DIN 188 Bolt for Machine Tool Slots

The German standard DIN 188 covers a bolt designed for installation in machined T-slots of machine tools. The Russian equivalent of this fastener is manufactured to GOST 13152-67. It is used for securing parts, and the T-shaped head prevents the connection from loosening spontaneously.

The product is a metal rod with thread, a T-shaped head and a square sub-head providing secure fixation.

Manufacturing and application features

Fasteners of this type have the following characteristics:

• Length of the threaded metal rod — from 25 to 200 mm.
• Nominal thread diameter — from M6 to M24.
• Height of the T-shaped head — from 4.5 to 15 mm.

T-head bolts are used in machine tool building, in the assembly of industrial equipment and instruments, as well as in mechanical engineering. Carbon steel is used for manufacturing.

Dimensions and characteristics table for DIN 188 T-head bolts, mm

P	1	1.25	1.5	1.75	2	2.5	3
k	4.5	5.5	7	8	10.5	13	15
n	6	8	10	12	16	20	24
m	16	18	21	26	30	36	43
b₁	18	22	26	30	38	46	54
b₂	-	-	-	-	44	52	60
l	d
	M6	M8	M10	M12	M16	M20	M24
25	+	+	+	+
30	+	+	+	+	+
35	+	+	+	+	+
40	+	+	+	+	+	+
45	+	+	+	+	+	+
50	+	+	+	+	+	+	+
55	+	+	+	+	+	+	+
60	+	+	+	+	+	+	+
65	+	+	+	+	+	+	+
70	+	+	+	+	+	+	+
75	+	+	+	+	+	+	+
80	+	+	+	+	+	+	+
85	+	+	+	+	+	+	+
90	+	+	+	+	+	+	+
95	+	+	+	+	+	+	+
100	+	+	+	+	+	+	+
110		+	+	+	+	+	+
120		+	+	+	+	+	+
130			+	+	+	+	+
140				+	+	+	+
150				+	+	+	+
160					+	+	+
170					+	+	+
180					+	+	+
190					+	+	+
200					+	+	+

Designations:

d - nominal thread diameter

P - thread pitch

k - head height

n - diameter of the circle inscribed in the T-shaped head of the bolt

m - head width

b₁ - thread length for l ≤ 120 mm

b₂ - thread length for 120 < l ≤ 200 mm

l - length of the T-head bolt shank