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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 

HN17 SKF Hook Type Lock Nut Spanner 110 115mm

£43.69 - £43.69
£43.69
£43.69 - £43.69
£43.69

This HN17 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.

£43.69 - £43.69
£43.69
£43.69 - £43.69
£43.69

HN14 SKF Hook Type Lock Nut spanner 92mm

£31.78 - £31.78
£31.78
£31.78 - £31.78
£31.78

This HN14 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.

£31.78 - £31.78
£31.78
£31.78 - £31.78
£31.78

HN15 SKF Hook Type Lock Nut Spanner 95 100mm

£34.16 - £34.16
£34.16
£34.16 - £34.16
£34.16

This HN15 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.

£34.16 - £34.16
£34.16
£34.16 - £34.16
£34.16

KMTA9 58x68x22mm SKF Lock Nut

£62.96 - £62.96
£62.96
£62.96 - £62.96
£62.96

KMTA9 58x68x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£62.96 - £62.96
£62.96
£62.96 - £62.96
£62.96

KMTA8 52x58x22mm SKF Lock Nut

£60.50 - £60.50
£60.50
£60.50 - £60.50
£60.50

KMTA8 52x58x22mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£60.50 - £60.50
£60.50
£60.50 - £60.50
£60.50

KMTA7 47x53x20mm SKF Lock Nut

£56.95 - £56.95
£56.95
£56.95 - £56.95
£56.95

KMTA7 47x53x20mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£56.95 - £56.95
£56.95
£56.95 - £56.95
£56.95

KMTA6 40x48x20mm SKF Lock Nut

£52.59 - £52.59
£52.59
£52.59 - £52.59
£52.59

KMTA6 40x48x20mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£52.59 - £52.59
£52.59
£52.59 - £52.59
£52.59

KMTA5 35x42x20mm SKF Lock Nut

£49.43 - £49.43
£49.43
£49.43 - £49.43
£49.43

KMTA5 35x42x20mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£49.43 - £49.43
£49.43
£49.43 - £49.43
£49.43

KMTA40 237x245x32mm SKF Lock Nut

£464.39 - £464.39
£464.39
£464.39 - £464.39
£464.39

KMTA40 237x245x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£464.39 - £464.39
£464.39
£464.39 - £464.39
£464.39

KMTA38 225x240x32mm SKF Lock Nut

£434.79 - £434.79
£434.79
£434.79 - £434.79
£434.79

KMTA38 225x240x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£434.79 - £434.79
£434.79
£434.79 - £434.79
£434.79

KMTA36 215x230x32mm SKF Lock Nut

£390.37 - £390.37
£390.37
£390.37 - £390.37
£390.37

KMTA36 215x230x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£390.37 - £390.37
£390.37
£390.37 - £390.37
£390.37

KMTA34 205x215x32mm SKF Lock Nut

£367.25 - £367.25
£367.25
£367.25 - £367.25
£367.25

KMTA34 205x215x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£367.25 - £367.25
£367.25
£367.25 - £367.25
£367.25

KMTA32 190x205x32mm SKF Lock Nut

£350.60 - £350.60
£350.60
£350.60 - £350.60
£350.60

KMTA32 190x205x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£350.60 - £350.60
£350.60
£350.60 - £350.60
£350.60

KMTA30 180x190x32mm SKF Lock Nut

£300.64 - £300.64
£300.64
£300.64 - £300.64
£300.64

KMTA30 180x190x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£300.64 - £300.64
£300.64
£300.64 - £300.64
£300.64

KMTA28 166x180x32mm SKF Lock Nut

£256.00 - £256.00
£256.00
£256.00 - £256.00
£256.00

KMTA28 166x180x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£256.00 - £256.00
£256.00
£256.00 - £256.00
£256.00

KMTA26 156x165x32mm SKF Lock Nut

£223.53 - £223.53
£223.53
£223.53 - £223.53
£223.53

KMTA26 156x165x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£223.53 - £223.53
£223.53
£223.53 - £223.53
£223.53

KMTA20 120x130x32mm SKF Lock Nut

£168.08 - £168.08
£168.08
£168.08 - £168.08
£168.08

KMTA20 120x130x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£168.08 - £168.08
£168.08
£168.08 - £168.08
£168.08

KMTA24 142x155x32mm SKF Lock Nut

£176.46 - £176.46
£176.46
£176.46 - £176.46
£176.46

KMTA24 142x155x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£176.46 - £176.46
£176.46
£176.46 - £176.46
£176.46

KMTA22 132x140x32mm SKF Lock Nut

£188.26 - £188.26
£188.26
£188.26 - £188.26
£188.26

KMTA22 132x140x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£188.26 - £188.26
£188.26
£188.26 - £188.26
£188.26

KMTA19 114x125x32mm SKF Lock Nut

£146.64 - £146.64
£146.64
£146.64 - £146.64
£146.64

KMTA19 114x125x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£146.64 - £146.64
£146.64
£146.64 - £146.64
£146.64

KMTA18 110x120x32mm SKF Lock Nut

£148.40 - £148.40
£148.40
£148.40 - £148.40
£148.40

KMTA18 110x120x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£148.40 - £148.40
£148.40
£148.40 - £148.40
£148.40

KMTA17 102x115x32mm SKF Lock Nut

£118.50 - £118.50
£118.50
£118.50 - £118.50
£118.50

KMTA17 102x115x32mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£118.50 - £118.50
£118.50
£118.50 - £118.50
£118.50

KMTA16 97x110x30mm SKF Lock Nut

£125.19 - £125.19
£125.19
£125.19 - £125.19
£125.19

KMTA16 97x110x30mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£125.19 - £125.19
£125.19
£125.19 - £125.19
£125.19

KMTA15 91x100x26mm SKF Lock Nut

£118.16 - £118.16
£118.16
£118.16 - £118.16
£118.16

KMTA15 91x100x26mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£118.16 - £118.16
£118.16
£118.16 - £118.16
£118.16

Hi. Need any help?