Hex Jam Nuts

Description:

Hex jam nuts from ITA Fasteners are thin nuts which have the same dimensions as the standard hex nut for the head alone. Its primary application lies in fastening the standard nut into place by being threaded onto a bolt and made to run tight against the parent nut. This will ensure that the bolts do not move out of place and will be securely held against vibrations and small and constant movements. In another use, these nuts are used as a leveler to even out surfaces of operations.

It is available in stainless steel, carbon steel, and alloy steel to bear more wear and tear. Since these nuts are galvanised, they are incredibly durable can be easily used in high strength applications as long as the axial pressure on the body is low. They are also corrosion resistant. These nuts are mostly used to fasten soft materials which will break if a thicker fastener is used.

Dimensional Standards:

ASME B18.2.2

Size range:

Metric: Nil
Inches: Nil

Hex Jam Nuts Dimensions

Dimensions of Hex Flat Nuts and Hex Flat Jam Nuts

Nominal size	Basic Major Diameter of Thread	Width Across Flats, F [Note (2)]			Width Across Corners, G [Note(3)]		Thickness Hex Flat Nuts , H			Thickness Hex Flat Jam Nuts, H1			Bearing Surface Runout to Thread Axis, FIM
Nominal size	Basic Major Diameter of Thread			Basic	Min.	Max.	Min.	Max.	Basic	Min.	Max.	Basic	Bearing Surface Runout to Thread Axis, FIM	Min.	Max.
1 1/8	1.1250	1 11⁄16	1.631	1.688	1.859	1.949	1	0.970	1.030	5/8	0.595	0.655	0.029
1 ¼	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 3/32	1.062	1.126	¾	0.718	0.782	0.032
1 3/8	1.3750	2 1/16	1.994	2.062	2.273	2.382	1 13⁄64	1.169	1.237	13⁄16	0.778	0.846	0.035
1 ½	1.5000	2 ¼	2.175	2.250	2.48	2.598	1 5/16	1.276	1.348	7/8	0.839	0.911	0.039

Dimensions of Hex Nuts and Hex Jam Nuts

										Maximum Runout of Bearing Surface to Thread Axis, FIM
										Hex Nuts
										Specified Proof Load		Hex Jam Nuts
Nominal size	Basic Major Diameter of Thread	Width Across Flats, F		Width Across Corners, G		Thickness Hex Flat Nuts , H		Thickness Hex Jam Nuts, H1		Up to 150,000 psi	150,000 psi and Greater	All Strength Levels
Nominal size	Basic Major Diameter of Thread	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Up to 150,000 psi	150,000 psi and Greater	All Strength Levels
¼	0.2500	0.428	0.438	0.488	0.505	0.212	0.226	0.150	0.163	0.015	0.01	0.015
5/16	0.3125	0.489	0.5	0.557	0.577	0.258	0.273	0.180	0.195	0.016	0.011	0.016
3/8	0.3750	0.551	0.563	0.628	0.650	0.320	0.337	0.210	0.227	0.017	0.012	0.017
7/16	0.4375	0.675	0.688	0.768	0.794	0.365	0.385	0.240	0.260	0.018	0.013	0.018
½	0.5000	0.736	0.750	0.840	0.866	0.427	0.448	0.302	0.323	0.019	0.014	0.019
9/16	0.5625	0.861	0.875	0.982	1.010	0.473	0.496	0.301	0.324	0.0200	0.015	0.02
5/8	0.6250	0.922	0.938	1.051	1.083	0.535	0.559	0.363	0.387	0.021	0.016	0.021
¾	0.7500	1.088	1.125	1.240	1.299	0.617	0.665	0.398	0.446	0.023	0.018	0.023
7/8	0.875	1.269	1.312	1.447	1.516	0.724	0.776	0.458	0.510	0.025	0.02	0.025
1	1	1.45	1.5	1.653	1.732	0.831	0.887	0.519	0.575	0.027	0.022	0.027
1 1/8	1.1250	1.631	1.688	1.859	1.949	0.939	0.999	0.579	0.639	0.030	0.025	0.03
1 ¼	1.2500	1.812	1.875	2.066	2.165	1.030	1.094	0.687	0.751	0.033	0.028	0.033
1 3/8	1.3750	1.994	2.062	2.273	2.382	1.138	1.206	0.747	0.815	0.036	0.031	0.036
1 ½	1.5	2.175	2.250	2.480	2.598	1.245	1.317	0.808	0.880	0.039	0.034	0.039
1 5/8	1.625	2.35	2.43	2.679	2.805	1.364	1.416	0.868	0.944	0.044	0.038	0.044
1 ¾	1.7500	2.538	2.625	2.893	3.031	1.460	1.540	0.929	1.009	0.048	0.041	0.048
1 7/8	1.8750	2.722	2.813	3.103	3.247	1.567	1.651	0.989	1.073	0.051	0.044	0.051
2	2.0000	2.900	3.000	3.306	3.464	1.675	1.763	1.050	1.138	0.055	0.047	0.055
2 ¼	2.2500	3.263	3.375	3.719	3.897	1.890	1.986	1.155	1.267	0.061	0.052	0.061
2 ½	2.5000	3.625	3.75	4.133	4.33	2.105	2.209	1.401	1.427	0.068	0.058	0.068
2 ¾	2.7500	3.988	4.125	4.546	4.763	2.319	2.431	1.522	1.556	0.074	0.064	0.074
3	3.0000	4.350	4.500	4.959	5.196	2.534	2.654	1.643	1.685	0.081	0.07	0.081
3 ¼	3.25	4.713	4.875	5.373	5.629	2.749	2.877	1.748	1.814	0.087	0.075	0.087
3 ½	3.5000	5.075	5.250	5.786	6.062	2.964	3.100	1.870	1.943	0.094	0.081	0.094
3 ¾	3.7500	5.438	5.625	6.199	6.495	3.178	3.322	1.990	2.072	0.100	0.087	0.100
4	4.0000	5.800	6.000	6.612	6.928	3.393	3.545	2.112	2.201	0.107	0.093	0.107

HEX JAM NUT- METRIC

ANSI B18.2.4.5 M and B18 2.4.6 M

Nominal Diameter Thread Pitch	Width S		Width E		Thickness M		Bearing Diameter D_W	Thickness C
Nominal Diameter Thread Pitch	Metric Hex Jam Nuts
	Max	Min	Max	Min	Max	Min	Min	C	Min
M5 × 0.8	8	7.78	9.24	8.79	2.7	2.45	6.9	...	...
M6 × 1	10	9.78	11.55	11.05	3.2	2.9	8.9	...	...
M8 × 1.25	13	12.73	15.01	14.38	4	3.7	11.6	...	...
aM10 × 1.5	15	14.73	17.32	16.64	5	4.7	13.6	...	...
M10 × 1.5	16	15.73	18.48	17.77	5	4.7	14.6	...	...
M12 × 1.75	18	17.73	20.78	20.03	6	5.7	16.6	...	...
M14 × 2	21	20.67	24.25	23.35	7	6.42	19.6	...	...
M16 × 2	24	23.67	27.71	26.75	8	7.42	22.5	...	...
M20 × 2.5	30	29.16	34.64	32.95	10	9.1	27.7	0.8	0.4
M24 × 3	36	35	41.57	39.55	12	10.9	33.2	0.8	0.4
M30 × 3.5	46	45	53.12	50.85	15	13.9	42.7	0.8	0.4
M36 × 4	55	53.8	63.51	60.79	18	16.9	51.1	0.8	0.4

Metric Heavy Hex Nuts
M12 × 1.75	21	20.16	24.25	22.78	12.3	11.9	19.2	0.8	0.4
M14 × 2	24	23.16	27.71	26.17	14.3	13.6	22	0.8	0.4
M16 × 2	27	26.16	31.18	29.56	17.1	16.4	24.9	0.8	0.4
M20 × 2.5	34	33	39.26	37.29	20.7	19.4	31.4	0.8	0.4
M22 × 2.5	36	35	41.57	39.55	23.6	22.3	33.3	0.8	0.4
M24 × 3	41	40	47.34	45.2	24.2	22.9	38	0.8	0.4
M27 × 3	46	45	53.12	50.85	27.6	26.3	42.8	0.8	0.4
M30 × 3.5	50	49	57.74	55.37	30.7	29.1	46.6	0.8	0.4
M36 × 4	60	58.8	69.28	66.44	36.6	35	55.9	0.8	0.4
M42 × 4.5	70	67.9	80.83	77.41	42	40.4	64.5	1	0.5
M48 × 5	80	77.6	92.38	88.46	48	46.4	73.7	1	0.5
M56 × 5.5	90	87.2	103.92	99.41	56	54.1	82.8	1	0.5
M64 × 6	100	96.8	115.47	110.35	64	62.1	92	1	0.5
M72 × 6	110	106.4	127.02	121.3	72	70.1	101.1	1.2	0.6
M80 × 6	120	116	138.56	132.24	80	78.1	110.2	1.2	0.6
M90 × 6	135	130.5	155.88	148.77	90	87.8	124	1.2	0.6
M100 × 6	150	145	173.21	165.3	100	97.8	137.8	1.2	0.6