ASME B18.2.6M Bolt Dimension | BigBoltNut

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ASME B18.2.6M Bolt Dimension

ASME B18.2.6M Bolt Dimension

Dimensional Standard of Bolts per ASME B18.2.6M

• For hot-dip galvanized nuts, the dimensions apply before galvanizing.
• P is the pitch of thread.
• dw, max. = actual
• β = 15⁰ to 30⁰
• Incomplete thread u = 2P.

Thread Size d		M12	M16	M20	M22	M24	M27	M30	M36
P	Pitch	1.75	2.00	2.50	2.50	3.00	3.00	3.50	4.00
d_s	max	12.70	16.70	20.84	22.84	24.84	27.84	30.84	37.00
d_s	min	11.30	15.30	19.16	21.16	23.16	26.16	29.16	35.00
s	max	21.00	27.00	34.00	36.00	41.00	46.00	50.00	60.00
s	min	20.16	26.16	33.00	35.00	40.00	45.00	49.00	58.80
e	max	24.25	31.18	39.26	41.57	47.34	53.12	57.74	69.28
e	min	22.78	29.56	37.29	39.55	45.20	50.85	55.37	66.44
k	max	7.95	10.75	13.40	14.90	15.90	17.90	19.75	23.55
k	min	7.05	9.25	11.60	13.10	14.10	16.10	17.65	21.45
r	min	0.60	0.60	0.80	0.80	1.00	1.20	1.20	1.50
(b)	Ref.	25.00	31.00	36.00	38.00	41.00	44.00	49.00	56.00