Date Updated:May. 27. 2025

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.

Comparison of the Head Heights of Low Profile Screws and Standard Screws

Unit：mm
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
Pictures
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	2.2	1.5	1.5	1.5	1.5	0.9	0.9
	M5		5	3.65	3.5	2.75	1.5	1.5	-	2	-	1
	M6		6	4.4	4	3.3	1.5	1.5	-	2	-	1.2
	M8		8	-	5	4.4	1.5	1.5	-	2	-	-
	M10		10	-	6	-	-	1.5	-	-	-	-
	M12		12	-	-	-	-	-	-	-	-	-
	M16		16	-	-	-	-	-	-	-	-	-
Part Number
Material	Steel	Ferrosoferric Oxide Film (Black)	SNS SNS-J SNS-M-P	-	SLH	SFB	-	SSH	-	-	-	-
		Trivalent Chromate Treatment	SNS-TZB	SLT-TZB	SLH-TZB	-	-	-	-	-	SEQ-TZB	-
		Black Trivalent Chromate Treatment	-	-	-	-	-	-	-	-	SEQ-TBZ	-
		Electroless Nickel Plating	SNS-EL	-	-	SFB-EL	-	SSH-EL	-	-	-	-
		Nickel Plating	-	-	-	-	-	-	-	-	-	SET-NI
		Black Nickel Plating	-	-	-	-	-	-	-	-	-	SET-BNI
	SUSXM7 (Equivalent to SUS304)		SNSS SNSS-J SNSS-M-P	SLTS	SLHS	SFBS	SSTS	SSHS	SRSHS	SNHS-LH	-	SETS
	SUS316L		-	-	SLHL	-	-	SSHL	-	-	-	-
	TW435 (Grade2 Titanium)		-	-	-	-	-	SSHT	-	-	-	-
	A5056		-	-	-	-	-	-	-	-	-	SETA
	Hastelloy		-	-	-	-	-	SSHH	-	-	-	-
	Plastic	PEEK	SPE-C	SPE-LH	SPE-LC	-	SPE-SH	-	-	-	-	-
		RENY	SPA-C	SPA-LH	SPA-LC	-	SPA-SH	-	-	-	-	-
		PPS	SPS-C	SPS-LH	SPS-LC	-	SPS-SH	-	-	-	-	-

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
Part Number
Material	Steel	Ferrosoferric Oxide Film (Black)	SNS	SNS-SD	SLH-SD	SSH-SD
		Electroless Nickel Plating	SNS-EL	SNS-SD-EL	SLH-SD-EL	SSH-SD-EL
		Electroless Nickel Plating (Nylon Patch)	-	SNS-SD-EL-ALK	-	SSH-SD-EL-ALK
	SUSXM7 (Equivalent to SUS304)	-	SNSS	SNSS-SD	SLHS-SD	SSHS-SD
		- (Nylon Patch)	-	SNSS-SD-ALK	-	SSHS-SD-ALK
		MoS2 Coating	-	SNSS-SD-MO	-	SSHS-SD-MO
		Fluorine Coating	-	SNSS-SD-FC	-	SSHS-SD-FC
	SUS316L		-	SNSL-SD	-	SSHL-SD
	Titanium		-	SNST-SD	-	-

Comparison of the Head Diameter of Flat Head Machine Screws and Standard Screws

Unit：mm
Head Diameter			JIS B 1111^＊1		Small Head
Head Height			JIS B 1111	Low Head	Low Head
Head shape/Recess			Cross Recessed Flat Head	Cross Recessed Flat Head	Cross Recessed Flat Head
Pictures
Head Diameter
Size (M)		M3	6	6	5
		M4	8	8	6
		M5	10	10	8
		M6	12	12	10
		M8	16	16	-
Head Height
Size (M)		M3	1.75	1.2	1.3
		M4	2.3	1.5	1.4
		M5	2.8	2	1.9
		M6	3.4	2.3	2.4
		M8	4.4	-	-
Part Number
Material	Steel	Ferrosoferric Oxide Film (Black)	SNFC^＊2	-	-
		Trivalent Chromate Treatment	-	-	SNF-SD-TZB
		Black Trivalent Chromate Treatment	-	SNF-TBZ-SUC	-
	SUSXM7 (Equivalent to SUS304)		SNFCS^＊3	SNFS-SUC	SNFS-SD
	Titanium		SNFT SNFTG	-	-
	Molybdenum		SNFCM	-	-
	Plastic	PEEK	SPE-F	-	-
		RENY	SPA-F	-	-
		PC	SPC-F	-	-
		PPS	SPS-F	-	-

＊1　Values for cross recessed flat head machine screws not according to ISO 7046 as regulated in the attached.
＊2　SNFC is a Flat Head Socket Cap Screws compliant with the Japanese Socket Screw Industry Cooperative Standard SSS 002. For detailed dimensions, please refer to product page.
＊3　SNFCS is a Flat Head Socket Cap Screws compliant with JIS B 1194. For detailed dimensions, please refer to product page.

Inch Screws

Hexalobular Socket Head Cap Screw with Extra Low Profile
SET-TZB(INCH)

Hexalobular Socket Head Cap Screw with Extra Low Profile
(Stainless Steel)
SETS(INCH)

Hex Socket Head Cap Screw with Small Head
SNSS-SD(INCH)

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