DIN 916 Set Screw

DIN 916 governs the manufacture of set screws designed for secure fixation of parts relative to each other and protection against lateral displacement. It is a metal rod with metric thread along its full length, without a head.

A distinctive feature of the screw is the hex socket recess at the end face: the fastener is installed into a threaded hole and tightened with a wrench using significant force, which ensures a strong and reliable fixation.

Manufacturing and application features

A set screw to DIN 916 can have a diameter from M1.4 to M24 mm. The rod length ranges from 2.5 to 10 mm. The other end of the rod has a flat shape. The product is made without a protruding head: this allows it to be fully concealed in the hole and ensures inconspicuous fixation of structural elements relative to each other. This type of fastener is designed for significant mechanical loads and is used in a wide variety of assemblies and mechanisms.

Set screws are used in mechanical engineering, instrument making, machine tool building and other industrial sectors. They are also in demand for furniture manufacturing: the products are fully concealed within the material and do not detract from the decorative qualities of the finished product. Set screws are used in construction and the assembly of metal frameworks, helping to create high-strength, durable connections.

45H steel may be used for manufacturing, with additional zinc or nickel plating for corrosion protection; the metal layer is applied by electroplating. Zinc or nickel plating is needed if the fastener is used in conditions of high humidity, sharp temperature fluctuations, or other adverse environmental effects.

Stainless steel grades A1, A2 and A4 may also be used for manufacturing the screws — these materials are not subject to corrosion and withstand aggressive chemical environments. Fasteners can also be made of brass or plastic. The choice depends on operating conditions and corrosion resistance requirements.

Terms for purchasing set screws

FLOK supplies set screws on both wholesale and retail terms. FLOK is a permanent partner of major Russian and foreign manufacturers and supplies wholesale and retail lots of fastener products. Strict compliance with standards is guaranteed, and if necessary, equivalents can be selected with exact or minor deviations.

FLOK works with organizations, entrepreneurs and private individuals. Purchased goods are delivered anywhere in Russia. If needed, FLOK specialists will provide advice on selecting the right fasteners.

Dimensions of DIN 916 set screws (stainless steel A4) in mm:

dv	1.15	1.75	2.25	2.75	4.7	5.7	7.64
t	1.2/2	1.5/2.5	2/3	2/3.5	3/5	4/6	4.8/8
s	1.5	2	2.5	3	4	5	6
l	d
	M3	M4	M5	M6	M8	M10	M12
3
4
5
6
8
10
12
16
20
25
30
35
40
45
50
60

d		M1.4	M1.6	M1.8	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	M14	M16	M20	M24
P		0.3	0.35	0.35	0.4	0.45	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	3
dv		0.7	0.8	0.9	1	1.2	1.4	2	2.5	3	5	6	8	9	10	14	16
s		0.7	0.7	0.7	0.9	1.3	1.5	2	2.5	3	4	5	6	6	8	10	12
t	short	0.6	0.7	0.8	0.8	1.2	1.2	1.5	2	2	3	4	4.8	5.6	6.4	8	10
	long	1.4	1.5	1.6	1.7	2	2	2.5	3	3.5	5	6	8	9	10	12	15
l
2		#	#	#	#
2.5		+	+	+	#	#
3		+	+	+	+	#	#
4		+	+	+	+	+	#	#
5		+	+	+	+	+	+	#	#
6		+	+	+	+	+	+	+	+	#
8			+	+	+	+	+	+	+	+	#
10					+	+	+	+	+	+	+	#
12						+	+	+	+	+	+	+	#
16							+	+	+	+	+	+	+	#
20								+	+	+	+	+	+	+	#
25									+	+	+	+	+	+	+	#
30										+	+	+	+	+	+	+	#
35											+	+	+	+	+	+	+
40											+	+	+	+	+	+	+
45												+	+	+	+	+	+
50												+	+	+	+	+	+
55													+	+	+	+	+
60													+	+	+	+	+

Designations:

d - nominal thread diameter

P - thread pitch

dv - internal cone diameter, max

s - width across flats

t - screw socket depth, min

l - screw length

# - short screws with mandatory 120° chamfer angle

+ - long screws with 90° chamfer angle