1. Material & Thread of Titanium Heavy Hex Bolt

• Material: titanium Grade 1, 2, 3, 5, 7, 9, 12, 16.
• Standards: ASTM B381, ASTM F468, ASME B18.2.1, ASME B1.1.
• Thread: cut thread or rolled thread; full thread or half thread.
• Compared to hex bolts, heavy hex bolts have larger head widths (F, G).
• Nominal size range: 3/8″ ~ 3″.

2. Technical Drawings for Titanium Heavy Hex Bolts

Dimensions of Titanium Heavy Hex Bolts

Nominal	E		F			G
Size	max.	min.	basic	max.	min.	max.	min.
3/8"	0.388	0.360	11/16	0.688	0.669	0.794	0.763
1/2"	0.515	0.482	7/8	0.875	0.850	1.010	0.969
5/8"	0.642	0.605	1-1/16	1.062	1.031	1.227	1.175
3/4"	0.768	0.729	1-1/4	1.250	1.212	1.443	1.383
7/8"	0.895	0.852	1-7/16	1.438	1.394	1.660	1.589
1"	1.022	0.976	1-5/8	1.625	1.575	1.876	1.796
1-1/8"	1.149	1.098	1-13/16	1.812	1.756	2.093	2.002
1-1/4"	1.277	1.223	2	2.000	1.938	2.309	2.209
1-3/8"	1.404	1.345	2-3/16	2.188	2.119	2.526	2.416
1-1/2"	1.531	1.470	2-3/8	2.375	2.300	2.742	2.622
1-5/8"	1.658	1.591	2-9/16	2.562	2.481	2.959	2.829
1-3/4"	1.785	1.716	2-3/4	2.750	2.662	3.175	3.035
1-7/8"	1.912	1.839	2-15/16	2.938	2.844	3.392	3.242
2"	2.039	1.964	3-1/8	3.125	3.025	3.608	3.449
2-1/4"	2.305	2.214	3-1/2	3.500	3.388	4.041	3.862
2-1/2"	2.559	2.461	3-7/8	3.875	3.750	4.474	4.275
2-3/4"	2.827	2.711	4-1/4	4.250	4.112	4.907	4.688
3"	3.081	2.961	4-5/8	4.625	4.475	5.340	5.102

*Unit: inch; E: full-size body diameter; F: width across flats; G: width across corners.

Nominal	H			R		LT
Size	basic	max.	min.	max.	min.	≤ 6"	> 6"
3/8"	1/4	0.268	0.226	0.03	0.01	1.000	1.250
1/2"	11/32	0.364	0.302	0.03	0.01	1.250	1.500
5/8"	27/64	0.444	0.378	0.06	0.02	1.500	1.750
3/4"	1/2	0.524	0.455	0.06	0.02	1.750	2.000
7/8"	37/64	0.604	0.531	0.06	0.02	2.000	2.250
1"	43/64	0.700	0.591	0.09	0.03	2.250	2.500
1-1/8"	3/4	0.780	0.658	0.09	0.03	2.500	2.750
1-1/4"	27/32	0.876	0.749	0.09	0.03	2.750	3.000
1-3/8"	29/32	0.940	0.810	0.09	0.03	3.000	3.250
1-1/2"	1	1.036	0.902	0.09	0.03	3.250	3.500
1-5/8"	1-3/32	1.116	0.978	0.09	0.03	3.500	3.750
1-3/4"	1-5/32	1.196	1.054	0.12	0.04	3.750	4.000
1-7/8"	1-1/4	1.276	1.130	0.12	0.04	4.000	4.250
2"	1-11/32	1.388	1.175	0.12	0.04	4.250	4.500
2-1/4"	1-1/2	1.548	1.327	0.19	0.06	4.750	5.000
2-1/2"	1-21/32	1.708	1.479	0.19	0.06	5.250	5.500
2-3/4"	1-13/16	1.869	1.632	0.19	0.06	5.750	6.000
3"	2	2.060	1.815	0.19	0.06	6.250	6.500

*Unit: inch; H: head height; R: radius of fillet; L_T: nominal thread length for bolt lengths.

Weight calculation for titanium heavy hex bolt:  Wt = ( F * F * H * 3^0.5 / 2+ π * E * E / 4 * L ) * ρ * 1.64 * 10^-5;  ρ = 4510 kg/m³.