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 simmonds_nuts
Prevailing torque
Slotted Deformed
Characteristics / Nut type simmonds
NYLSTOP
snep_bwSlotted nut
type ESN
snep_bwSlotted nut
type DAH
simmonds
MHT
simmonds
PH
simmonds
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