Button Head Screw

Custom Bolts Manufacturer

Button Head screw also known as Button Socket Cap Screws are high-strength fasteners with an Internal Hex or Allen drive style with a wider bearing surface head. Button Socket Screws provide a more visually aesthetic appearance and are used in mechanical applications. Socket button head cap screws are mostly used when the need for reducing the size of equipment arises. The critical characteristic feature of these screws is the wide load-bearing surface. This particular quality makes it resistant to looseness. They are mostly used in the designing of compartments in the overhead space of a house. An essential expectation from those spaces is the ability to provide more space with limited hardware. To assist in the better assembly of all the parts, these screws also come with a wide cross-section.

The Difference Between Pan Head Screws And Button Head Screws. Button head screws have chamfered sides that curve all the way down to the bottom of the screw head. They have a slightly domed top but they do not have straight sides like pan head screws.

DIN 34805-1 – 2018 Button head screws – Driving feature hexalobular socket

Thread Size (d)M3M4M5M6M8M10M12
PPitch0.50.70.811.251.51.75
bRef.18202224283236
damax3.64.75.76.89.211.213.7
dkmax5.77.69.510.51417.521
min5.47.249.1410.0713.5717.0720.48
d1Ref.3.54.95.679.911.214.2
dsmax345681012
min2.863.824.825.827.789.7811.73
dwmin4.976.668.419.2612.4815.718.85
kmax1.82.4533.34.55.56.6
min1.62.252.734.25.26.24
Rmax3.54.65.66.27.610.111.8
min2.53.44.456.28.510
r1min0.10.20.20.250.40.40.6
r2min0.30.40.450.50.70.71.1
Socket No.10202530455055
ARef.2.83.954.55.67.938.9511.35
tmax0.931.531.611.782.543.053.8
min0.81.241.321.482.152.653.35
Length of Thread b

①,r1: Below the head radius for screws with thread-free.
②,r2:Shank lower head radius for screws with thread up to the head.

DIN 34805-2 – 2018 Button Head Screws – Screws With Collar and Driving Feature Hexalobular Socket

button head screw size charts
Thread Size(d)M3M4M5M6M8M10M12
PPitch0.50.70.811.251.51.75
dcmax6.99.411.813.617.821.926
min6.328.8211.112.917.121.0625.16
dsmax345681012
min2.863.824.825.827.789.7811.73
kmax1.82.4533.34.55.56.6
min1.62.252.734.25.26.24
Socket No.10202530455055
ARef.2.83.954.55.67.938.9511.35
tmax0.931.531.611.782.543.053.8
min0.81.241.321.482.152.653.35
Length of Thread bRef.
button head screw dimensions

ISO 7380 – 2004 Hexagon Socket Button Head Screws

button head screw chart
Thread Size(d)M3M4M5M6M8M10M12M16
PPitch0.50.70.811.251.51.752
amax11.41.622.533.54
min0.50.70.811.251.51.752
dkmax5.77.69.510.51417.52128
min5.47.249.1410.0713.5717.0720.4827.48
e ①min2.3032.8733.4434.5835.7236.8639.14911.429
kmax1.652.22.753.34.45.56.68.8
min1.41.952.534.15.26.248.44
s ①Nominal Size22.53456810
max2.082.583.084.0955.146.148.17510.175
min2.022.523.024.025.026.028.02510.025
tmin1.041.31.562.082.63.124.165.2
Minimum tensile load(N) ②8.832205620908012900234003710053900100000
10.9418073001180016700305004820070200130000
12.9491085061380019600357005660082400154000
button head screw sizes

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My name is Betty Lee, I’m the business manager of Heatfastener. I have been in the fastener industry for more than 15 years. Feel free to contact us. I’m happy to provide you with the best service and products.

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