New arrivals: Heavy-duty anchors now in stock
Trusted Industrial Fasteners Partner Since 2004

NUTS
5 variantsMFB Full Steel Lock Nuts provide exceptional resistance against vibration and loosening, ensuring secure fastening in heavy-duty industrial and structural applications.
Thread Type
METRIC THREAD
Grade
GR-8 & 304, 316
5 variant options available with multiple material choices.
CATEGORY
NUTS
PRODUCT
FULL STEEL LOCKNUT
THREAD TYPE
METRIC THREAD
GRADE
GR-8 & 304, 316
Thread, grade, size, and material combinations available for this product.
Threading
STANDARD
Size
ALL SIZE AVAILABLE
Available Materials
Threading
STANDARD
Size
ALL SIZE AVAILABLE
Available Materials
Threading
STANDARD
Size
ALL SIZE AVAILABLE
Available Materials
Threading
STANDARD
Size
ALL SIZE AVAILABLE
Available Materials
Threading
STANDARD
Size
ALL SIZE AVAILABLE
Available Materials
MFB Full Steel Lock Nuts are engineered to deliver superior locking performance in environments where vibration, shock, and dynamic loads can cause conventional fasteners to loosen. Manufactured entirely from metal without nylon inserts, these lock nuts maintain their locking capability even under high temperatures and demanding operating conditions. Designed according to DIN 980 standards, Full Steel Lock Nuts utilize a prevailing torque locking mechanism that creates continuous resistance against thread movement. This ensures reliable fastening integrity, enhanced safety, and long-term performance in critical assemblies. Their robust all-metal construction makes them ideal for applications where temperature resistance, durability, and repeated assembly are essential. Widely used across industrial, construction, transportation, marine, and heavy engineering sectors, MFB Full Steel Lock Nuts provide dependable fastening solutions for the most demanding environments.