DIN 985 Hexagon Self-Locking Nut with Nylon Insert

The DIN 985 hexagon self-locking nut with nylon insert is used for reliable fastening of parts across various industries. The nylon ring provides a permanent locking effect without the use of additional elements. These nuts ensure a secure connection under vibration and high loads.

DIN 985 nut: design and operating principle

DIN 985 fasteners are fitted with a nylon locking insert located inside the threaded bore. This insert prevents self-loosening of the bolt, screw or stud due to friction between the nylon and the thread. The nylon insert compresses easily under tightening force, ensuring a tight fit against the thread and a reliable locked connection.

DIN 985 nuts are made from various materials, including carbon steel, stainless steel, brass and other alloys. Stainless steel and non-ferrous metals provide high corrosion resistance and durability, which is especially important in aggressive environments. Nuts made from carbon steel in property classes 4 to 10 receive an anti-corrosion coating (zinc, nickel, cadmium plating, etc.) for additional protection against corrosion.

Applications and advantages

DIN 985 nuts are widely used in mechanical engineering, machine tool manufacturing, instrument making, construction, automotive manufacturing and other industries. Thanks to their ability to withstand vibration loads, they are suitable for the assembly of vehicles, industrial equipment and other structures.

• Reliable fixation even under vibration loads
• Suitable for repeated use
• Resistance to external effects
• Wide operating temperature range
• Long service life

When selecting, it is important to consider the key parameters: thread size, property class and material. Various versions are available, including zinc-plated and stainless variants, allowing selection of an option suited to specific operating conditions.

The closest equivalent is manufactured to the international standard ISO 10511; there may be minor differences in dimensions. Because of this, it is recommended to consult a specialist in advance when selecting suitable equivalents.

Where to buy DIN 985 nuts?

FLOK supplies DIN 985 self-locking nuts in large and small batches with delivery across Russia.

Dimension table for DIN 985 (ISO 10511) hexagon self-locking nuts, mm

d	h	m	s
M2.5	3.6	2.3	5
M3	4	2.4	5.5
M4	5	2.9	7
M5	5	3.2	8
M6	6	4	10
M7	7.5	4.7	11
M8	8	5.5	13
M10	10	6.5	17 (16)
M12	12	8	19 (18)
M14	14	9.5	22 (21)
M16	16	10.5	24
M18	18.5	13	27
M20	20	14	30
M22	22	15	32 (34)
M24	24	15	36
M27	27	17	41
M30	30	19	46
M33	33	22	50
M36	36	25	55
M39	39	27	60
M42	42	29	65
M45	45	32	70
M48	48	36	75

Designations:

d - nominal thread diameter

h - nut height

m - height of the threaded part

s - width across flats