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DIN 315 · DIN 314 · ASME B18.6.9

Wing Nuts Manufacturer in India

On and off by hand, no spanner needed. We make wing nuts to DIN 315 with rounded wings, DIN 314 with edged wings and ASME Type A for inch threads, in steel, stainless, brass and cast iron. Below: the nut to scale, the dimension tables, rounded against edged, the inch series and a finder.

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  • ISO 9001:2015 certified manufacturer
  • Metric and inch
  • Stainless A2 / A4
  • EN 10204 3.1 / 3.2
Stainless steel DIN 315 wing nut with rounded wings
DIN 315 M4 – M24 ASME #3 – 3/4 in Hand tightened
Overview

DIN 315 Wing Nuts: Manufacturer & Distributor

A wing nut is the fastener you can work with bare hands. Two wings give finger and thumb a grip, so covers, clamps and fixtures can be opened and closed again and again without a tool.

Exotic Alloy manufactures and distributes wing nuts from Mumbai, India, for machine and fixture builders, food and process equipment makers, furniture and display makers, and fastener distributors. We supply across India and to Rwanda, East Africa, the Middle East and South-East Asia.

Three standards

DIN 315 has rounded wings and is the common metric wing nut, often called the German type. DIN 314 has edged, square-topped wings. Inch wing nuts are made to ASME B18.6.9, where Type A comes in light, regular and heavy series. For wing screws see butterfly screws; for spanner-tightened nuts hex nuts.

DIN 315 DIN 314 ASME Type A Stainless Brass
Wing nuts at a glance
Rounded
DIN 315, M4–M24
Edged
DIN 314, M4–M12
Inch
ASME B18.6.9 Type A, #3–3/4
M10 span
48–51 mm (DIN 315)
Tightening
By hand
Materials
Steel, A2, A4, brass, cast iron
Related
Wing screws, thumb screws, washers
DIN 315 wing nut M10 with rounded wings to scale: wing span 48 to 51 mm, height 23 to 25 mm, boss 17 to 20 mm across at the bearing face and 8 to 12 mm high DIN 315 wing nut M10, rounded wings, to scale wing span L 48–51 height k 23–25 boss m 8–12 boss dk 17–20 (bearing face) Wing outline schematic; span, height and boss to scale. Thread through the boss (dashed). EXOTIC ALLOY
A DIN 315 M10 wing nut to scale. The thread runs through the boss; the wings give the grip.
Specification

Wing Nut Specification

The range we manufacture and distribute.

StandardsDIN 315, DIN 314, ASME B18.6.9
SizesM4–M24; #3–3/4 in
ThreadMetric coarse; UNC, UNF
Product gradeC (DIN 315)
StainlessA2 (304), A4 (316)
Other materialsSteel, brass, malleable cast iron
FinishPlain, zinc plated, nickel plated brass
TighteningBy hand
CertificationEN 10204 3.1; 3.2 on request
SupplyBoxed by size, or with bolts and washers
DIN 315

DIN 315 Wing Nut Dimensions

Rounded wings, coarse thread, mm.

SizePitchWing span L
max / min		Height k
max / min		Boss ⌀ dk
max / min		Boss height m
max / min		Wing tip y
max / min
M40.720 / 1810.5 / 8.58 / 64.6 / 3.21.9 / 1.1
M50.826 / 2413 / 1111 / 86.5 / 42.3 / 1.5
M6133 / 3017 / 1513 / 108 / 52.3 / 1.5
M81.2539 / 3620 / 1816 / 1310 / 6.52.8 / 2
M101.551 / 4825 / 2320 / 1712 / 84.4 / 3.6
M121.7565 / 6233.5 / 31 *23 / 2014 / 104.9 / 4.1
M16273 / 7037.5 / 3529 / 2617 / 136.4 / 5.6
M202.590 / 8646.5 / 4435 / 3221 / 166.9 / 6.1
M243110 / 10656.5 / 53.544 / 4125 / 209.4 / 8.6

DIN 315:2016 (same values as 1983) from globalfastener, confirmed by fasten.it and by Aspen's maxima. L wing span, k overall height, dk boss diameter at the bearing face, m boss height (the threaded length), y wing thickness at the tip. * M12: fasten.it gives k max 35.5 mm; globalfastener (both editions), Aspen and Keller & Kalmbach give 33.5 mm, which we use. M14 wing nuts, listed by some suppliers, are made to order.

DIN 314

DIN 314 Wing Nuts with Edged Wings

Edged wings, mm.

SizeWing span e
max / min		Height h
max / min		Boss ⌀ D1
max / min		Boss height m
max / min		Rounded DIN 315
span / height max
M421 / 1911 / 99 / 74.6 / 3.220 / 10.5
M526.5 / 24.513 / 1112 / 96 / 426 / 13
M632 / 2916 / 1414 / 117 / 533 / 17
M838 / 3519 / 1716 / 138.5 / 6.539 / 20
M1050 / 4724 / 2221 / 1810 / 851 / 25
M1266 / 6332 / 2924 / 2113 / 1065 / 33.5

DIN 314 from fasten.it; the same span, height, boss and boss height as the head of the DIN 318 edged wing screw (globalfastener, 1999 and 2016). Compared with DIN 315 the edged nut is a little wider at M4, M5 and M12 and a little narrower at M6 to M10.

M10 wing nuts to scale: DIN 315 with rounded wings, span up to 51 mm and height up to 25 mm, and DIN 314 with edged wings, span up to 50 mm and height up to 24 mm M10 to scale: rounded wings (DIN 315) vs edged wings (DIN 314) DIN 315, rounded wings span 51, height 25 max DIN 314, edged wings span 50, height 24 max Wing outlines schematic; span, height, boss diameter and boss height to scale. EXOTIC ALLOY
Rounded or edged. Nearly the same size at M10; the choice is about grip and looks.
ASME inch

ASME B18.6.9 Type A Wing Nuts

Cold forged or cold formed solid wing nuts, inches.

SizeUNCSeriesWing spread A
max / min		Wing height B
max / min		Wing thick C
max / min		Between wings D
max / min		Boss ⌀ E
max / min		Boss height G
max / min
#348Heavy0.72 / 0.590.41 / 0.280.11 / 0.070.21 / 0.170.33 / 0.290.14 / 0.10
#440Heavy0.72 / 0.590.41 / 0.280.11 / 0.070.21 / 0.170.33 / 0.290.14 / 0.10
#540Light0.72 / 0.590.41 / 0.280.11 / 0.070.21 / 0.170.33 / 0.290.14 / 0.10
#540Heavy0.91 / 0.780.47 / 0.340.14 / 0.100.27 / 0.220.43 / 0.390.18 / 0.14
#632Light0.72 / 0.590.41 / 0.280.11 / 0.070.21 / 0.170.33 / 0.290.14 / 0.10
#632Heavy0.91 / 0.780.47 / 0.340.14 / 0.100.27 / 0.220.43 / 0.390.18 / 0.14
#832Light0.91 / 0.780.47 / 0.340.14 / 0.100.27 / 0.220.43 / 0.390.18 / 0.14
#832Heavy1.10 / 0.970.57 / 0.430.18 / 0.140.33 / 0.260.50 / 0.450.22 / 0.17
#1024Light0.91 / 0.780.47 / 0.340.14 / 0.100.27 / 0.220.43 / 0.390.18 / 0.14
#1024Heavy1.10 / 0.970.57 / 0.430.18 / 0.140.33 / 0.260.50 / 0.450.22 / 0.17
#1224Light1.10 / 0.970.57 / 0.430.18 / 0.140.33 / 0.260.50 / 0.450.22 / 0.17
#1224Heavy1.25 / 1.120.66 / 0.530.21 / 0.170.39 / 0.320.58 / 0.510.25 / 0.20
1/420Light1.10 / 0.970.57 / 0.430.18 / 0.140.33 / 0.260.50 / 0.450.22 / 0.17
1/420Regular1.25 / 1.120.66 / 0.530.21 / 0.170.39 / 0.320.58 / 0.510.25 / 0.20
1/420Heavy1.44 / 1.310.79 / 0.650.24 / 0.200.48 / 0.420.70 / 0.640.30 / 0.26
5/1618Light1.25 / 1.120.66 / 0.530.21 / 0.170.39 / 0.320.58 / 0.510.25 / 0.20
5/1618Regular1.44 / 1.310.79 / 0.650.24 / 0.200.48 / 0.420.70 / 0.640.30 / 0.26
5/1618Heavy1.94 / 1.811.00 / 0.870.33 / 0.260.65 / 0.540.93 / 0.860.39 / 0.35
3/816Light1.44 / 1.310.79 / 0.650.24 / 0.200.48 / 0.420.70 / 0.640.30 / 0.26
3/816Regular1.94 / 1.811.00 / 0.870.33 / 0.260.65 / 0.540.93 / 0.860.39 / 0.35
7/1614Light1.94 / 1.811.00 / 0.870.33 / 0.260.65 / 0.540.93 / 0.860.39 / 0.35
7/1614Heavy2.76 / 2.621.44 / 1.310.40 / 0.340.90 / 0.801.19 / 1.130.55 / 0.51
1/213Light1.94 / 1.811.00 / 0.870.33 / 0.260.65 / 0.540.93 / 0.860.39 / 0.35
1/213Heavy2.76 / 2.621.44 / 1.310.40 / 0.340.90 / 0.801.19 / 1.130.55 / 0.51
9/1612Heavy2.76 / 2.621.44 / 1.310.40 / 0.340.90 / 0.801.19 / 1.130.55 / 0.51
5/811Heavy2.76 / 2.621.44 / 1.310.40 / 0.340.90 / 0.801.19 / 1.130.55 / 0.51
3/410Heavy2.76 / 2.621.44 / 1.310.40 / 0.340.90 / 0.801.19 / 1.130.55 / 0.51

ASME B18.6.9 Type A from AmesWeb and ITA Fasteners; the same wing sizes appear on the ASME B18.17 Type A wing screws (globalfastener). ITA prints the 1/4 light D max as 0.39 in; AmesWeb and the matching wing size elsewhere give 0.33. UNF threads in the same sizes on request.

ASME B18.6.9 Type A wing nuts 1/4-20 to scale in light, regular and heavy series: wing spread up to 1.10, 1.25 and 1.44 in, height up to 0.57, 0.66 and 0.79 in 1/4-20 Type A wing nuts to scale: light, regular and heavy series Light A 1.10, B 0.57 in max Regular A 1.25, B 0.66 in max Heavy A 1.44, B 0.79 in max A wing spread, B height, E boss diameter, G boss height to scale; wing outline schematic. EXOTIC ALLOY
One thread, three wing sizes. Heavier series give more grip.
Room & use

Room to Turn and Using Wing Nuts

DIN 315 wing span and height, M4 to M24: span from 20 to 110 mm, height from 10.5 to 56.5 mm, maximum values DIN 315: room the wings need, mm (maximum values) Wing span L Height k 0 20 40 60 80 100 120 M4 span: 20 mm M4 height: 10.5 mm M4 M5 span: 26 mm M5 height: 13 mm M5 M6 span: 33 mm M6 height: 17 mm M6 M8 span: 39 mm M8 height: 20 mm M8 M10 span: 51 mm M10 height: 25 mm M10 M12 span: 65 mm M12 height: 33.5 mm M12 M16 span: 73 mm M16 height: 37.5 mm M16 M20 span: 90 mm M20 height: 46.5 mm M20 M24 span: 110 mm M24 height: 56.5 mm M24 DIN 315 (globalfastener 2016, fasten.it, Aspen). Hover a bar for the value. EXOTIC ALLOY
The wings set the space needed. Hover a bar for the value.
  • Swing room: a clear circle at least the wing span across, plus room for the fingers.
  • Bolt length: clamped thickness plus the boss height m, so the thread runs through the boss.
  • Made for hand tightening on covers, clamps and fixtures; for a set preload use a hex nut and spanner.
  • A washer under the boss protects soft or painted parts.
Finder

Wing Nut Finder: Size, Room & Bolt Length

Pick the nut and enter your space; get the dimensions, a room check, the bolt length and the order line.

Nut & space

Dimensions from the tables on this page (maximum values); inch sizes converted at 25.4 mm. Room check: the clear circle must be at least the wing span; leave extra for fingers. Shortest bolt (metric) = clamped parts + boss height m max.

Result
51
mm wing span
25
mm high
Room check:70 mm: fits, 19 mm to spare
Boss:⌀ 20, 12 mm high
Shortest bolt:22 mm (hole 11 mm, ISO 273)
Designation:1000 pcs wing nut DIN 315 – M10, stainless A2

Materials

Wing Nut Materials & Finishes

MaterialMade byFinishWhere
Stainless A2 (304)Forged or cold formedPlain, as in the photoFood plants, outdoor fittings, furniture
Stainless A4 (316)Forged or cold formedPlainMarine, coastal and chemical areas
SteelForged or cold formedZinc platedMachines, fixtures, indoor
Malleable cast ironCastZinc platedGeneral engineering, low cost
BrassForged or castPlain or nickel platedElectrical and decorative

DIN 315 lists malleable cast iron, steel (forged or cold worked), copper-zinc alloy and austenitic stainless steel, the choice of process left to the maker.

Stainless
A2 · A4

As in the photo.

304316
Steel
Zinc plated

Forged or cold formed.

1010
Brass
Plain · nickel

Electrical and decorative.

Brass
Manufacturing

How Our Wing Nuts Are Made

1

Material

Steel, stainless or brass bar; cast iron melt.

2

Form

Wings and boss forged, cold formed or cast.

3

Trim

Flash removed, edges rounded for the fingers.

4

Tap

Thread tapped through the boss.

5

Finish

Zinc or nickel plated, or passivated.

6

Inspect

Thread, span and height checked.

Applications

Where Our Wing Nuts Are Used

Machine guards

Covers opened for cleaning and service.

Food equipment

Parts taken apart for washing.

Jigs & fixtures

Quick clamping of work pieces.

Stands & displays

Music stands, exhibition stands, signs.

Electrical

Battery terminals and earth points.

Agriculture

Adjustable implements and covers.

Quality & testing

Wing Nut Inspection & Certification

CheckMethodApplied to
ThreadGO / NOT GO plug gaugesEvery lot
Span, height, bossCalipersEvery lot
Wing edgesVisual, free of flash and sharp edgesEvery lot
CastingsVisual, crack checkCast iron lots
MaterialHeat certificate, PMI on requestEvery heat
CoatingThickness gaugePlated lots

Every shipment includes

  • EN 10204 3.1 certificate
  • Lot number on every box
  • Packing list by size

On request

  • EN 10204 3.2 with third-party inspection
  • Salt spray tests on plated nuts
  • Sets with bolts and washers
FAQ

Wing Nut Questions, Answered

A nut with two wings that is turned by finger and thumb, so it can be put on and taken off quickly without a tool. The common metric type is DIN 315 with rounded wings, M4 to M24; DIN 314 has edged wings; inch wing nuts are made to ASME B18.6.9.

The wing shape. DIN 315 wings are rounded, DIN 314 wings are edged (square topped). Their spans and heights are close but not the same: at M10, DIN 315 spans up to 51 mm and stands up to 25 mm high, DIN 314 up to 50 mm and 24 mm. DIN 314 covers M4 to M12.

Wing span 48 to 51 mm, height 23 to 25 mm, boss 17 to 20 mm across at the bearing face and 8 to 12 mm high, with an M10 x 1.5 thread through the boss.

Series of ASME B18.6.9 Type A wing nuts. The same thread comes with larger wings in the heavier series: a 1/4-20 light wing nut spreads up to 1.10 in, regular 1.25 in and heavy 1.44 in.

Wing nuts are made to be tightened by hand, for covers, clamps, guards and fixtures that are opened often. Where a joint needs a set preload, use a hex nut tightened with a spanner.

DIN 315 allows malleable cast iron, steel (forged or cold formed), brass and austenitic stainless steel. Stainless A2 and A4 are the usual choice outdoors and in food plants; the nut in the photo is stainless.

At least the wing span to turn, plus room for the fingers: 51 mm span and 25 mm height for an M10 DIN 315 nut, 65 mm and 33.5 mm for M12. The finder below checks your space.

At least the clamped thickness plus the boss height m, so the thread runs through the whole boss: for M10 DIN 315, the clamped parts plus 12 mm.
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