Name: Butterfly Screw
Brand: Shenzhen Xintegu Hardware Co.,Ltd.

Butterfly Screw

A butterfly screw, also known as a wing screw or thumb screw, is a type of fastener that features two large, wing-like projections on its head, allowing for easy manual turning without the need for tools. This design facilitates quick and frequent adjustments, making butterfly screws particularly useful in applications where components need to be assembled or adjusted often and easily.

Butterfly Screw Key Features

Ease of Use: The prominent wings provide a secure grip for tightening or loosening the screw by hand, ideal for quick changes or adjustments.

Material: Typically made from metals like stainless steel, brass, or plastic, depending on the required strength and resistance to corrosion.

Design Variability: Butterfly screws come in various sizes and thread patterns to suit different materials and thicknesses.

Specifications of Butterfly Screw

Thread size d
P	Pitch
d₂	Maximum
d₂	Minimum
d₃	Maximum
d₃	Minimum
e	Maximum
e	Minimum
g	Maximum
g	Minimum
G	Maximum
G	Minimum
h	Maximum
h	Minimum
m	Maximum
m	Minimum
a	Maximum
r₁	≈
r₂	≈
r₃	≈
r₄	≈
①, Material: a) Forgeable cast iron GT: GTS or GTW is determined by the manufacturer; b) Steel St: Forging or cold working is determined by the manufacturer; c) Copper-zinc alloy CuZn: Forgeable alloy or cast alloy is determined by the manufacturer; d) Austenitic stainless steel A: Grade is determined by the manufacturer

M4	M5	M6	M8	M10	M12	M16	M20	M24
0.7	0.8	1	1.25	1.5	1.75	2	2.5	3
8	11	13	16	20	23	29	35	44
6	8	10	13	17	20	26	32	41
7	9	11	12.5	16.5	19.5	23	29	37.5
5.5	7.5	9	10.5	14.5	17.5	21	27	35
20	26	33	39	51	65	73	90	110
18	24	30	36	48	62	70	86	106
1.9	2.3	2.3	2.8	4.4	4.9	6.4	6.9	9.4
1.1	1.5	1.5	2	3.6	4.1	5.6	6.1	8.6
2.3	2.8	3.3	4.4	5.4	6.4	7.5	8	10.5
1.7	2.3	2.7	3.6	4.6	5.6	6.5	7	9.5
10.5	13	17	20	25	33.5	37.5	46.5	56.5
8.5	11	15	18	23	31	35	44	53.5
4.6	6.5	8	10	12	14	17	21	25
3.2	4	5	6.5	8	10	13	16	20
2.1	2.4	3	4	4.5	5.3	6	7.5	9
3	4	5	6	8	10	11	14	18
/	/	/	/	1	1	1.2	1.6	2.5
0.5	1	1	1	1.2	1.2	1.6	2	2.5
2	2.5	3	3	5	6	7	8	9