Double Slotted Nuts — Opposite (ALNsdo) Class 8
Steel Class 8 all-metal prevailing-torque nuts with opposite slots for smooth engagement, low prevailing torque, and reliable re-use.
Material Grade: Steel Class 8 (hardness per ISO 898-2)
Material Finish: Zinc & Yellow (RoHS)
Performance: Prevailing torque as per ISO 2320
Compliance: RoHS conformant
- Low prevailing torque for easier assembly and repeatability
- Reusable across ISO 2320 cycles (1st turn, 1st & 5th removal)
- All-metal design — unaffected by chemicals or temperature
- Thread families available: Metric, UNC, UNF, BSW, BSF
Select Your Thread Family
Installation note
Prevailing torque is the nut’s built-in resistance and is separate from your joint’s tightening torque. Use installation torque from your engineering spec (bolt size, property class, lubrication) and verify prevailing-torque compliance to ISO 2320.