Date Published:May. 22. 2014

Comparison of the Dimensions of Low Profile Screws and Small Head Screws

These are comparison tables of head dimensions for standard screws, low profile screws, and small head screws.
Products with the desired dimensions may be easily selected.

Dimension comparison and product lineup for low profile and small head screws

Head shape JIS B 1176 Low Head Socket
ButtonHead withFlange 		Special Low Special Low
Hexagon
Head		  
Extra Low Head
Recess Hexagon
Socket		 Hexalobular
Socket 		Hexagon
Socket		 Hexagon
Socket
 Hexalobular
Socket 		Hexagon
Socket		 Tamper
Resistance		 - Cross
Recessed		 Hexalobular
Socket
Unit：mm
Pictures







SRSHS
SNHS-LH

 Head Height
Size
(M)
  M2 2 1.55 - 1.3 - 1.2 1.1 0.6 - - 0.5
 M2.5 2.5 1.85 - 1.6 - 1.3 1.3 0.8 - - -
 M2.6 2.6 - - - - - - - - - 0.6
 M3 3 2.4 - 2 1.65 1.3 1.3 1.3 - 0.8 0.8
 M4 4 3.1 2.8 2.8 2.2 1.5 1.5 1.5 1.5 0.9 0.9
 M5 5 3.65 3.5 3.5 2.75 1.5 1.5 - 2 - 1
 M6 6 4.4 4 4 3.3 1.5 1.5 - 2 - 1.2
 M8 8 - 5 5 4.4 1.5 1.5 - 2 - -
 M10 10 - -

6

 - - 1.5 - - - -
Line Up
Material
 Steel  Ferrosoferric Oxide Film (Black) - - SLP
(with Pilot Recess)		 SLH SFB - SSH - - - -
 Trivalent Chromate
Treatment		 - SLT-TZB - SLH-TZB -  - - - - SEQ-TZB -
Black Trivalent Chromate Treatment - - - - - - - - - SEQ-TBZ -
 Electroless Nickel Plating - - - - SFB-EL - SSH-EL - - - -
 Nickel Plating - - - - - - - - - - SET-NI
 Black Nickel Plating - - - - - - - - - - SET-BNI
 SUSXM7
(Equivalent to SUS304)		 - SLTS - SLHS SFBS SSTS SSHS
SSHS-FT
(FullThread)
SVSHS
(Ventilation Hole)		 SRSHS SNHS-LH - SETS
 SUS316L - - - SLHL - - SSHL - - - -
TW435
(Grade2 Titanium)		 - - - - - - SSHT  - - - -
 A5056 - - - - - - -  - - - SETA
 Plastic - - - SPE-LC
SPA-LC		 - - -  - - - -

Comparison of the Head Diameter of Small Head Screws and Standard Screws

Unit：mm
Head Diameter JIS B 1176 Small Head
Head Height JIS B 1176 JIS B 1176 Low Head Special Low
Head shape/Recess Hexagon
Socket		 Hexagon
Socket		 Hexagon
Socket		 Hexagon
Socket
Pictures



 
 Head Diameter
Size
(M)		 M2  3.8 3 - 3.2
M2.5 4.5 3.8 - 4
M3 5.5 4.5 4.5 5
M4 7 5.5 5.5 6
M5 8.5 7 7 8
M6 10 8.5 8.5 9
M8 13 11 11 11
M10 16 13.5 13.5 13.5
Line Up
Material
            		Steel Ferrosoferric Oxide Film (Black) - SNS-SD SLH-SD SSH-SD
Electroless Nickel Plating - SNS-SD-EL SLH-SD-EL SSH-SD-EL
SUSXM7
(Equivalent to SUS304)		 - SNSS-SD SLHS-SD SSHS-SD

Unit：mm
Head Diameter JIS B 1111* Small Head
Head shape/Recess Cross Recessed Flat Head Cross Recessed Flat Head
 Pictures
 
Head Diameter
Size
(M)		 M3 6 5
M4 8 6
M5 10 8
M6 12 10
Line Up
Material
 Steel Trivalent
Chromate
Treatment		 - SNF-SD-TZB
SUSXM7
(Equivalent to SUS304)		 - SNFS-SD
*Values for cross recessed flat head machine screws not according to ISO 7046 as regulated in the attached.




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