ALNsdo — UNF Class 8 (Double-Slotted All-Metal Lock Nuts, Opposite Slots)
Steel Class 8 prevailing-torque nuts (ISO 2320) with opposite slots for consistent locking performance and re-use. Clear Zinc (RoHS) finish as standard. UNF (Unified Fine) thread.
- Material grade: Steel Class 8 (proof load & hardness per ISO 898-2).
- Finish: Clear Zinc (RoHS conformant).
- Performance: Prevailing-torque compliant with ISO 2320.
- Thread standard: UNF (Unified Fine).
| Part Number | d | Pitch (TPI) | S | h | m |
|---|---|---|---|---|---|
| ALNsdo1032FCL8 | n° 10 | 32 | 0,344 | 0,267 | 0,174 |
| ALNsdo428FCL8 | 1/4 | 28 | 0,437 | 0,270 | 0,175 |
| ALNsdo524FCL8 | 5/16 | 24 | 0,500 | 0,330 | 0,225 |
| ALNsdo624FCL8 | 3/8 | 24 | 0,562 | 0,400 | 0,285 |
| ALNsdo720FCL8 | 7/16 | 20 | 0,687 | 0,480 | 0,345 |
| ALNsdo820FCL8 | 1/2 | 20 | 0,750 | 0,546 | 0,395 |
| ALNsdo918FCL8 | 9/16 | 18 | 0,875 | 0,600 | 0,438 |
| ALNsdo1018FCL8 | 5/8 | 18 | 0,937 | 0,672 | 0,503 |
| ALNsdo1216FCL8 | 3/4 | 16 | 1,125 | 0,785 | 0,593 |
| ALNsdo1414FCL8 | 7/8 | 14 | 1,312 | 0,913 | 0,698 |
| ALNsdo1612FCL8 | 1 | 12 | 1,500 | 1,032 | 0,788 |
| ALNsdo1812FCL8 | 1 1/8 | 12 | 1,687 | 1,160 | 0,897 |
| ALNsdo2012FCL8 | 1 1/4 | 12 | 1,875 | 1,280 | 1,000 |
| ALNsdo2212FCL8 | 1 3/8 | 12 | 2,062 | 1,400 | 1,105 |
| ALNsdo2412FCL8 | 1 1/2 | 12 | 2,250 | 1,530 | 1,210 |
Scroll horizontally →
Available on request: different finish grades, additional sizes, and other steel grades.
USA Grade 5 nut strength is similar to European metric Class 8. Verify specification, torque, and material for flight- or safety-critical applications.