ASME B18.9 No. 7 Head Plow Bolts Round, Countersunk, Reverse Key

Dimensions of of Dimensions of No. 7 Head Plow Bolts (Round, Countersunk, Reverse Key) (Inch)
Nominal or Basic Bolt Diameter, D [Note (1)]		Diameter of Full-Size Body,E		Diameter of Head, A			Maximum Feed Thickness,F	Head Height,S		Key Length,G
		Diameter of Full-Size Body,E		Diameter of Head, A				Head Height,S		Key Length,G
		Max.	Min.	Max.	Min. Sharp	ABS Min. With Flat		Max.	Min.	Min.	Max.
Regular Head
5/16	0.3125	0.312	0.299	0.592	0.578	0.563	0.025	0.233	0.208	0.185	0.2
3/8	0.375	0.375	0.36	0.661	0.64	0.625	0.031	0.239	0.208	0.187	0.202
7/16	0.4375	0.438	0.421	0.776	0.749	0.734	0.036	0.282	0.246	0.227	0.242
1/2	0.5	0.5	0.483	0.892	0.859	0.844	0.042	0.328	0.286	0.267	0.282
9/16	0.5625	0.592	0.544	1.021	0.984	0.969	0.045	0.383	0.388	0.321	0.336
[Note (2)]	[Note (2)]
5/8	0.625	0.657	0.606	1.121	1.078	1.063	0.05	0.414	0.364	0.348	0.363
3/4	0.75	0.782	0.729	1.277	1.234	1.219	0.05	0.44	0.39	0.375	0.39
Repair Head [Note (3)]
5/16	0.3125	0.312	0.299	0.554	0.546	0.531	0.02	0.201	0.181	0.158	0.173
3/8	0.375	0.375	0.36	0.623	0.609	0.594	0.025	0.207	0.182	0.158	0.173
7/16	0.4375	0.438	0.421	0.738	0.718	0.703	0.03	0.25	0.22	0.199	0.214
1/2	0.5	0.5	0.483	0.853	0.828	0.813	0.035	0.295	0.26	0.239	0.254
9/16	0.5625	0.592	0.544	0.984	0.953	0.938	0.04	0.352	0.312	0.293	0.308
[Note (2)]	[Note (2)]
5/8	0.625	0.657	0.606	1.077	1.046	1.031	0.04	0.378	0.338	0.321	0.336
3/4	0.75	0.782	0.729	1.234	1.203	1.188	0.04	0.404	0.364	0.347	0.362

GENERAL NOTE: For additional requirements, refer to section 2.
NOTES:
(1) Where specif ying the nominal size in decimals, zeros preceding the decimal and in the four th decimal place shall be omitted.
(2) This size is not recommended.
(3) The letter “R” shall be shown on top of the repair head to distinguish it from the regular head bolt.