Simmonds Self Locking Nuts
There are many situations where it is beneficial to use a locking nut over a standard nut.
Whatever fastening problem you're looking to overcome from vibration resistance to extreme temperature resistance a high strength lock nut from our Simmonds standard range should provide the solution. If not, we have the engineering capability to produce a solution specific to your requirements.
| NYLON RING NUTS | FULL METAL NUTS |  |
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| Prevailing torque | |||||||
| Slotted | Deformed | ||||||
| Characteristics / Nut type |  NYLSTOP |
 Slotted nuttype ESN |
Slotted nut type DAH |
MHT |
PH |
DHE |
|
| Standard diameter range | M2,5 - M52 | M4 - M27 | M4 - M27 | M5 - M20 | M3 - M12 | M4 - M24 | |
| Reusability | 15 x min | 5 x min | 5 x min | 15 x min | 15 x min | 15 x min | |
| T° range for standard versions | Max 140°C | -40°C - 280°C | -40°C - 280°C | -40°C - 280°C | -40°C - 480°C | -40°C - 480°C | |
| Resistance class for standard versions |
Class 8 & 10 Steel A2 & A4 Stainless Steel |
Class 6, 8 A2 & A4 Stainless Steel |
Class 8 & 10 A2 & A4 Stainless Steel |
Class 8 Steel | CRES A286 Stainless Steel - 1100 Mpa |
CRES A286 Stainless Steel Alloy Steel 30CD4 |
|
| Surface treatment (in standard versions) |
Zinc Nickel | Steel: White Zinc Plated Stainless Steel: STAL BHT |
Steel: White Zinc Plated Stainless Steel: STAL |
Zinc Nickel | Silver plating | Silver plating | |
| Locking performance | Medium to strong | Medium to strong | Strong | Strong | Very strong | Very strong | |
| Automatic installation | Yes | Not for H130 | Yes | Yes | Yes | Yes | |
| Flange/washer? | Yes | No | Yes | No | Yes | Yes | |
| Prevailing torque | Yes | Yes | Yes | Yes | Yes | Yes | |
| Low versions? | Yes | Yes | No | No | No | No | |
| Certifications | SNCF ISO2320 |
SNCF ISO2320 |
SNCF ISO2320 |
SNCF ISO2320 |
AERO | AERO | |