Heavy Hex Jam Nuts Manufacturer & Suppliers in Ghana & Africa

7 Eleven Baseline Bolts is a heavy hex jam nuts manufacturer and suppliers in Ghana, providing high-quality heavy hex jam nuts for structural, construction, engineering, machinery, and industrial applications across Ghana and Africa.

How we deliver:

Heavy hex jam nuts are thinner than standard heavy hex nuts, while maintaining the same dimensions across the flats and corners. These nuts are commonly used in two key applications:

Locking Application – A heavy hex jam nut is threaded onto a bolt and tightened against a standard heavy hex nut. This action locks the primary nut in position and helps prevent it from loosening or backing off.
Leveling Application – Jam nuts are also widely used for leveling and adjustment purposes in structural and mechanical assemblies.

Since hot-dip galvanizing adds approximately 2.2 to 5 mils of thickness to the threaded portion of a fastener, our galvanized heavy hex jam nuts are tapped oversize to ensure proper fit and compatibility with galvanized bolts.

Available

Diameters: 1/2″ – 2″
Origin: Import
Finish: Plain and hot-dip galvanized

Dimensions

Click table to show drawing

Nominal Size	F			C		H			Part Numbers
	Width Across Flats			Width Across Corners		Thickness			Part Numbers
	Basic	Max	Min	Max	Min	Basic	Max	Min	Plain	Galvanized
³⁄₈	¹¹⁄₁₆	0.688	0.669	0.794	0.763	¹⁵⁄₆₄	0.252	0.216	–	–
¹⁄₂	⁷⁄₈	0.875	0.850	1.010	0.969	¹⁹⁄₆₄	0.317	0.277	–	–
⁵⁄₈	1¹⁄₁₆	1.062	1.031	1.227	1.175	²³⁄₆₄	0.381	0.337	–	–
³⁄₄	1¹⁄₄	1.250	1.212	1.443	1.382	²⁷⁄₆₄	0.446	0.398	–	18404
⁷⁄₈	1⁷⁄₁₆	1.438	1.394	1.660	1.589	³¹⁄₆₄	0.510	0.458	–	–
1	1⁵⁄₈	1.625	1.575	1.876	1.796	³⁵⁄₆₄	0.575	0.519	17112	17113
1¹⁄₈	1¹³⁄₁₆	1.812	1.756	2.093	2.002	³⁹⁄₆₄	0.639	0.579	–	–
1¹⁄₄	2	2.000	1.938	2.309	2.209	²³⁄₃₂	0.751	0.687	17114	17115
1³⁄₈	2¹³⁄₁₆	2.188	2.119	2.526	2.416	²⁵⁄₃₂	0.815	0.747	–	–
1¹⁄₂	2³⁄₈	2.375	2.300	2.742	2.622	²⁷⁄₃₂	0.880	0.808	17116	17117
1⁵⁄₈	2⁹⁄₁₆	2.562	2.481	2.959	2.828	²⁹⁄₃₂	0.944	0.868	–	–
1³⁄₄	2³⁄₄	2.750	2.662	3.175	3.035	³¹⁄₃₂	1.009	0.929	17118	17119
1⁷⁄₈	2¹⁵⁄₁₆	2.938	2.844	3.392	3.242	1¹⁄₃₂	1.073	0.989	–	–
2	3¹⁄₈	3.125	3.025	3.608	3.449	1³⁄₃₂	1.138	1.050	17120	17121
2¹⁄₄	3¹⁄₂	3.500	3.388	4.041	3.862	1¹³⁄₆₄	1.251	1.155	19847	19846
2¹⁄₂	3⁷⁄₈	3.875	3.750	4.474	4.275	1²⁹⁄₆₄	1.505	1.401	–	–
2³⁄₄	4¹⁄₄	4.250	4.112	4.907	4.688	1³⁷⁄₆₄	1.634	1.522	–	–
3	4⁵⁄₈	4.625	4.475	5.340	5.102	1⁴⁵⁄₆₄	1.763	1.643	–	–
3¹⁄₄	5	5.000	4.838	5.774	5.515	1¹³⁄₁₆	1.876	1.748	–	–
3¹⁄₂	5³⁄₈	5.375	5.200	6.207	5.928	1¹⁵⁄₁₆	2.006	1.870	–	–
3³⁄₄	5³⁄₄	5.750	5.562	6.640	6.341	2¹⁄₁₆	2.134	1.990	–	–
4	6¹⁄₈	6.125	5.925	7.073	6.755	2³⁄₁₆	2.264	2.112	–	–
Dimensions per ASME B18.2.2 1987 (R 1999)