Wrench Size For 3/8 Bolt

The states Bolts - Head and Wrench Sizes

Hex Commodities, Lag Bolt, Square Bolt and Heavy Hex Bolt.

hex bolt

Head and wrench size US bolts:

US Bolts
Bolt Bore (in)	Caput and Wrench Size (in)
Bolt Bore (in)	Hex Bolt Lag Commodities Square Bolt	Heavy Hex Bolt
#half dozen	ane/4
#8	i/4
#10	5/16
#12	five/16
1/4	seven/16 or three/eight
v/16	ane/2
3/8	ix/16
seven/xvi	five/8
1/ii	three/4	seven/8
9/16	xiii/16
5/8	xv/16	ane one/16
3/4	i 1/viii	1 one/iv
7/8	1 5/sixteen	1 vii/16
ane	i 1/2	1 5/8
1 1/8	one 11/16	1 -three/4
1 1/four	1 7/eight	two
1 three/8	2 1/16
i 1/two	two 1/4

i in = 25.4 mm

ANSI/ASME B18.two.ane Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Serial)

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Engineering ToolBox, (2009). US Bolts - Head and Wrench Sizes. [online] Bachelor at: https://www.engineeringtoolbox.com/the states-commodities-head-wrench-size-d_1457.html [Accessed Day Mo. Year].

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