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

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

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KM12 73x80x11mm SKF Lock Nut

£12.21 - £12.21

£12.21

£12.21 - £12.21

£12.21

KM12 73x80x11mm SKF Lock Nut Please Note: If selected brand is not available a suitable alternative will be supplied in Timken, NSK, FAG or NKE

£12.21 - £12.21

£12.21

£12.21 - £12.21

£12.21

N05 - FBJ Lock Nut -

£0.00 - £0.00

£0.00

£0.00 - £0.00

£0.00

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£0.00 - £0.00

£0.00

£0.00 - £0.00

£0.00

KM9 - FBJ Lock Nut Bearing - 45x65x10mm

£0.00 - £0.00

£0.00

£0.00 - £0.00

£0.00

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£0.00 - £0.00

£0.00

£0.00 - £0.00

£0.00

KM40 - FBJ Lock Nut Bearing - 200x250x29mm

£61.65 - £61.65

£61.65

£61.65 - £61.65

£61.65

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£61.65 - £61.65

£61.65

£61.65 - £61.65

£61.65

KM38 - FBJ Lock Nut Bearing - 214x240x28mm

£56.36 - £56.36

£56.36

£56.36 - £56.36

£56.36

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£56.36 - £56.36

£56.36

£56.36 - £56.36

£56.36

KM36 - FBJ Lock Nut Bearing - 180x230x27mm

£49.31 - £49.31

£49.31

£49.31 - £49.31

£49.31

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£49.31 - £49.31

£49.31

£49.31 - £49.31

£49.31

KM34 - FBJ Lock Nut Bearing - 193x220x26mm

£44.04 - £44.04

£44.04

£44.04 - £44.04

£44.04

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£44.04 - £44.04

£44.04

£44.04 - £44.04

£44.04

KM32 - FBJ Lock Nut Bearing - 160x210x25mm

£35.23 - £35.23

£35.23

£35.23 - £35.23

£35.23

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£35.23 - £35.23

£35.23

£35.23 - £35.23

£35.23

KM31 - FBJ Lock Nut Bearing - 182x200x25mm

£44.04 - £44.04

£44.04

£44.04 - £44.04

£44.04

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£44.04 - £44.04

£44.04

£44.04 - £44.04

£44.04

KM30 - FBJ Lock Nut Bearing - 150x195x24mm

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

KM29 - FBJ Lock Nut Bearing - 171x190x24mm

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

KM28 - FBJ Lock Nut Bearing - 160x180x22mm

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

KM27 - FBJ Lock Nut Bearing - 135x175x22mm

£42.23 - £42.23

£42.23

£42.23 - £42.23

£42.23

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£42.23 - £42.23

£42.23

£42.23 - £42.23

£42.23

KM26 - FBJ Lock Nut Bearing - 130x165x21mm

£26.62 - £26.62

£26.62

£26.62 - £26.62

£26.62

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£26.62 - £26.62

£26.62

£26.62 - £26.62

£26.62

KM25 - FBJ Lock Nut Bearing - 125x160x21mm

£22.02 - £22.02

£22.02

£22.02 - £22.02

£22.02

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£22.02 - £22.02

£22.02

£22.02 - £22.02

£22.02

KM24 - FBJ Lock Nut Bearing - 138x155x20mm

£17.62 - £17.62

£17.62

£17.62 - £17.62

£17.62

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£17.62 - £17.62

£17.62

£17.62 - £17.62

£17.62

KM23 - FBJ Lock Nut Bearing - 115x150x19mm

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£26.42 - £26.42

£26.42

£26.42 - £26.42

£26.42

KM22 - FBJ Lock Nut Bearing - 110x145x19mm

£14.09 - £14.09

£14.09

£14.09 - £14.09

£14.09

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£14.09 - £14.09

£14.09

£14.09 - £14.09

£14.09

KM21 - FBJ Lock Nut Bearing - 126x140x18mm

£14.09 - £14.09

£14.09

£14.09 - £14.09

£14.09

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£14.09 - £14.09

£14.09

£14.09 - £14.09

£14.09

KM20 - FBJ Lock Nut Bearing - 100x130x18mm

£10.57 - £10.57

£10.57

£10.57 - £10.57

£10.57

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£10.57 - £10.57

£10.57

£10.57 - £10.57

£10.57

KM19 - FBJ Lock Nut Bearing - 113x125x17mm

£11.45 - £11.45

£11.45

£11.45 - £11.45

£11.45

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£11.45 - £11.45

£11.45

£11.45 - £11.45

£11.45

KM18 - FBJ Lock Nut Bearing - 90x120x16mm

£7.93 - £7.93

£7.93

£7.93 - £7.93

£7.93

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£7.93 - £7.93

£7.93

£7.93 - £7.93

£7.93

KM17 - FBJ Lock Nut Bearing - 85x110x16mm

£6.16 - £6.16

£6.16

£6.16 - £6.16

£6.16

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£6.16 - £6.16

£6.16

£6.16 - £6.16

£6.16

KM15 - FBJ Lock Nut Bearing - 90x98x13mm

£6.16 - £6.16

£6.16

£6.16 - £6.16

£6.16

Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.

£6.16 - £6.16

£6.16

£6.16 - £6.16

£6.16

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Lock Nuts – Secure Fastening Solutions Built to Last

What Makes Lock Nuts Different?

Lock Nut Types & Use Cases

Why Choose BEP’s Lock Nut Range?

Frequently Asked Questions (FAQs)

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

Q2. When should I choose a Nyloc nut?

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

Q4. Can security locknuts be reused?

Lock Nuts

Lock Nuts – Secure Fastening Solutions Built to Last

What Makes Lock Nuts Different?

Lock Nut Types & Use Cases

Why Choose BEP’s Lock Nut Range?

Frequently Asked Questions (FAQs)

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

Q2. When should I choose a Nyloc nut?

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

Q4. Can security locknuts be reused?