DIN 935 Hexagon Castle Nut

DIN 935 hexagon castle nuts are fasteners used in machine building, mechanical engineering, instrument making and construction. The products are manufactured from carbon steel of property classes 5, 6, 8 and 10, high-alloy stainless steels A2 and A4, as well as non-ferrous metal alloys (brass). Stainless steel and brass alloys withstand prolonged contact with aggressive environments, while plain steel products with anti-corrosion coatings are also corrosion-resistant and suitable for operation in demanding conditions.

DIN 935 castle nuts have a distinctive design: the upper part is fitted with prongs with slots for a cotter pin, which prevents the threaded connection from loosening spontaneously under vibration or dynamic loads. This is important where quick assembly and disassembly of connections is required. Castle nuts provide a high level of connection security.

Advantages of DIN 935 castle nuts

The main purpose of DIN 935 hexagon nuts is reliable securing of bolted connections and prevention of their accidental loosening. These fasteners are used in a wide variety of assemblies and units thanks to their versatility and ability to function in different mechanisms.

• Reliable locking: the “crown” design provides reliable securing of the bolted connection, preventing spontaneous unscrewing.
• Vibration resistance: vibration often causes ordinary nuts to loosen, but the castle design with a cotter pin minimizes this risk, ensuring fastener stability under dynamic loads.
• Versatility: castle nuts are used in vehicles, engines, construction machinery, industrial equipment and other mechanisms.
• Durability: made of steel or stainless steel, castle nuts are distinguished by high strength and durability, which extends the service life of the structures they secure.

Where to buy DIN 935 nuts?

FLOK supplies DIN 935 castle nuts in sizes from M4 to M80. All products are certified and designed for long-term operation. Orders are available in small and large wholesale quantities with delivery across Russia and CIS countries. Company consultants will help select the right fastener option for specific tasks.

Dimension table of DIN 935-1 castle nuts, mm

d	de	m	n	s ISO/DIN	w	sp
M4	-	5	1.2	7	3.2	1×10
M5	-	6	1.4	8	4	1.2×12
M6	-	7.5	2	10	5	1.6×14
M8	-	9.5	2.5	13	6.5	2×16
M10	-	12	2.8	16/17	8	2.5×20
M12	16	15	3.5	18/19	10	3.2×22
M14	18	16	3.5	21/22	11	3.2×25
M16	22	19	4.5	24	13	4×28
M18	25	21	4.5	27	15	4×32
M20	28	22	4.5	30	16	4×36
M22	32	26	5.5	34/32	18	5×36
M24	34	27	5.5	36	19	5×40
M27	38	30	5.5	41	22	5×45
M30	42	33	7	46	24	6.3×50
M33	46	35	7	50	26	6.3×56
M36	50	38	7	55	29	6.3×63
M39	55	40	7	60	31	6.3×71
M42	58	46	9	65	34	8×71
M45	62	48	9	70	36	8×80
M48	65	50	9	75	38	8×80
M52	70	54	9	80	42	8×90
M56	75	57	9	85	45	8×100
M60	80	63	11	90	48	10×100
M64	85	66	11	95	51	10×100
M68	90	69	11	100	54	10×112
M72	95	73	11	105	58	10×112
M76	100	76	11	110	61	10×125
M80	105	79	11	115	64	10×140

Designations:

d - nominal thread diameter

de - crown diameter, max

m - nut height

n - slot width, min

s - width across flats

w - distance from bearing surface to slot base, max

sp - cotter pin size