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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 

KMFE17 98x110x19mm SKF Lock Nut

£43.81 - £43.81
£43.81
£43.81 - £43.81
£43.81

KMFE17 98x110x19mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£43.81 - £43.81
£43.81
£43.81 - £43.81
£43.81

KMFE16 91.5x105x18mm SKF Lock Nut

£39.37 - £39.37
£39.37
£39.37 - £39.37
£39.37

KMFE16 91.5x105x18mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£39.37 - £39.37
£39.37
£39.37 - £39.37
£39.37

KMFE15 85x98x16mm SKF Lock Nut

£36.05 - £36.05
£36.05
£36.05 - £36.05
£36.05

KMFE15 85x98x16mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£36.05 - £36.05
£36.05
£36.05 - £36.05
£36.05

KMFE14 79x92x15mm SKF Lock Nut

£33.01 - £33.01
£33.01
£33.01 - £33.01
£33.01

KMFE14 79x92x15mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£33.01 - £33.01
£33.01
£33.01 - £33.01
£33.01

KM9 56x65x10mm SKF Lock Nut

£9.01 - £9.01
£9.01
£9.01 - £9.01
£9.01

KM9 56x65x10mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£9.01 - £9.01
£9.01
£9.01 - £9.01
£9.01

KM8 50x58x9mm SKF Lock Nut

£8.53 - £8.53
£8.53
£8.53 - £8.53
£8.53

KM8 50x58x9mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£8.53 - £8.53
£8.53
£8.53 - £8.53
£8.53

KM7 44x52x8mm SKF Lock Nut

£8.39 - £8.39
£8.39
£8.39 - £8.39
£8.39

KM7 44x52x8mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£8.39 - £8.39
£8.39
£8.39 - £8.39
£8.39

KM40 226x250x29mm SKF Lock Nut

£196.04 - £196.04
£196.04
£196.04 - £196.04
£196.04

KM40 226x250x29mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£196.04 - £196.04
£196.04
£196.04 - £196.04
£196.04

KM4 26x32x6mm SKF Lock Nut

£6.33 - £6.33
£6.33
£6.33 - £6.33
£6.33

KM4 26x32x6mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£6.33 - £6.33
£6.33
£6.33 - £6.33
£6.33

KM38 214x240x28mm SKF Lock Nut

£146.61 - £146.61
£146.61
£146.61 - £146.61
£146.61

KM38 214x240x28mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£146.61 - £146.61
£146.61
£146.61 - £146.61
£146.61

KM36 203x230x27mm SKF Lock Nut

£135.57 - £135.57
£135.57
£135.57 - £135.57
£135.57

KM36 203x230x27mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£135.57 - £135.57
£135.57
£135.57 - £135.57
£135.57

KM34 193x220x26mm SKF Lock Nut

£131.88 - £131.88
£131.88
£131.88 - £131.88
£131.88

KM34 193x220x26mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£131.88 - £131.88
£131.88
£131.88 - £131.88
£131.88

KM33 193x210x26mm SKF Lock Nut

£123.28 - £123.28
£123.28
£123.28 - £123.28
£123.28

KM33 193x210x26mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£123.28 - £123.28
£123.28
£123.28 - £123.28
£123.28

KM32 182x210x25mm SKF Lock Nut

£115.93 - £115.93
£115.93
£115.93 - £115.93
£115.93

KM32 182x210x25mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£115.93 - £115.93
£115.93
£115.93 - £115.93
£115.93

KM31 182x200x25mm SKF Lock Nut

£108.57 - £108.57
£108.57
£108.57 - £108.57
£108.57

KM31 182x200x25mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£108.57 - £108.57
£108.57
£108.57 - £108.57
£108.57

KM3 24x28x5mm SKF Lock Nut

£4.75 - £4.75
£4.75
£4.75 - £4.75
£4.75

KM3 24x28x5mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£4.75 - £4.75
£4.75
£4.75 - £4.75
£4.75

KM30 171x195x24mm SKF Lock Nut

£101.21 - £101.21
£101.21
£101.21 - £101.21
£101.21

KM30 171x195x24mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£101.21 - £101.21
£101.21
£101.21 - £101.21
£101.21

KM28 160x180x22mm SKF Lock Nut

£102.38 - £102.38
£102.38
£102.38 - £102.38
£102.38

KM28 160x180x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£102.38 - £102.38
£102.38
£102.38 - £102.38
£102.38

KM26 149x165x21mm SKF Lock Nut

£81.54 - £81.54
£81.54
£81.54 - £81.54
£81.54

KM26 149x165x21mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£81.54 - £81.54
£81.54
£81.54 - £81.54
£81.54

KM29 171x190x24mm SKF Lock Nut

£119.61 - £119.61
£119.61
£119.61 - £119.61
£119.61

KM29 171x190x24mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£119.61 - £119.61
£119.61
£119.61 - £119.61
£119.61

KM27 160x175x22mm SKF Lock Nut

£107.35 - £107.35
£107.35
£107.35 - £107.35
£107.35

KM27 160x175x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£107.35 - £107.35
£107.35
£107.35 - £107.35
£107.35

KM25 148x160x21mm SKF Lock Nut

£76.68 - £76.68
£76.68
£76.68 - £76.68
£76.68

KM25 148x160x21mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£76.68 - £76.68
£76.68
£76.68 - £76.68
£76.68

KM24 138x155x20mm SKF Lock Nut

£70.54 - £70.54
£70.54
£70.54 - £70.54
£70.54

KM24 138x155x20mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£70.54 - £70.54
£70.54
£70.54 - £70.54
£70.54

KM23 137x150x19mm SKF Lock Nut

£67.48 - £67.48
£67.48
£67.48 - £67.48
£67.48

KM23 137x150x19mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£67.48 - £67.48
£67.48
£67.48 - £67.48
£67.48

Hi. Need any help?