Small Screw Sizes

Custom screw Manufacturer

What is small screw used for?

For screw feeding systems, I would define “small” screws as screw sizes smaller than #4 for American National Standard or ANSI screws. For metric screws, sizes smaller than 3mm would also be considered “small” screws. Miniature Screw Threads are small screws that are used in timepieces, like electronics screws(tiny screws for electronics), optical instruments, electrical meters, measuring instruments, etc. They are used to fasten very small parts into delicate assemblies, and therefore are delicate themselves. Small screw sizes chart depending on the screw head type, groove type, thread type, etc., to be different in size. For example, truss head, round head, flat head, pan head, oval head, raised countersunk head, cheese head, raised cheese head, etc have different sizes.

Knurled small head screw sizes

small screw sizes
Screw Thread(d) Screw Thread(d) M1.6M2M2.5M3
PP0.360.40.450.5
dkmax(before knurled)3.5456
dkmin(before knurled)3.323.824.825.82
kmax10111112
kmin9.7810.7310.7311.73
small screw sizes

Slotted Cheese Small Head Screw Sizes Chart

small screw sizes
Screw Thread(d) Screw Thread(d) M1M1.2M1.4M1.6m1.8M2M2.5M3M3.5M4M5
bmin///5567.59101215
dkmax1.61.822.32.52.83.544.55.56.5
dkmin1.461.661.862.162.362.663.323.824.325.326.28
k0.70.80.911.11.21.51.822.42.7
n0.20.250.250.30.30.30.40.50.50.60.8
tmax0.50.550.60.70.750.80.951.151.31.51.6
tmin0.350.40.450.50.550.60.750.911.21.3
small screw sizes

raised countersunk head cross recessed or pozi small machine screw sizes chart

unit: mm( small screw sizes )
ddM1.6M2M2.5M3M3.5M4M5
pitchP0.350.40.450.50.60.70.8
bmin25252525383838
dkmax3.03.84.75.57.308.409.30
dkmin2.73.54.45.26.948.048.94
kmax11.21.51.652.352.72.7
drive size0011222
UNIT:MM

Small Pan Head Screws With Cross Recess Sizes Chart

small screw sizes chart
Screw ThreaddM2M2.5M3M3.5M4M5M6M8
PPitch0.40.450.50.60.70.811.25
amax0.80.911.21.41.622.5
dkmax3.54.55.56.07.09.010.514
dkmin3.24.25.25.76.648.6410.0713.57
kmax1.41.82.152.452.753.454.15.4
kmin1.261.662.012.312.613.273.85.1
rmin0.10.10.10.10.20.20.250.4
R4.56789121418
Xmax11.11.251.51.7522.53.2
socket No11222233
m2.22.63.53.84.14.86.27.7
penetration depthmax1.011.421.431.732.032.732.864.36
min0.610.861.151.452.142.263.73
small screw sizes

This is a regular small size dimensions chart, Heatfastener is a professional small screw manufacturer and supplier, if you want to know more about small screw sizes or purchase small screws, welcome to contact us

Hello, customers


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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