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
KM20 - FBJ Lock Nut Bearing - 100x130x18mm
Original price
$14.00
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Original price
$14.00
Original price
$14.00
$14.00
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$14.00
Current price
$14.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$14.00
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Original price
$14.00
Original price
$14.00
$14.00
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$14.00
Current price
$14.00
KM19 - FBJ Lock Nut Bearing - 113x125x17mm
Original price
$15.00
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Original price
$15.00
Original price
$15.00
$15.00
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$15.00
Current price
$15.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$15.00
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Original price
$15.00
Original price
$15.00
$15.00
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$15.00
Current price
$15.00
KM18 - FBJ Lock Nut Bearing - 90x120x16mm
Original price
$11.00
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Original price
$11.00
Original price
$11.00
$11.00
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$11.00
Current price
$11.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$11.00
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Original price
$11.00
Original price
$11.00
$11.00
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$11.00
Current price
$11.00
KM17 - FBJ Lock Nut Bearing - 85x110x16mm
Original price
$8.00
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Original price
$8.00
Original price
$8.00
$8.00
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$8.00
Current price
$8.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$8.00
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Original price
$8.00
Original price
$8.00
$8.00
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$8.00
Current price
$8.00
KM15 - FBJ Lock Nut Bearing - 90x98x13mm
Original price
$8.00
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Original price
$8.00
Original price
$8.00
$8.00
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$8.00
Current price
$8.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$8.00
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Original price
$8.00
Original price
$8.00
$8.00
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$8.00
Current price
$8.00
KM10 - FBJ Lock Nut -61x70x11mm
Original price
$5.00
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Original price
$5.00
Original price
$5.00
$5.00
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$5.00
Current price
$5.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$5.00
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Original price
$5.00
Original price
$5.00
$5.00
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$5.00
Current price
$5.00
KM09 - FBJ Lock Nut Bearing - 56x65x10mm
Original price
$4.00
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Original price
$4.00
Original price
$4.00
$4.00
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$4.00
Current price
$4.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$4.00
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Original price
$4.00
Original price
$4.00
$4.00
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$4.00
Current price
$4.00
KM07 - FBJ Lock Nut Bearing - 35x52x8mm
Original price
$3.00
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Original price
$3.00
Original price
$3.00
$3.00
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$3.00
Current price
$3.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$3.00
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Original price
$3.00
Original price
$3.00
$3.00
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$3.00
Current price
$3.00
KM06 - FBJ Lock Nut Bearing - 30x45x7mm
Original price
$3.00
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Original price
$3.00
Original price
$3.00
$3.00
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$3.00
Current price
$3.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$3.00
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Original price
$3.00
Original price
$3.00
$3.00
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$3.00
Current price
$3.00
KM05 - FBJ Lock Nut Bearing - 32x38x7mm
Original price
$3.00
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Original price
$3.00
Original price
$3.00
$3.00
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$3.00
Current price
$3.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$3.00
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Original price
$3.00
Original price
$3.00
$3.00
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$3.00
Current price
$3.00
KM04 - FBJ Lock Nut Bearing - 20x32x6mm
Original price
$2.00
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Original price
$2.00
Original price
$2.00
$2.00
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$2.00
Current price
$2.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$2.00
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Original price
$2.00
Original price
$2.00
$2.00
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$2.00
Current price
$2.00
KM03 - FBJ Lock Nut Bearing - 17x28x5mm
Original price
$2.00
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Original price
$2.00
Original price
$2.00
$2.00
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$2.00
Current price
$2.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
Original price
$2.00
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Original price
$2.00
Original price
$2.00
$2.00
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$2.00
Current price
$2.00
AN21 - FBJ Lock Nut Bearing - 105x140x18mm
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$0.00
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Original price
$0.00
Original price
$0.00
$0.00
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$0.00
Current price
$0.00
Thanks for looking: Should the selected brand not be available a suitable alternative will be sent.
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$0.00
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$0.00
Original price
$0.00
$0.00
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$0.00
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$0.00
TMHN7 SKF Bearing Lock Nut Spanner
Original price
$563.00
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Original price
$563.00
Original price
$563.00
$563.00
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$563.00
Current price
$563.00
This set of lock nut spanners is designed especially for mounting self-aligning bearings, as well as CARB toroidal roller bearings and small spheri...
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Original price
$563.00
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Original price
$563.00
Original price
$563.00
$563.00
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$563.00
Current price
$563.00
TMFS0 SKF Axial Lock Nut Socket
Original price
$87.00
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Original price
$87.00
Original price
$87.00
$87.00
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$87.00
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$87.00
SKF axial lock nut sockets require less space around the bearing arrangement than hook spanners, and fit nuts from the KM, KMK and KMF series
Original price
$87.00
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Original price
$87.00
Original price
$87.00
$87.00
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$87.00
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$87.00
TMFS1 SKF Axial Lock Nut Socket
Original price
$87.00
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Original price
$87.00
Original price
$87.00
$87.00
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$87.00
Current price
$87.00
SKF axial lock nut sockets require less space around the bearing arrangement than hook spanners, and fit nuts from the KM, KMK and KMF series
Original price
$87.00
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Original price
$87.00
Original price
$87.00
$87.00
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$87.00
Current price
$87.00
HN8-9 SKF Hook Type Lock Nut Spanner 58 65mm
Original price
$36.00
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Original price
$36.00
Original price
$36.00
$36.00
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$36.00
Current price
$36.00
This HN8-9 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$36.00
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Original price
$36.00
Original price
$36.00
$36.00
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$36.00
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$36.00
HN7 SKF Hook Type Lock Nut Spanner 52 55mm
Original price
$33.00
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Original price
$33.00
Original price
$33.00
$33.00
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$33.00
Current price
$33.00
This HN7- SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$33.00
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Original price
$33.00
Original price
$33.00
$33.00
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$33.00
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$33.00
HN4 SKF Hook Type Lock Nut Spanner 30 32mm
Original price
$27.00
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Original price
$27.00
Original price
$27.00
$27.00
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$27.00
Current price
$27.00
This HN4 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$27.00
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Original price
$27.00
Original price
$27.00
$27.00
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$27.00
Current price
$27.00
HN1 SKF Hook Type Lock Nut Spanner 20 22mm
Original price
$24.00
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Original price
$24.00
Original price
$24.00
$24.00
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$24.00
Current price
$24.00
This HN1 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$24.00
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Original price
$24.00
Original price
$24.00
$24.00
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$24.00
Current price
$24.00
HN2-3 SKF Hook Type Lock Nut Spanner 25 28mm
Original price
$26.00
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Original price
$26.00
Original price
$26.00
$26.00
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$26.00
Current price
$26.00
This HN2-3 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$26.00
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Original price
$26.00
Original price
$26.00
$26.00
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$26.00
Current price
$26.00
HN21-22 SKF Hook Type Lock Nut Spanner 135 145mm
Original price
$82.00
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Original price
$82.00
Original price
$82.00
$82.00
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$82.00
Current price
$82.00
This HN21-22 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$82.00
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Original price
$82.00
Original price
$82.00
$82.00
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$82.00
Current price
$82.00
HN16 SKF Hook Type Lock Nut Spanner 105mm
Original price
$51.00
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Original price
$51.00
Original price
$51.00
$51.00
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$51.00
Current price
$51.00
This HN16 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$51.00
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Original price
$51.00
Original price
$51.00
$51.00
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$51.00
Current price
$51.00
HN18-20 SKF Hook Type Lock Nut Spanner 120 130mm
Original price
$65.00
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Original price
$65.00
Original price
$65.00
$65.00
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$65.00
Current price
$65.00
This HN18-20 SKF hook spanner is designed for use with SKF KM nuts as well as any other KM nuts conforming to the DIN981 standard.
Original price
$65.00
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Original price
$65.00
Original price
$65.00
$65.00
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$65.00
Current price
$65.00