Heavy Hex Bolt

Heavy Hex Bolt (Inches)

Dimensions (mm)	3/8"	1/2"	5/8"	3/4"	7/8"	1"	1-1/8"	1-1/4"	1-3/8"	1-1/2"	1-5/8"	1-3/4"	1-7/8"	2"	2-1/4"	2-1/2"	2-3/4"	3"
A/F	17.4752	22.225	26.9748	31.75	36.5252	41.275	46.0248	50.8	55.5752		65.0748	69.85	74.6252	79.375	88.9	98.425	107.95	117.475
THICK	6.8072	9.2456	11.2776	13.3096	15.3416	17.78	19.812	22.2504	23.876	26.3144	28.3464	30.3784	32.4104	33.9852	39.3192	43.3832	47.4726	52.324
A/C	20.1676	25.654	31.1658	36.6522	42.164	47.6504	53.1622	58.6486	64.1604	69.6468	75.1586	80.645	86.1568	91.6432	102.6414	113.6396	124.6378	135.636
RM Diam for Forge Route	10	12.7	16	20	22	25.4	28.5	31.75	36	39	42	45	45	50.8	58	65	70	75
Hex Head Forg Weight	0.0172	0.0365	0.0645	0.1041	0.1574	0.2309	0.3182	0.4331	0.5546	0.0000	0.8970	1.1050	1.3430	1.5910	2.3000	3.1034	4.0771	5.3116
Length (mm)	Weight/Pc
12	0.02041	0.04251	0.07457	0.11923	0.18009	0.25924	0.35505	0.48043	0.61226	0.78733	0.98079	1.20302	1.43600	1.72220	2.46790	3.37480	4.33430	5.61940
14	0.02131	0.04411	0.07712	0.12296	0.18548	0.26601	0.36374	0.49143	0.62559	0.80335	0.99985	1.22522	1.45820	1.75160	2.50540	3.43170	4.39120	5.68730
16	0.02221	0.04570	0.07968	0.12669	0.19088	0.27278	0.37243	0.50243	0.63892	0.81937	1.01891	1.24740	1.48040	1.78110	2.54290	3.48860	4.44810	5.75520
18	0.02311	0.04729	0.08224	0.13042	0.19627	0.27955	0.38112	0.51343	0.65225	0.83540	1.03800	1.26960	1.50260	1.81050	2.58040	3.54550	4.50500	5.82310
20	0.02401	0.04888	0.08479	0.13415	0.20167	0.28632	0.38981	0.52442	0.66558	0.85142	1.05700	1.29180	1.52480	1.84000	2.61790	3.60240	4.56180	5.89100
22	0.02491	0.05047	0.08735	0.13789	0.20706	0.29308	0.39849	0.53542	0.67891	0.86744	1.07610	1.31400	1.54700	1.86940	2.65540	3.65920	4.61870	5.95890
25	0.02626	0.05286	0.09118	0.14348	0.21515	0.30324	0.41153	0.55192	0.69891	0.89148	1.10470	1.34730	1.58030	1.91360	2.71160	3.74460	4.70410	6.06070
28	0.02762	0.05525	0.09502	0.14908	0.22324	0.31339	0.42456	0.56841	0.71890	0.91551	1.13330	1.38060	1.61360	1.95770	2.76780	3.82990	4.78940	6.16260
30	0.02852	0.05684	0.09757	0.15281	0.22864	0.32016	0.43325	0.57941	0.73223	0.93153	1.15230	1.40280	1.63580	1.98720	2.80530	3.88680	4.84630	6.23050
35	0.03077	0.06082	0.10396	0.16214	0.24212	0.33708	0.45497	0.60690	0.76556	0.97159	1.20000	1.45830	1.69130	2.06080	2.89910	4.02900	4.98850	6.40020
40	0.03302	0.06480	0.11035	0.17147	0.25560	0.35400	0.47670	0.63439	0.79889	1.01160	1.24760	1.51380	1.74680	2.13440	2.99280	4.17120	5.13070	6.57000
45	0.03527	0.06878	0.11674	0.18080	0.26909	0.37092	0.49842	0.66189	0.83222	1.05170	1.29530	1.56940	1.80230	2.20800	3.08650	4.31340	5.27290	6.73970
50	0.03752	0.07276	0.12313	0.19012	0.28257	0.38784	0.52014	0.68938	0.86555	1.09180	1.34290	1.62490	1.85780	2.28170	3.18030	4.45570	5.41520	6.90950
55	0.03978	0.07674	0.12952	0.19945	0.29606	0.40476	0.54187	0.71687	0.89887	1.13180	1.39060	1.68040	1.91330	2.35530	3.27400	4.59790	5.55740	7.07920
60	0.04203	0.08072	0.13591	0.20878	0.30954	0.42168	0.56359	0.74437	0.93220	1.17190	1.43820	1.73590	1.96880	2.42890	3.36780	4.74010	5.69960	7.24900
65	0.04428	0.08470	0.14230	0.21811	0.32303	0.43860	0.58531	0.77186	0.96553	1.21190	1.48590	1.79140	2.02430	2.50250	3.46150	4.88230	5.84180	7.41880
70	0.04653	0.08868	0.14869	0.22744	0.33651	0.45552	0.60703	0.79935	0.99886	1.25200	1.53350	1.84690	2.07980	2.57610	3.55520	5.02450	5.98400	7.58850
75	0.04878	0.09266	0.15508	0.23677	0.35000	0.47244	0.62876	0.82685	1.03220	1.29210	1.58120	1.90240	2.13530	2.64970	3.64900	5.16680	6.12630	7.75830
80	0.05103	0.09664	0.16147	0.24609	0.36348	0.48936	0.65048	0.85434	1.06550	1.33210	1.62880	1.95790	2.19080	2.72340	3.74270	5.30900	6.26850	7.92800
85	0.05329	0.10062	0.16787	0.25542	0.37697	0.50629	0.67220	0.88183	1.09880	1.37220	1.67650	2.01340	2.24630	2.79700	3.83640	5.45120	6.41070	8.09780
90	0.05554	0.10460	0.17426	0.26475	0.39045	0.52321	0.69393	0.90932	1.13220	1.41220	1.72410	2.06890	2.30180	2.87060	3.93020	5.59340	6.55290	8.26750
95	0.05779	0.10858	0.18065	0.27408	0.40393	0.54013	0.71565	0.93682	1.16550	1.45230	1.77180	2.12440	2.35740	2.94420	4.02390	5.73560	6.69510	8.43730
100	0.06004	0.11256	0.18704	0.28341	0.41742	0.55705	0.73737	0.96431	1.19880	1.49230	1.81940	2.17990	2.41290	3.01780	4.11760	5.87790	6.83740	8.60700
110	0.06455	0.12052	0.19982	0.30206	0.44439	0.59089	0.78082	1.01930	1.26550	1.57250	1.91470	2.29090	2.52390	3.16510	4.30510	6.16230	7.12180	8.94650
120	0.06905	0.12848	0.21260	0.32072	0.47136	0.62473	0.82426	1.07428	1.33213	1.65257	2.01002	2.40193	2.63488	3.31231	4.49258	6.44674	7.40624	9.28605
130	0.07355	0.13644	0.22538	0.33938	0.49833	0.65857	0.86771	1.12927	1.39879	1.73269	2.10532	2.51294	2.74589	3.45954	4.68005	6.73118	7.69068	9.62556
140	0.07806	0.14440	0.23816	0.35803	0.52529	0.69241	0.91115	1.18425	1.46544	1.81281	2.20062	2.62395	2.85690	3.60678	4.86752	7.01562	7.97512	9.96507
150	0.08256	0.15236	0.25094	0.37669	0.55226	0.72626	0.95460	1.23924	1.53210	1.89292	2.29592	2.73496	2.96791	3.75401	5.05499	7.30006	8.25956	10.30458
160	0.08706	0.16032	0.26372	0.39535	0.57923	0.76010	0.99805	1.29423	1.59875	1.97304	2.39122	2.84597	3.07892	3.90125	5.24246	7.58450	8.54400	10.64409
170	0.09157	0.16828	0.27650	0.41400	0.60620	0.79394	1.04149	1.34921	1.66541	2.05315	2.48652	2.95698	3.18993	4.04848	5.42993	7.86894	8.82844	10.98360
180	0.09607	0.17624	0.28928	0.43266	0.63317	0.82778	1.08494	1.40420	1.73206	2.13327	2.58182	3.06799	3.30094	4.19572	5.61740	8.15338	9.11287	11.32310
190	0.10058	0.18420	0.30206	0.45132	0.66014	0.86162	1.12838	1.45918	1.79872	2.21338	2.67712	3.17900	3.41195	4.34295	5.80488	8.43782	9.39731	11.66261
200	0.10508	0.19216	0.31484	0.46997	0.68711	0.89546	1.17183	1.51417	1.86537	2.29350	2.77242	3.29001	3.52296	4.49019	5.99235	8.72226	9.68175	12.00212
210	0.10958	0.20012	0.32762	0.48863	0.71408	0.92930	1.21527	1.56916	1.93203	2.37361	2.86772	3.40102	3.63397	4.63742	6.17982	9.00669	9.96619	12.34163
220	0.11409	0.20808	0.34040	0.50728	0.74105	0.96315	1.25872	1.62414	1.99868	2.45373	2.96302	3.51204	3.74498	4.78466	6.36729	9.29113	10.25063	12.68114
230	0.11859	0.21604	0.35318	0.52594	0.76802	0.99699	1.30216	1.67913	2.06534	2.53385	3.05832	3.62305	3.85599	4.93189	6.55476	9.57557	10.53507	13.02065
240	0.12310	0.22400	0.36596	0.54460	0.79498	1.03083	1.34561	1.73411	2.13199	2.61396	3.15362	3.73406	3.96700	5.07913	6.74223	9.86001	10.81951	13.36016
250	0.12760	0.23195	0.37875	0.56325	0.82195	1.06467	1.38906	1.78910	2.19865	2.69408	3.24892	3.84507	4.07802	5.22636	6.92970	10.14445	11.10395	13.69967
260	0.13210	0.23991	0.39153	0.58191	0.84892	1.09851	1.43250	1.84408	2.26530	2.77419	3.34422	3.95608	4.18903	5.37360	7.11717	10.42889	11.38839	14.03918
270	0.13661	0.24787	0.40431	0.60057	0.87589	1.13235	1.47595	1.89907	2.33196	2.85431	3.43952	4.06709	4.30004	5.52083	7.30464	10.71333	11.67283	14.37869
280	0.14111	0.25583	0.41709	0.61922	0.90286	1.16620	1.51939	1.95406	2.39862	2.93442	3.53482	4.17810	4.41105	5.66807	7.49211	10.99777	11.95727	14.71820
290	0.14561	0.26379	0.42987	0.63788	0.92983	1.20004	1.56284	2.00904	2.46527	3.01454	3.63012	4.28911	4.52206	5.81530	7.67958	11.28221	12.24170	15.05770
300	0.15012	0.27175	0.44265	0.65654	0.95680	1.23388	1.60628	2.06403	2.53193	3.09465	3.72542	4.40012	4.63307	5.96254	7.86705	11.56665	12.52614	15.39721
310	0.15462	0.27971	0.45543	0.67519	0.98377	1.26772	1.64973	2.11901	2.59858	3.17477	3.82072	4.51113	4.74408	6.10977	8.05452	11.85109	12.81058	15.73672
320	0.15913	0.28767	0.46821	0.69385	1.01074	1.30156	1.69318	2.17400	2.66524	3.25489	3.91602	4.62214	4.85509	6.25701	8.24200	12.13553	13.09502	16.07623
330	0.16363	0.29563	0.48099	0.71251	1.03771	1.33540	1.73662	2.22899	2.73189	3.33500	4.01132	4.73315	4.96610	6.40424	8.42947	12.41996	13.37946	16.41574
340	0.16813	0.30359	0.49377	0.73116	1.06468	1.36925	1.78007	2.28397	2.79855	3.41512	4.10662	4.84416	5.07711	6.55148	8.61694	12.70440	13.66390	16.75525
350	0.17264	0.31155	0.50655	0.74982	1.09164	1.40309	1.82351	2.33896	2.86520	3.49523	4.20192	4.95517	5.18812	6.69871	8.80441	12.98884	13.94834	17.09476
360	0.17714	0.31951	0.51933	0.76848	1.11861	1.43693	1.86696	2.39394	2.93186	3.57535	4.29722	5.06618	5.29913	6.84595	8.99188	13.27328	14.23278	17.43427
370	0.18164	0.32747	0.53211	0.78713	1.14558	1.47077	1.91040	2.44893	2.99851	3.65546	4.39252	5.17719	5.41014	6.99318	9.17935	13.55772	14.51722	17.77378
380	0.18615	0.33543	0.54489	0.80579	1.17255	1.50461	1.95385	2.50392	3.06517	3.73558	4.48782	5.28820	5.52115	7.14042	9.36682	13.84216	14.80166	18.11329
390	0.19065	0.34339	0.55767	0.82445	1.19952	1.53845	1.99730	2.55890	3.13182	3.81569	4.58312	5.39921	5.63216	7.28765	9.55429	14.12660	15.08610	18.45280
400	0.19516	0.35135	0.57045	0.84310	1.22649	1.57229	2.04074	2.61389	3.19848	3.89581	4.67842	5.51022	5.74317	7.43489	9.74176	14.41104	15.37054	18.79230

Heavy Hex Bolt (Metric)

Dimensions (mm)	M12	M16	M20	M22	M24	M27	M30	M36
A/F	21	27	34	36	41	46	50	60
Thickness	7.95	10.75	13.4	14.9	15.9	17.9	19.75	23.55
A/C	24.25	31.18	39.26	41.57	47.34	51.34	57.74	69.28
Hex Head Weight	0.02848	0.06182	0.12015	0.14873	0.20505	0.28865	0.37442	0.63791
Bolt Length (mm)	Weight / PC
12	-	-	-	-	-	-	-	-
14	0.03572	-	-	-	-	-	-	-
16	0.03746	-	-	-	-	-	-	-
18	0.03919	0.08048	-	-	-	-	-	-
20	0.04093	0.08314	-	-	-	-	-	-
22	0.04266	0.08580	0.15773	-	-	-	-	-
25	0.04440	0.08978	0.16400	0.20680	-	-	-	-
28	0.04700	0.09377	0.17026	0.21489	0.27740	-	-	-
30	0.04961	0.09643	0.17443	0.22029	0.28343	0.40274	-	-
35	0.05134	0.10307	0.18487	0.23377	0.29852	0.42430	0.52258	-
40	0.05568	0.10971	0.19531	0.24726	0.31360	0.44585	0.54632	0.89176
45	0.06002	0.11636	0.20575	0.26074	0.32869	0.46741	0.57006	0.92673
50	0.06436	0.12300	0.21619	0.27422	0.34377	0.48897	0.59381	0.96171
55	0.06870	0.12965	0.22662	0.28771	0.35886	0.51053	0.61755	0.99669
60	0.07304	0.13629	0.23706	0.30119	0.37394	0.53209	0.64129	1.03167
65	0.07738	0.14293	0.24750	0.31468	0.38903	0.55365	0.66503	1.06665
70	0.08172	0.14958	0.25794	0.32816	0.40411	0.57521	0.68878	1.10162
75	0.08606	0.15622	0.26838	0.34165	0.41920	0.59676	0.71252	1.13660
80	0.09040	0.16286	0.27881	0.35513	0.43428	0.61832	0.73626	1.17158
85	0.09474	0.16951	0.28925	0.36862	0.44937	0.63988	0.76000	1.20656
90	0.09908	0.17615	0.29969	0.38210	0.46445	0.66144	0.78375	1.24154
95	0.10342	0.18280	0.31013	0.39559	0.47954	0.68300	0.80749	1.27652
100	0.10776	0.18944	0.32056	0.40907	0.49462	0.70456	0.83123	1.31149
110	0.11210	0.20273	0.34144	0.43604	0.52479	0.74767	0.87872	1.38145
120	0.12078	0.21601	0.36232	0.46301	0.55497	0.79079	0.92620	1.45141
130	0.12946	0.22930	0.38319	0.48998	0.58514	0.83391	0.97369	1.52136
140	0.13814	0.24259	0.40407	0.51695	0.61531	0.87703	1.02117	1.59132
150	0.14682	0.25588	0.42494	0.54391	0.64548	0.92014	1.06866	1.66128
160	0.15550	0.26916	0.44582	0.57088	0.67565	0.96326	1.11614	1.73123
170	0.16418	0.28245	0.46669	0.59785	0.70582	1.00638	1.16363	1.80119
180	0.17286	0.29574	0.48757	0.62482	0.73599	1.04949	1.21111	1.87115
190	0.18154	0.30903	0.50845	0.65179	0.76616	1.09261	1.25860	1.94110
200	0.19022	0.32232	0.52932	0.67876	0.79633	1.13573	1.30608	2.01106

Heavy hex bolts are designed with a wider and thicker head than standard hex bolts, providing a greater bearing surface and improved
load distribution. They are commonly used in structural steel construction, ASME/ASTM-grade flange connections, heavy machinery,
bridge construction, and high-temperature applications where standard hex bolts would not provide sufficient clamping force.

The inch size heavy hex bolt weight chart above covers diameters from 3/8″ through 3″, with dimensions including across-flats (A/F),
thickness, across-corners (A/C), and forging weights for reference. The metric heavy hex bolt chart covers M12 through M36 with the same dimensional breakdown, helping engineers compare inch and metric specifications side by side.

Weight values are given per piece in kilograms and vary by both diameter and length. For bulk procurement, multiply the per-piece
weight by the required quantity to estimate total shipment weight. Ananka Fasteners supplies heavy hex bolts in stainless steel, carbon
steel, alloy steel, and a range of coated finishes to suit corrosive and high-load environments.

For a complete reference of all fastener weights, visit our Weight Charts page. You can also compare with our standard
Hex Bolt Weight Chart Without Nuts for regular hex bolt weight data.