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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 

KM21 126x140x18mm SKF Lock Nut

£42.10 - £42.10
£42.10
£42.10 - £42.10
£42.10

KM21 126x140x18mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£42.10 - £42.10
£42.10
£42.10 - £42.10
£42.10

KM22 133x145x19mm SKF Lock Nut

£48.82 - £48.82
£48.82
£48.82 - £48.82
£48.82

KM22 133x145x19mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£48.82 - £48.82
£48.82
£48.82 - £48.82
£48.82

KM20 120x130x18mm SKF Lock Nut

£37.27 - £37.27
£37.27
£37.27 - £37.27
£37.27

KM20 120x130x18mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£37.27 - £37.27
£37.27
£37.27 - £37.27
£37.27

KM19 113x125x17mm SKF Lock Nut

£38.18 - £38.18
£38.18
£38.18 - £38.18
£38.18

KM19 113x125x17mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£38.18 - £38.18
£38.18
£38.18 - £38.18
£38.18

KM18 108x120x16mm SKF Lock Nut

£35.10 - £35.10
£35.10
£35.10 - £35.10
£35.10

KM18 108x120x16mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£35.10 - £35.10
£35.10
£35.10 - £35.10
£35.10

KM17 102x110x16mm SKF Lock Nut

£25.07 - £25.07
£25.07
£25.07 - £25.07
£25.07

KM17 102x110x16mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£25.07 - £25.07
£25.07
£25.07 - £25.07
£25.07

KM15 90x98x13mm SKF Lock Nut

£17.75 - £17.75
£17.75
£17.75 - £17.75
£17.75

KM15 90x98x13mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£17.75 - £17.75
£17.75
£17.75 - £17.75
£17.75

KM14 85x92x12mm SKF Lock Nut

£17.06 - £17.06
£17.06
£17.06 - £17.06
£17.06

KM14 85x92x12mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£17.06 - £17.06
£17.06
£17.06 - £17.06
£17.06

KM16 95x105x15mm SKF Lock Nut

£24.05 - £24.05
£24.05
£24.05 - £24.05
£24.05

KM16 95x105x15mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£24.05 - £24.05
£24.05
£24.05 - £24.05
£24.05

KM13 79x85x12mm SKF Lock Nut

£14.75 - £14.75
£14.75
£14.75 - £14.75
£14.75

KM13 79x85x12mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£14.75 - £14.75
£14.75
£14.75 - £14.75
£14.75

KM11 67x75x11mm SKF Lock Nut

£11.30 - £11.30
£11.30
£11.30 - £11.30
£11.30

KM11 67x75x11mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£11.30 - £11.30
£11.30
£11.30 - £11.30
£11.30

KM10 61x70x11mm SKF Lock Nut

£10.47 - £10.47
£10.47
£10.47 - £10.47
£10.47

KM10 61x70x11mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£10.47 - £10.47
£10.47
£10.47 - £10.47
£10.47

KM1 17x22x4mm SKF Lock Nut

£3.43 - £3.43
£3.43
£3.43 - £3.43
£3.43

KM1 17x22x4mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£3.43 - £3.43
£3.43
£3.43 - £3.43
£3.43

KM0 13.5x18x4mm SKF Lock Nut

£3.43 - £3.43
£3.43
£3.43 - £3.43
£3.43

KM0 13.5x18x4mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£3.43 - £3.43
£3.43
£3.43 - £3.43
£3.43

HM56T 320x350x38mm SKF Lock Nut

£625.35 - £625.35
£625.35
£625.35 - £625.35
£625.35

HM56T 320x350x38mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£625.35 - £625.35
£625.35
£625.35 - £625.35
£625.35

HM52T 300x330x36mm SKF Lock Nut

£506.31 - £506.31
£506.31
£506.31 - £506.31
£506.31

HM52T 300x330x36mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£506.31 - £506.31
£506.31
£506.31 - £506.31
£506.31

HM50T 290x320x36mm SKF Lock Nut

£524.40 - £524.40
£524.40
£524.40 - £524.40
£524.40

HM50T 290x320x36mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£524.40 - £524.40
£524.40
£524.40 - £524.40
£524.40

HM48T 270x300x34mm SKF Lock Nut

£383.28 - £383.28
£383.28
£383.28 - £383.28
£383.28

HM48T 270x300x34mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£383.28 - £383.28
£383.28
£383.28 - £383.28
£383.28

HM46T 260x290x34mm SKF Lock Nut

£373.67 - £373.67
£373.67
£373.67 - £373.67
£373.67

HM46T 260x290x34mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£373.67 - £373.67
£373.67
£373.67 - £373.67
£373.67

HM44T 250x280x32mm SKF Lock Nut

£325.38 - £325.38
£325.38
£325.38 - £325.38
£325.38

HM44T 250x280x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£325.38 - £325.38
£325.38
£325.38 - £325.38
£325.38

HM42T 238x270x30mm SKF Lock Nut

£304.92 - £304.92
£304.92
£304.92 - £304.92
£304.92

HM42T 238x270x30mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£304.92 - £304.92
£304.92
£304.92 - £304.92
£304.92

HM3184 490x540x70mm SKF Lock Nut

£3,145.51 - £3,145.51
£3,145.51
£3,145.51 - £3,145.51
£3,145.51

HM3184 490x540x70mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£3,145.51 - £3,145.51
£3,145.51
£3,145.51 - £3,145.51
£3,145.51

HM3180 460x520x62mm SKF Lock Nut

£3,534.32 - £3,534.32
£3,534.32
£3,534.32 - £3,534.32
£3,534.32

HM3180 460x520x62mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£3,534.32 - £3,534.32
£3,534.32
£3,534.32 - £3,534.32
£3,534.32

HM3172 420x460x58mm SKF Lock Nut

£2,041.46 - £2,041.46
£2,041.46
£2,041.46 - £2,041.46
£2,041.46

HM3172 420x460x58mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£2,041.46 - £2,041.46
£2,041.46
£2,041.46 - £2,041.46
£2,041.46

Hi. Need any help?