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Hex Nuts

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Description

Key Attributes

Specification

They are widely used in equipment, machinery, and vehicles. Smaller sizes are used in precision equipment, while larger ones are used in construction and shipbuilding sites.
Nuts with excellent heat resistance and corrosion resistance are also used in semiconductor manufacturing equipment.
➡The Semiconductor Industry and NBK's Initiatives

Hexagon nut shape and dimension

Degree of finishing: Medium (Degree of finishing for below M6: High)

Hexagon Nuts

Unit : mm

Nominal diameter of thread（d）		m		m1		s		e	φdw・φdk'
Coarse	Fine	Basic Dimension	Allowance	Basic Dimension	Allowance	Basic Dimension	Allowance	About	About
M2	-	1.6	0 -0.25	1.2	0 -0.25	4	0 -0.2	4.6	3.8
M2.5	-	2		1.6		5		5.8	4.7
M3	-	2.4		1.8		5.5		6.4	5.3
(M3.5)	-	2.8		2		6		6.9	5.8
M4	-	3.2	0 -0.30	2.4		7		8.1	6.8
M5	-	4	0 -0.30	3.2	0 -0.3	8		9.2	7.8
M6	-	5	0 -0.48	3.6	0 -0.48	10	0 -0.6	11.5	9.8
(M7)	-	5.5	0 -0.48	4.2		11	0 -0.7	12.7	10.8
M8	M8×1	6.5	0 -0.58	5		13		15	12.5
M10	M10×1.25	8		6		17		19.6	16.5
M12	M12×1.25	10		7	0 -0.58	19	0 -0.8	21.9	18
(M14)	(M14×1.5)	11	0 -0.70	8		22		25.4	21
M16	M16×1.5	13		10		24		27.7	23
(M18)	(M18×1.5)	15		11	0 -0.70	27		31.2	26
M20	M20×1.5	16		12		30		34.6	29
(M22)	(M22×1.5)	18		13		32	0 -1.0	37	31
M24	M24×2	19	0 -0.84	14		36		41.6	34
(M27)	(M27×2)	22		16		41		47.3	39
M30	M30×2	24		18		46		53.1	44
(M33)	(M33×2)	26		20	0 -0.84	50		57.7	48
M36	M36×3	29		21		55	0 -1.2	63.5	53
(M39)	(M39×3)	31	0 -1.0	23		60		69.3	57
M42		34		25		65		75	62
M45		36		27		70		80.8	67
M48		38		29		75		86.5	72
(M52)		42		31	0 -1.0	80		92.4	77
M56		45		34		85	0 -1.4	98.1	82
(M60)		48		36		90		104	87
M64		51	0 -1.2	38		95		110	92

Remark: Avoid using those with any nominal diameter of screw in parentheses as long as possible.

Recommended Hex Nut Products (special materials, miniature screws/precision screws, theft prevention)

Material：PTFE (Polytetrafluoroethylene)

・Plastic with excellent heat resistance, electrical properties, chemical resistance, and abrasion resistance; almost no chemicals can penetrate PTFE.
・It also has high flame retardance which clears the UL 94 V-0 standard.

SPT-N（Made of PTFE）

Material:PEEK

・Thermoplastic super engineering plastic superior in physical and chemical properties.
・Excellent chemical resistance. It remains almost unaffected by chemicals other than concentrated sulfuric acid, concentrated nitric acid, and concentrated hydrofluoric acid.
・With excellent heat resistance and water resistance, it retains strength at high temperatures.
・It features outstanding resistance to wear, shock, and fatigue.
・It also has high flame retardance which clears the UL 94 V-0 standard.
・・Properties and precautions for the use of plastic screws ➡Properties of plastic screws

SPE-N（Made of PEEK）

Material：Molybdenum

・Pure Molybdenum
・Melting point: 2,623℃. Excellent heat resistance.
・Cleanroom Washing/Cleanroom Packing➡Cleanroom Wash / Cleanroom Packing Service

SHNM（Made of Molybdenum）

For miniature screws and precision screws.

NBK defines "Miniature Screws" and "Precision Screws" as small screws with a thread nominal diameter of M2.6 or less. The lineup includes various materials and shapes.
Stainless steel and plastic nuts are also available for use with miniature screws and precision screws.