ALNsdo — BSW 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.
- 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: BSW (British Standard Whitworth).
| Part Number | d | Pitch (TPI) | S | h | m |
|---|---|---|---|---|---|
| ALNsdo420BSWCL8 | 1/4 | 20 | 0,445 | 0,270 | 0,175 |
| ALNsdo518BSWCL8 | 5/16 | 18 | 0,525 | 0,330 | 0,225 |
| ALNsdo616BSWCL8 | 3/8 | 16 | 0,600 | 0,400 | 0,285 |
| ALNsdo714BSWCL8 | 7/16 | 14 | 0,710 | 0,465 | 0,340 |
| ALNsdo813BSWCL8 | 1/2 | 13 | 0,820 | 0,550 | 0,410 |
| ALNsdo912BSWCL8 | 9/16 | 12 | 0,920 | 0,600 | 0,433 |
| ALNsdo1011BSWCL8 | 5/8 | 11 | 1,010 | 0,680 | 0,503 |
| ALNsdo1210BSWCL8 | 3/4 | 10 | 1,200 | 0,825 | 0,633 |
| ALNsdo1409BSWCL8 | 7/8 | 9 | 1,300 | 0,900 | 0,693 |
| ALNsdo1608BSWCL8 | 1 | 8 | 1,480 | 1,035 | 0,813 |
| ALNsdo1807BSWCL8 | 1 1/8 | 7 | 1,670 | 1,180 | 0,905 |
| ALNsdo2007BSWCL8 | 1 1/4 | 7 | 1,860 | 1,300 | 1,010 |
| ALNsdo2206BSWCL8 | 1 3/8 | 6 | 2,050 | 1,410 | 1,100 |
| ALNsdo2406BSWCL8 | 1 1/2 | 6 | 2,220 | 1,525 | 1,200 |
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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.