M200
Also called t slot nuts or t sliding nut, it is mainly used for aluminum profiles or accessories with t-slot structure.
Standard: DIN 508
Size: M3-M10
Various parameters of slotted nuts
- Surface Treatment
- Materials
- Slotted nuts grade
- Our certificate
- Customer Feedback
Plain, Galvanized, HDG, Nickel Plated, Copper plating, black oxidation, passivation, polishing, power coated and so on
Aluminum , Zinc alloy, carbon steel , 304 Stainless Steel, 316 Stainless Steel, Copper, Brass
Grade 4, Grade 5, Grade 6, Grade 8, Grade 10, Grade 12, 2H
A2-70, A4-80
We not only have the necessary ISO and CE certification certificates in the industry, these certificates fully prove our international standardization level in product quality and management system. At the same time, we have also won a number of highly important honorary certificates, including China Integrity Entrepreneur, Service and Promise, Quality and Promise, Contract and Promise, and Quality and Service Integrity.


Castle nut usually refers to a hex slotted nut, and a Slotted nut is a general term for all nuts with a slot structure.
For the T&Y hardware industry, standard samples are free charge ,for new customers ,we required to pay for freight ,and charge will return after order confirm
For Standard carbon steel and stainless steel slotted nuts, T&Y hardware processing time is in 10-15 days after confirming the order, if for special 316 stainless steel or brass slot nuts , will last 25-30 days
We usually keep stock for standard items ,If not special items , No MOQ required













