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Lock Nuts – Secure Fastening Solutions Built to Last

Here at BEP Ltd, we offer a selection of lock nuts that achieve this goal as well, eradicating the risks of vibration vibrations which can cause problems to equipment driven by torques and external fiords. For automotive, industrial or structural application lock nuts, our range that includes nyloc nuts and all-metal NutLocks provides the strength engineers expect.

What Makes Lock Nuts Different?

Locking nuts, also referred to as locknuts, prevailing torque nuts or self-locking nuts, are designed to remain securely fastened under conditions that would cause a normal nut to loosen.

They usually operate by requiring prevailing torque during installation that generally comes in the form of deformed threads, inserts or serrated surfaces which bite into the mating bolt.

Lock Nut Types & Use Cases

Type

How It Locks

Best For

Nylon-insert (Nyloc)

Nylon ring creates friction with threads

General use; up to ~250°F

Distorted-thread

Deformed threads press against bolt threads

High-temperature, reusable

Serrated Flange

Angled ridges bite into surface

Prevents rotation; no washer needed

Security Locknut

Steel ring applies clamping friction and load isolation

Heavy vibration and rail applications

Split-beam / Stover

Slotted top sections expand to grip threads

High-temp, reusable up to ~1400°F


Why Choose BEP’s Lock Nut Range?

  • Expertly Selected Inventory – We stock high-quality prevailing torque, Nyloc, all-metal, and security lock nuts.
  • Trusted in High-Stress Environments – Ideal for automotive, aerospace, oil & gas, and heavy machinery applications (where failure isn’t an option) 
  • UK-Based Distribution – Fast dispatch, excellent customer service, and available for bulk or OEM orders.
  • Companion Support – Not sure which lock nut you need? Our technical team is ready to guide you through material, size, and environment matchups.

Frequently Asked Questions (FAQs)

Q1. What is a lock nut, and how is it different from a regular nut?

A lock nut resists loosening under vibration, using features like elastic deformation or surface interference, unlike standard nuts that rely on external aids like thread-lock fluid 

Q2. When should I choose a Nyloc nut?

Use for general applications, especially involving moderate vibration and temperatures up to ~250°F. Not recommended for extreme heat or repeated re-use 

Q3. What are all-metal lock nuts used for?

They're ideal for high-temperature, harsh environments where reusable and low-failure lock nuts are needed—from automotive to industrial across wide temperature ranges 

Q4. Can security locknuts be reused?

Yes. Their resilient steel lock ring design ensures consistent locking torque over repeated cycles—perfect for systems where disassembly and reassembly are routine 

Lock Nuts

Lock Nuts – Secure Fastening Solutions Built to Last

Here at BEP Ltd, we offer a selection of lock nuts that achieve this goal as well, eradicating the risks of vibration vibrations which can cause problems to equipment driven by torques and external fiords. For automotive, industrial or structural application lock nuts, our range that includes nyloc nuts and all-metal NutLocks provides the strength engineers expect.

What Makes Lock Nuts Different?

Locking nuts, also referred to as locknuts, prevailing torque nuts or self-locking nuts, are designed to remain securely fastened under conditions that would cause a normal nut to loosen.

They usually operate by requiring prevailing torque during installation that generally comes in the form of deformed threads, inserts or serrated surfaces which bite into the mating bolt.

Lock Nut Types & Use Cases

Type

How It Locks

Best For

Nylon-insert (Nyloc)

Nylon ring creates friction with threads

General use; up to ~250°F

Distorted-thread

Deformed threads press against bolt threads

High-temperature, reusable

Serrated Flange

Angled ridges bite into surface

Prevents rotation; no washer needed

Security Locknut

Steel ring applies clamping friction and load isolation

Heavy vibration and rail applications

Split-beam / Stover

Slotted top sections expand to grip threads

High-temp, reusable up to ~1400°F


Why Choose BEP’s Lock Nut Range?

  • Expertly Selected Inventory – We stock high-quality prevailing torque, Nyloc, all-metal, and security lock nuts.
  • Trusted in High-Stress Environments – Ideal for automotive, aerospace, oil & gas, and heavy machinery applications (where failure isn’t an option) 
  • UK-Based Distribution – Fast dispatch, excellent customer service, and available for bulk or OEM orders.
  • Companion Support – Not sure which lock nut you need? Our technical team is ready to guide you through material, size, and environment matchups.

Frequently Asked Questions (FAQs)

Q1. What is a lock nut, and how is it different from a regular nut?

A lock nut resists loosening under vibration, using features like elastic deformation or surface interference, unlike standard nuts that rely on external aids like thread-lock fluid 

Q2. When should I choose a Nyloc nut?

Use for general applications, especially involving moderate vibration and temperatures up to ~250°F. Not recommended for extreme heat or repeated re-use 

Q3. What are all-metal lock nuts used for?

They're ideal for high-temperature, harsh environments where reusable and low-failure lock nuts are needed—from automotive to industrial across wide temperature ranges 

Q4. Can security locknuts be reused?

Yes. Their resilient steel lock ring design ensures consistent locking torque over repeated cycles—perfect for systems where disassembly and reassembly are routine 

KMTA13 80x88x25mm SKF Lock Nut

£109.22 - £109.22
£109.22
£109.22 - £109.22
£109.22

KMTA13 80x88x25mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£109.22 - £109.22
£109.22
£109.22 - £109.22
£109.22

KMTA11 70x75x24mm SKF Lock Nut

£79.68 - £79.68
£79.68
£79.68 - £79.68
£79.68

KMTA11 70x75x24mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£79.68 - £79.68
£79.68
£79.68 - £79.68
£79.68

KMTA12 75x84x24mm SKF Lock Nut

£89.40 - £89.40
£89.40
£89.40 - £89.40
£89.40

KMTA12 75x84x24mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£89.40 - £89.40
£89.40
£89.40 - £89.40
£89.40

KMTA10 63x70x24mm SKF Lock Nut

£72.72 - £72.72
£72.72
£72.72 - £72.72
£72.72

KMTA10 63x70x24mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£72.72 - £72.72
£72.72
£72.72 - £72.72
£72.72

KMT9 64x70x22mm SKF Lock Nut

£59.24 - £59.24
£59.24
£59.24 - £59.24
£59.24

KMT9 64x70x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£59.24 - £59.24
£59.24
£59.24 - £59.24
£59.24

KMT8 59x65x22mm SKF Lock Nut

£56.15 - £56.15
£56.15
£56.15 - £56.15
£56.15

KMT8 59x65x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£56.15 - £56.15
£56.15
£56.15 - £56.15
£56.15

KMT7 49x54x22mm SKF Lock Nut

£53.11 - £53.11
£53.11
£53.11 - £53.11
£53.11

KMT7 49x54x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£53.11 - £53.11
£53.11
£53.11 - £53.11
£53.11

KMT6 44x49x20mm SKF Lock Nut

£50.68 - £50.68
£50.68
£50.68 - £50.68
£50.68

KMT6 44x49x20mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£50.68 - £50.68
£50.68
£50.68 - £50.68
£50.68

KMT5 39x44x20mm SKF Lock Nut

£49.45 - £49.45
£49.45
£49.45 - £49.45
£49.45

KMT5 39x44x20mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£49.45 - £49.45
£49.45
£49.45 - £49.45
£49.45

KMT40 224x235x32mm SKF Lock Nut

£430.99 - £430.99
£430.99
£430.99 - £430.99
£430.99

KMT40 224x235x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£430.99 - £430.99
£430.99
£430.99 - £430.99
£430.99

KMT4 35x40x18mm SKF Lock Nut

£48.31 - £48.31
£48.31
£48.31 - £48.31
£48.31

KMT4 35x40x18mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£48.31 - £48.31
£48.31
£48.31 - £48.31
£48.31

KMT38 214x225x32mm SKF Lock Nut

£418.05 - £418.05
£418.05
£418.05 - £418.05
£418.05

KMT38 214x225x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£418.05 - £418.05
£418.05
£418.05 - £418.05
£418.05

KMT36 204x215x32mm SKF Lock Nut

£361.19 - £361.19
£361.19
£361.19 - £361.19
£361.19

KMT36 204x215x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£361.19 - £361.19
£361.19
£361.19 - £361.19
£361.19

KMT34 192x205x32mm SKF Lock Nut

£340.46 - £340.46
£340.46
£340.46 - £340.46
£340.46

KMT34 192x205x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£340.46 - £340.46
£340.46
£340.46 - £340.46
£340.46

KMT32 184x195x32mm SKF Lock Nut

£324.42 - £324.42
£324.42
£324.42 - £324.42
£324.42

KMT32 184x195x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£324.42 - £324.42
£324.42
£324.42 - £324.42
£324.42

KMT30 174x185x32mm SKF Lock Nut

£279.16 - £279.16
£279.16
£279.16 - £279.16
£279.16

KMT30 174x185x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£279.16 - £279.16
£279.16
£279.16 - £279.16
£279.16

KMT3 33x37x18mm SKF Lock Nut

£46.13 - £46.13
£46.13
£46.13 - £46.13
£46.13

KMT3 33x37x18mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£46.13 - £46.13
£46.13
£46.13 - £46.13
£46.13

KMT26 154x165x32mm SKF Lock Nut

£232.07 - £232.07
£232.07
£232.07 - £232.07
£232.07

KMT26 154x165x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£232.07 - £232.07
£232.07
£232.07 - £232.07
£232.07

KMT28 164x175x32mm SKF Lock Nut

£265.01 - £265.01
£265.01
£265.01 - £265.01
£265.01

KMT28 164x175x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£265.01 - £265.01
£265.01
£265.01 - £265.01
£265.01

KMT24 144x155x32mm SKF Lock Nut

£182.93 - £182.93
£182.93
£182.93 - £182.93
£182.93

KMT24 144x155x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£182.93 - £182.93
£182.93
£182.93 - £182.93
£182.93

KMT22 134x145x32mm SKF Lock Nut

£170.86 - £170.86
£170.86
£170.86 - £170.86
£170.86

KMT22 134x145x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£170.86 - £170.86
£170.86
£170.86 - £170.86
£170.86

KMT20 125x135x32mm SKF Lock Nut

£164.77 - £164.77
£164.77
£164.77 - £164.77
£164.77

KMT20 125x135x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£164.77 - £164.77
£164.77
£164.77 - £164.77
£164.77

KMT2 28x33x16mm SKF Lock Nut

£70.03 - £70.03
£70.03
£70.03 - £70.03
£70.03

KMT2 28x33x16mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£70.03 - £70.03
£70.03
£70.03 - £70.03
£70.03

KMT19 120x130x32mm SKF Lock Nut

£171.40 - £171.40
£171.40
£171.40 - £171.40
£171.40

KMT19 120x130x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£171.40 - £171.40
£171.40
£171.40 - £171.40
£171.40

Hi. Need any help?