DIN 607 Round Head Bolt with Nib

The DIN 607 round head bolt with nib corresponds to the Russian GOST 7801-81 and applies to round head bolts of increased size with a nib. It is a furniture fastener, but its application is not limited to that: the DIN 607 bolt is used in construction, in the assembly of machinery and instrument-making products, in household applications and other fields.

Technical features of round head bolts with nib

The raw material for manufacturing these fasteners is carbon steel alloys with property class 3.6 or 4.6, stainless chromium-nickel steel A2 and A4 (with molybdenum added), as well as brass. Structurally, the product consists of:

• a shank with partial metric thread M8–M16, length ranging from 30–160 mm;
• a hemispherical-shaped head with a sufficient bearing surface area;
• a special projection on the underside of the head, called a nib.

The bolt head has no slots or recesses, so these fasteners are purchased together with DIN 934 nuts to create a reliable fastening assembly.

Marking is carried out in accordance with the requirements of GOST 7801-81. The designation “Bolt M12×60.36.016” encodes: thread diameter 12 mm, coarse thread pitch with tolerance value 8, length 60 mm, property class 3.6. The product is made of carbon steel with electroplated zinc coating as anti-corrosion protection.

Operating principle of the DIN 607 bolt

The main feature of this fastener is the presence of a nib. This simple element serves as a stop that prevents the bolt from turning while the fastener is being tightened. The nib also prevents the fastening assembly from loosening during use, which is important for wooden furniture items subject to constant use — sofas, chairs, armchairs and other movable pieces.

The increased-diameter bolt head protects the joined surface from indentation and damage. The spherical head with a smooth surface is used for decorating furniture, giving the item a distinctive appearance. Thus, the bolt serves both a practical and an aesthetic purpose.

Where to buy round head bolts with nib

FLOK supplies the DIN 607 round head bolt with nib in various sizes and quantities to legal entities and individuals, sole proprietors, on a one-time or long-term basis. Pre-order is available.

d	M8	M10	M12	M16
p	1.25	1.5	1.75	2
b	22 - 28	26 - 32	30 - 36	38 - 57
dk	16.55	19.65	24.65	30.65
ds	8	10	12	16
k	6.38	7.45	9.65	11.75
i	2.3	2.7	3.2	3.5
g	3	3.2	3.6	4.2
r₁	8.9	10.5	13.3	15.8
	Weight of 1000 pcs. of bolts, kg
l	M8	M10	M12	M16
30	15.3
35	17.1	27.3
40	19	30.2	49
45	20.8	33.2	53.3	98
50	22.7	36.1	57.5	105
55	24.6	38.9	61.7	113
60	26.5	41.8	65.9	122
65	28.4	44.7	70.1	129
70	30.3	47.6	74.3	136
80	34	53.4	82.7	151
90		59.3	91	165
100		65.1	99	180
110			107	195
120			115	210
130				226
140				241
150				257
160				273