DIN 315 Wing Nut

DIN 315 is the standard that governs the manufacture of wing nuts — a special type of fastener used to create quick-release connections. Its distinctive feature is special lugs for unscrewing the fastener by hand, without additional tools.

Wing nuts are widely used across many industries thanks to their special shape. They are fitted with rounded wings that make the fastener easy to hold when unscrewing and tightening.

Materials

This type of nut is used in various environments, and the material is selected accordingly. Wing nuts can be made from the following materials:

• Carbon steel with an electroplated zinc coating. The coating extends the fastener’s service life by resisting corrosion.
• Stainless steel grades A2 and A4. These alloys are corrosion-resistant, ensuring long, reliable service.
• Brass and other non-ferrous alloys. Used where maximum corrosion protection is important. Brass products do not rust over time and are not damaged by moisture or other environmental factors.

Fasteners can also be made from plastic. Polymer materials are not affected by aggressive chemical exposure and can be used in various environments.

Technical parameters

This type of fastener is manufactured according to the following set of technical specifications:

• Nominal thread diameter – from M3 to M24.
• Nut thread pitch – from 0.5 to 3 mm.
• Product diameter – from 6 to 37 mm.
• Overall size including the lugs – from 19 to 110 mm.
• Height of the nut with wings – from 9.5 to 56 mm.

An equivalent fastener is manufactured in accordance with the Russian standard GOST 3032-76. There is also an American-style equivalent, produced to the DIN 315 standard but with a different wing configuration for manual grip. In other respects, the equivalents have no significant differences.

Applications

Wing nuts are used across various industries: the automotive industry, production of special equipment, assembly of various devices, and more. Their main difference from other types of fasteners is that these nuts are not designed to be tightened with a wrench or power tool. They are used where a quick-release connection is needed, designed for repeated tightening and loosening.

Since this type of nut is designed to be tightened by hand, it does not provide high clamping force and does not form a particularly strong connection. For this reason, they are not used in critical joints designed for heavy loads.

Order terms

FLOK supplies DIN 315 wing nuts in wholesale lots with delivery to any region. Equivalent fasteners can be selected on request.

DIN 315 wing nut dimensions in mm

d		e min	h min	m min
DIN 315, Wing Nut	M4	18	8.5	3.2
DIN 315, Wing Nut	M5	24	11	4
DIN 315, Wing Nut	M6	30	15	5
DIN 315, Wing Nut	M8	36	18	6.5
DIN 315, Wing Nut	M10	48	23	8
DIN 315, Wing Nut	M12	62	31	10
DIN 315, Wing Nut	M16	70	35	13
DIN 315, Wing Nut	M20	86	44	16

d	D	e	h	m
M3	7.8	18.5	8.8	3
M4	7.8	18.5	8.8	3
M5	9.5	22	10.5	4
M6	11.9	26.8	12.9	4.9
M8	13.5	30.3	14.8	5.4
M10	15.3	35.3	17.3	6.3
M12	20.5	47.5	22.5	7.9

Designations:

d - nominal thread diameter

D - lower diameter of the wing nut, mm

e - width of the wing nut with wings, mm

h - height of the nut with wings, mm

m - height of the threaded part of the nut, mm

d P d₂ d₃ e h m
M3	0.5	7	6	19	9.5	3.9
M4	0.7	8	7	20	10.5	4.6
M5	0.8	11	9	26	13	6.5
M6	1	13	11	33	17	8
M8	1.25	16	12.5	39	20	10
M10	1.5	20	16.5	51	25	12
M12	1.75	23	19.5	65	33.5	14
M14	2	21.5	-	63.5	32.3	12
M16	2	29	23	73	37.5	17
M20	2.5	35	29	90	46.5	21
M24	3	44	37.5	110	56.5	25

Designations:

d - nominal thread diameter

P - thread pitch, mm

d₂ - lower diameter of the wing nut, max, mm

d₃ - upper diameter of the nut, max, mm

e - width of the wing nut with wings, max, mm

h - height of the nut with wings, max, mm

m - height of the threaded part of the nut, max, mm