DIN 564 Lock Bolt

DIN 564 lock bolts are fasteners with a reduced-size hexagon head and a conical tip. The metric thread runs along the entire length of the shank. The thread diameter ranges from M6 to M24 for form A, while for form B the thread range extends to M30. The bolt can be used together with washers and nuts of matching size. The product length ranges from 12 to 80 mm.

Manufacturing features

The bolt head has a reduced width and increased height, which allows it to be fitted into holes. The hexagon head shape allows the part to be driven and removed with a wrench. Materials:

• Steel grades 14H, 22H with no additional protective coating, property class 8.8, designed for high loads.
• Steel with additional electrogalvanized plating for increased corrosion resistance.
• A2 and A4 stainless steel with increased resistance to corrosion, acids and other aggressive media.

Material selection depends on the application conditions. With the right choice, the fastener will last for decades.

Application options

The lock bolt is designed for threaded connections of metal parts. It is screwed into a prepared threaded hole or secured with nuts and washers. Such fasteners are widely used in mechanical engineering, the automotive industry, instrument making and other industrial sectors, as well as in construction and furniture manufacturing.

DIN 564 bolt dimensions: diameter M6, M8, M10, M12, M16, M20, M24, M30, length from 12 to 80 mm.

d		M6	M8	M10	M12	M16	M20	M24	M30	M36
P	coarse	1	1.25	1.5	1.75	2	2.5	3	3.5	4
	fine	-	-	-	-	-	2	2	2	3
k		5	6	7	9	11	14	17	21	25
a₁		3	3.75	4.5	5.25	6	7.5	9	10.5	12
r		0.25	0.4	0.4	0.6	0.6	0.8	0.8	1	1
z₂		3	4	5	6	8	10	12	15	18
z₅		1.75	2.5	3	3.5	4.5	5	6	8	10
dp		4	5.5	7	8.5	12	15	18	23	28
e		8.79	11.05	14.38	17.77	19.92	26.75	33.53	39.98	51.28
s		8	10	13	16	18	24	30	36	46
l form A	min.	12	16	20	25	30	40	45	60	80
	max.	60	60	60	120	120	120	120	120	200
l form B	min.	12	16	20	25	30	40	45	60	80
	max.	40	60	60	100	120	120	120	120	200

Designations:

d - nominal thread diameter

P - thread pitch

k - hexagon head height

a₁ - thread runout, max

r - radius, min

z₂ - pin length, min

z₅ - cone height

dp - pin diameter, max

e - diameter across corners, min

s - width across flats

l - bolt length