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Button Head Screws

What is a button head screw, and how is it different from other screws?

A button-head screw is a type of screw that has a low profile round head and is slightly domed. Button head screw is different from the standard flat or countersunk head screws because it has a round head that blends with the surface when tightened or slightly protrudes above the surface. This makes button head screws ideal for applications where one wants a neat and smooth appearance.

This head shape ensures that pressure is spread evenly, thus not harming the surface or material used when tightening. Even when compared to the flat head or Pan Head Screws, the benefits of Button Head Screws are visible externally and used functionally in different types of applications in the automotive electronics industries, construction and furniture industries and many more.

Button Head Screw Standard, Button Head Cap Screws, Button Head Cap Screws Stockist, ASME B18.3 Button Head Screws, ISO 7380 Button Head Screws, Button Head Screws Supplier In Mumbai, India.

Table Of Content

About Button Head Screws

Button Head Screws Specification

Stock Availability of Button Head Screws

Button Head Screws Ready Stock

Button Head Screws Applications and Uses

Supply & Export Destinations of Button Head Screws

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What are common industrial applications of button head screws?

These screws are commonly used in various industries and sectors because of the design made to serve certain purpose. They are ideally utilised in the automotive industry to join body-in-white parts, interior trims, engines and electrical and electronics. Owing to the low profile head and sleek design, they are applied in the electronics industry to support circuits, boards, panels, and other sensitive equipment. Button Head Screws are particularly for use in wooden furniture production facilities as well as woodworking to hold different components together. Although how a Button Head Screw fastens is clean and orderly, it compromises the holding power.

They are also found in aerospace and marine industries mainly because the products developed are made from materials that will not be affected by certain conditions. Button head screws are commonly used in the manufacturing of machinery and equipment to ensure a tight and fast assembly. They are preferred in many industries and for various purposes because they are versatile and can be used in precise and other general applications.

Button Head Screws Specification

Size Range:	M3 to M12
Dimensional Standards	ISO 7380, DIN9427, BS 4168, ASME B18.3.4M
Length	12mm, 25mm, 35mm, 10mm
Screws Types	Button Head Screws
Tolerance	+/-0.01mm to +/-0.05mm
Threads	METRIC, BSW, BSF, UNC, UNF or as required
UTS – Unified Thread Standard	UNC, UNF, UNEF, UNS, NPT, NPTF
Application	Wind Tower, Nuclear Power, Railway, Automotive Industry, Construction, Electronic Industry
Screws Packaging	Cartoon Box / Wooden Pallet / Wooden Box / Thread Protector
Screws Forming	Hot Forged & Cold Forged
Certification	Dual Certified As per ASTM & ASME Codes

Button Head Screws Stock Availability

Stainless Steel Button Head Screws

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Carbon Steel Button Head Screws

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Alloy Steel Button Head Screws

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“View Button Head Screw Dimensions, Contact us today to know Button Head Cap Screw best offers & prices.”

Dimensions Chart

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Button Head Screw Dimensions

Thread d		M3	M4	M5	M6	M8	M10	M12	M16
P		0,5	0,7	0,8	1	1,25	1,5	1,75	2
b	ref.	18	20	22	24	28	32	36	44
c	max.	0,7	0,8	1	1,2	1,5	2	2,4	2,8
c	min.	0,55	0,65	0,8	1	1,25	1,7	2,1	2,5
da	max.	3,6	4,7	5,7	6,8	9,2	11,2	13,7	17,7
dc	max.	6,9	9,4	11,8	13,6	17,8	21,9	26	34
dc	min.	6,32	8,82	11,1	12,9	17,1	21,06	25,16	33
dk	max.	5,2	7,2	8,8	10	13,2	16,5	19,4	26
dk	min.	4,9	6,8	8,4	9,6	12,8	16,1	18,9	25,5
dL	ref.	2,6	3,8	5	6	7,7	10	12	16
ds	max.	3	4	5	6	8	10	12	16
ds	min.	2,86	3,82	4,82	5,82	7,78	9,78	11,73	15,73
dw	min.	5,74	8,24	10,4	12,2	16,4	20,22	24,32	32
e	min.	2,303	2,873	3,443	4,583	5,723	6,863	9,149	11,429
k	max.	1,65	2,2	2,75	3,3	4,4	5,5	6,6	8,8
k	min.	1,4	1,95	2,5	3	4,1	5,2	6,24	8,44
r1	max.	3,7	4,6	5,75	6,15	7,95	9,8	11,2	15,3
r1	min.	3,3	4,2	5,25	5,65	7,45	9,2	10,5	14,5
rs	min.	0,1	0,2	0,2	0,25	0,4	0,4	0,6	0,6
rt	min.	0,3	0,4	0,45	0,5	0,7	0,7	1,1	1,1
s	nom.	2	2,5	3	4	5	6	8	10
	max.	2,08	2,58	3,08	4,095	5,14	6,14	8,175	10,175
	min.	2,02	2,52	3,02	4,02	5,02	6,02	8,025	10,025
t	min.	1,04	1,3	1,56	2,08	2,6	3,12	4,16	5,2
w	min.	0,2	0,3	0,38	0,74	1,05	1,45	1,63	2,25

Thread d			M3		M4		M5		M6		M8		M10		M12		M16
l			ls and fg
l			ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg	ls	lg
nom.	min.	max.	min	max.	min	max.	min	max.	min	max.	min	max.	min	max.	min	max.	min	max.
6	5,76	6,24	+	+	+	+
8	7,71	8,29	+	+	+	+	+	+
10	9,71	10,29	+	+	+	+	+	+	+	+
12	11,65	12,35	+	+	+	+	+	+	+	+	+	+
16	15,65	16,35	+	+	+	+	+	+	+	+	+	+	+	+
20	19,58	20,42	+	+	+	+	+	+	+	+	+	+	+	+	+	+
25	24,58	25,42	4,5	7	+	+	+	+	+	+	+	+	+	+	+	+	+	+
30	29,58	30,42	9,5	12	6,5	10	4	8	+	+	+	+	+	+	+	+	+	+
35	34,5	35,5			11,5	15	9	13	6	11	+	+	+	+	+	+	+	+
40	39,5	40,5			16,5	20	14	18	11	16	5,75	12	+	+	+	+	+	+
45	44,5	45,5					19	23	16	21	10,75	17	5,5	13	+	+	+	+
50	49,5	50,5					24	28	21	26	15,75	22	10,5	18	+	+	+	+
55	54,4	55,6							26	31	20,75	27	15,5	23	10,25	19	+	+
60	59,4	60,6							31	36	25,75	32	20,5	28	15,25	24	+	+
65	64,4	65,6									30,75	37	25,5	33	20,25	29	11	21
70	69,4	70,6									35,75	42	30,5	38	25,25	34	16	26
80	79,4	80,6									45,75	52	40,5	48	35,25	44	26	36
90	89,4	90,6											50,5	58	45,25	54	36	46

Button Head Screw Size Chart

inal Size	A		H		S	J	T	F		L	Tensile Test Load	Single Shear Strength of Body	Seating Torques in./lbs.
	Head Diameter		Head Height		Head Side Height	Hex Socket Size	Key Engage- ment	Fillet Transition Diameter		Max Standard Length
	Max	Min	Max	Min	Ref	Nom	Min	Max	Min	Nom	Lb.	Lbs., Min.	Coarse Thread	Fine Thread
4	0.213	0.201	0.059	0.051	0.015	1/16	0.035	0.132	0.122	0.50	840	950	7.0	8.
6	0.262	0.250	0.073	0.063	0.015	5/64	0.044	0.158	0.148	0.63	1,260	1,400	13.	15.
8	0.312	0.298	0.087	0.077	0.015	3/32	0.052	0.194	0.184	0.75	1,940	2,000	25.	26.
10	0.361	0.347	0.101	0.091	0.020	1/8	0.070	0.220	0.210	1.00	2,440	2,700	45.	48.
1/4	0.437	0.419	0.132	0.122	0.031	5/32	0.087	0.290	0.280	1.00	4,430	4,700	95.	110.
5/16	0.547	0.527	0.166	0.152	0.031	3/16	0.105	0.353	0.343	1.00	7,300	7,300	190.	210.
3/8	0.656	0.636	0.199	0.185	0.031	7/32	0.122	0.415	0.405	1.25	10,800	10,600	300.	300.
1/2	0.875	0.851	0.265	0.245	0.046	5/16	0.175	0.560	0.540	2.00	19,800	18,800	900.	960.
5/8	1.000	0.970	0.331	0.311	0.062	3/8	0.210	0.685	0.665	2.00	31,500	29,400	1,700	1,900

Tolerance on Length			Nominal Screw Size				Nominal Screw Length
			Nominal Screw Size				Up to 1 in., Inclusive				Over 1 in. to 2-1/2 in., Inclusive
			0 thru 3/8, Inclusive				-0.03				-0.04
			1/2 and 5/8, Inclusive				-0.03				-0.06

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Button Head Screws Applications and Uses

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