High Tensile Fasteners

High Tensile Hexagonal Head fasteners are available in 8.8 and 10.9 grades for Bolts/Screws and grades 8 and 10 for nuts.

These fasteners are available in Metric, BSW, BSF, UNC and UNF threads.

Finishes: Black Phosphated, Zinc plated, Yellow Zinc Plated, Cadmium Plated, Nickel Plated, Chromium Plated and Hot Dip Galvanized.

Size Range

High Tensile Hex Bolts/Screws

M3 x 10mm to M42 x 400mm generally conforming to IS 1364 (Part 1) -2002 DIN 931 ISO 4014-1999 for Bolts & IS 1364 (Part 2) -2002 DIN 933 ISO 4017 for Screws
1/4” x 1/2” to 2” x 12” in BSW and BSF thread generally conforming to BS 1083-1965
1/4” x 1/2” to 2” x 12” in UNC & UNF threads generally conforming to BS 1768-1963

High Tensile Nuts

M4 to M52 generally conforming to IS 1364 (Part 3) -2002
1/4” to 2” in BSW and BSF thread generally conforming to BS 1083-1965
1/4” to 2” in UNC & UNF threads generally conforming to BS 1768-1963

High Tensile Washers

M12 to M48 generally conforming to IS 6649-1985

High Tensile Friction Grip Bolts (Structural Bolts)

M16 X 40 to M30 x 200 generally conforming to IS 3757 -1985 for Bolts and IS 6623-2004 for Nuts

Track Shoe Bolts with Square Nuts

5/8”UNF x 2 1/4”
3/4”UNF x 2 3/8”
7/8”UNF x 2 5/8”

Prevailing Torque Type Nuts with Nylon insert (Nyloc Nuts)

M3 to M48 generally conforming to IS 7002 - 2005
3/16” to 2” in BSW, UNC, UNF and BSF

EN-8 Threaded Rod

M10 to M24

Disk-Lock Washers

M10 to M24

DIA	M4	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36	M39	M42	M45	M48	M52
Pitch	0.7	0.8	1	1.25	1.5	1.75	2		2.5			3		3.5		4		4.5		5
Grade A upto length	40	50	60	80	100	120	140	150					Grade A not applicable to these dia’s
Head Across Flat (S) Nom = Max Min Grade A Grade B	7	8	10	13	16	18	21	24	27	30	34	36	41	46	50	55	60	65	70	75	80
	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67	33.38	35.38	Grade A not applicable to these dia’s
	6.64	7.64	9.64	12.57	15.57	17.57	20.16	23.16	26.16	29.16	33	35	40	45	49	53.8	58.8	63.1	68.1	73.1	78.1
Head Height (K) Nom Tol + or – Grade A Grade B	2.8	3.5	4	5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17	18.7	21	22.5	25	26	28	30	33
	0.125	0.15			0.18				0.215				Grade A not applicable to these dia’s
	0.2	0.24			0.29				0.35					0.42							0.5
Across corners e Min Grade A Grade B	7.66	8.79	11.05	14.38	17.77	20.03	23.36	26.75	30.14	33.53	37.72	39.98	Grade A not applicable to these dia’s
Across corners e Min Grade A Grade B	7.5	8.63	10.89	14.2	17.59	19.85	22.78	26.17	29.56	32.95	37.29	39.55	45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25
Thread Length (b) For lengths < or = 125mm For lengths > 125mm <= 200mm For lengths > 200mm	14	16	18	22	26	30	34	38	42	46	50	54	60	66	Not specified as full thread recommended
	20	22	24	28	32	36	40	44	48	52	56	60	66	72	78	84	90	96	102	108	116
	33	35	37	41	45	49	53	57	61	65	69	73	79	85	91	97	103	109	115	121	129
Major Dia at thread (min)	3.838	4.826	5.794	7.76	9.732	11.701	13.682	15.682	17.623	19.623	21.623	23.577	26.577	29.522	32.522	35.465	38.465	41.437	44.437	47.399	51.399
Major Dia at thread (max)	3.978	4.976	5.974	7.972	9.968	11.966	13.962	15.962	17.958	19.958	21.958	23.952	26.952	29.947	32.947	35.94	38.94	41.937	44.937	47.929	51.929

HIGH TENSILE HEX BOLTS IN BSW/BSF THREADS TO BS 1083-1965

All dimensions in Inches

DIA	1/4	5/16	3/8	7/16	1/2	9/16	5/8	3/4	7/8	1	1 1/8	1 1/4	1 3/8	1 1/2	1 3/4	2
BSW Pitch (TPI)	20	18	16	14	12	12	11	10	9	8	7	7		6	5	4.5
BSF PITCH (TPI)	26	22	20	18	16	16	14	12	11	10	9	9	8	8	7	7
Head Across Flat (S) Min Max	0.438	0.518	0.592	0.702	0.812	0.912	1.000	1.190	1.288	1.468	1.640	1.815	2.005	2.175	2.520	2.700
Head Across Flat (S) Min Max	0.445	0.525	0.600	0.710	0.820	0.920	1.010	1.200	1.300	1.480	1.670	1.860	2.050	2.220	2.580	2.760
Head height (K) Min Max	0.166	0.208	0.250	0.292	0.333	0.365	0.407	0.480	0.563	0.636	0.710	0.790	0.880	0.960	1.110	1.270
Head height (K) Min Max	0.176	0.218	0.260	0.302	0.343	0.375	0.417	0.500	0.583	0.666	0.750	0.830	0.920	1.000	1.170	1.330
Across corners e Max	0.51	0.61	0.69	0.82	0.95	1.06	1.17	1.39	1.50	1.71	1.93	2.15	2.37	2.56	2.98	3.19
Thread Length b Min	Twice the Dia (2D)
Major Dia at thread BSW (min)	0.2427	0.3046	0.3666	0.4285	0.4904	0.5527	0.6147	0.7390	0.8653	0.9897	1.1140	1.2388		1.4879	1.7369	1.9862
Major Dia at thread BSW (max)	0.2488	0.3112	0.3736	0.4360	0.4985	0.5609	0.6233	0.7482	0.8750	1.000	1.1250	1.250		1.500	1.750	2.000
Major Dia at thread BSF (min)	0.2432	0.3051	0.3671	0.4290	0.4910	0.5533	0.6153	0.7394	0.8658	0.9902	1.1148	1.2395	1.3640	1.4888	1.7380	1.9876
Major Dia at thread BSF (max)	0.2489	0.3113	0.3737	0.4361	0.4985	0.5610	0.6234	0.7482	0.8750	1.000	1.1250	1.250	1.375	1.500	1.750	2.000

HIGH TENSILE HEX BOLTS UNC/UNF THREADS TO BS 1768-1963

All dimensions in Inches

DIA	1/4	5/16	3/8	7/16	1/2	9/16	5/8	3/4	7/8	1	1 1/8	1 1/4	1 3/8	1 1/2	1 3/4	2
UNC Pitch (TPI)	20	18	16	14	13	12	11	10	9	8	7	7	6	6	5	4.5
UNF Pitch (TPI)	28	24	24	24	20	20	18	16	14	12	NOT RECOMMENDED
Head Across Flat (S) Min Max	0.430	0.493	0.554	0.617	0.742	0.804	0.929	1.115	1.300	1.488	1.657	1.830	2.017	2.205	2.565	2.940
Head Across Flat (S) Min Max	0.437	0.500	0.562	0.625	0.750	0.812	0.937	1.125	1.312	1.500	1.687	1.875	2.062	2.250	2.625	3.000
Head Height (K) Min Max	0.153	0.201	0.233	0.281	0.313	0.361	0.393	0.463	0.543	0.597	0.678	0.773	0.838	0.934	1.074	1.203
Head Height (K) Min Max	0.163	0.211	0.243	0.291	0.323	0.371	0.403	0.483	0.563	0.627	0.718	0.813	0.878	0.974	1.134	1.263
Across corners e (MAX)	0.505	0.577	0.650	0.722	0.866	0.938	1.083	1.300	1.515	1.732	1.948	2.165	2.382	2.598	3.031	3.464
Thread Length b (Min)	2D + 1/4” upto bolt length of 6” and 2D + 1/2” for bolt lengths above 6”
Major Dia at thread ( Class 2A) Min for UNC	0.2408	0.3026	0.3643	0.4258	0.4876	0.5495	0.6113	0.7353	0.8592	0.9830	1.1064	1.2314	1.3544	1.4794	1.7268	1.9751
Major Dia at thread (2A) Min for UNF	0.2425	0.3042	0.3667	0.4281	0.4906	0.5524	0.6149	0.7391	0.8631	0.9868	NOT RECOMMENDED
Major Dia at thread Class 2A Max for UNC	0.2490	0.3113	0.3737	0.4361	0.4985	0.5609	0.6234	0.7482	0.8731	0.9980	1.1228	1.2478	1.3726	1.4976	1.7473	1.9971

All dimensions in mm

DIA	M4	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36	M39	M42	M45	M48	M52
Pitch	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	3.5	4	4	4.5	4.5	5	5
Across Flat (S) Max Min	7	8	10	13	16	18	21	24	27	30	34	36	41	46	50	55	60	65	70	75	80
Across Flat (S) Max Min	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.16	29.16	33	35	40	45	49	53.8	58.8	63.1	68.1	73.1	78.1
Thickness (M) Max Min	3.2	4.7	5.2	6.8	8.4	10.8	12.8	14.8	15.8	18	19.4	21.5	23.8	25.6	28.7	31	33.4	34	36	38	42
Thickness (M) Max Min	2.9	4.4	4.9	6.44	8.04	10.37	12.1	14.1	15.1	16.9	18.1	20.2	22.5	24.3	27.4	29.4	31.8	32.4	34.4	36.4	40.4
Across corners (E) Min	7.66	8.79	11.05	14.38	17.77	20.03	23.35	26.75	29.56	32.95	37.29	39.55	45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25
Minor Dia at thread (min)	3.242	4.134	4.917	6.647	8.376	10.106	11.835	13.835	15.294	17.294	19.294	20.752	23.752	26.211	29.211	31.67	34.67	37.129	40.129	42.587	46.587
Minor Dia at thread (max)	3.422	4.334	5.153	6.912	8.676	10.441	12.210	14.210	15.744	17.774	19.774	21.252	24.252	26.771	29.771	32.27	35.27	37.799	40.799	43.297	47.297

All dimensions in mm

DIA	M4	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36	M39	M42	M45	M48	M52
Pitch	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	3.5	4	4	4.5	4.5	5	5
Across Flat (S) Max Min	7	8	10	13	16	18	21	24	27	30	34	36	41	46	50	55	60	65	70	75	80
Across Flat (S) Max Min	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.16	29.16	33	35	40	45	49	53.8	58.8	63.1	68.1	73.1	78.1
Thickness (M) Max Min	3.2	4.7	5.2	6.8	8.4	10.8	12.8	14.8	15.8	18	19.4	21.5	23.8	25.6	28.7	31	33.4	34	36	38	42
Thickness (M) Max Min	2.9	4.4	4.9	6.44	8.04	10.37	12.1	14.1	15.1	16.9	18.1	20.2	22.5	24.3	27.4	29.4	31.8	32.4	34.4	36.4	40.4
Across corners (E) Min	7.66	8.79	11.05	14.38	17.77	20.03	23.35	26.75	29.56	32.95	37.29	39.55	45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25
Minor Dia at thread (min)	3.242	4.134	4.917	6.647	8.376	10.106	11.835	13.835	15.294	17.294	19.294	20.752	23.752	26.211	29.211	31.67	34.67	37.129	40.129	42.587	46.587
Minor Dia at thread (max)	3.422	4.334	5.153	6.912	8.676	10.441	12.210	14.210	15.744	17.774	19.774	21.252	24.252	26.771	29.771	32.27	35.27	37.799	40.799	43.297	47.297

HIGH TENSILE HEX NUTS IN BSW/BSF THREADS TO BS 1083-1965 THREADS TO BS 84

All dimensions in inches

DIA	1/4	5/16	3/8	7/16	1/2	9/16	5/8	3/4	7/8	1	1 1/8	1 1/4	1 3/8	1 1/2	1 3/4	2
BSW Pitch (TPI)	20	18	16	14	12	12	11	10	9	8	7	7	-	6	5	4.5
BSF PITCH (TPI)	26	22	20	18	16	16	14	12	11	10	9	9	8	8	7	7
WIDTH Across Flat (S) Min Max	0.438	0.518	0.592	0.702	0.812	0.912	1.000	1.190	1.288	1.468	1.640	1.815	2.005	2.175	2.520	2.700
WIDTH Across Flat (S) Min Max	0.445	0.525	0.600	0.710	0.820	0.920	1.010	1.200	1.300	1.480	1.670	1.860	2.050	2.220	2.580	2.760
Thickness (M) Min Max	0.190	0.240	0.302	0.365	0.427	0.490	0.552	0.677	0.740	0.865	0.990	1.105	1.230	1.355	1.605	1.730
Thickness (M) Min Max	0.200	0.250	0.312	0.375	0.437	0.500	0.562	0.687	0.750	0.875	1.000	1.125	1.250	1.375	1.625	1.750
Across corners (Max inches)	0.51	0.61	0.69	0.82	0.95	1.06	1.17	1.39	1.50	1.71	1.93	2.15	2.37	2.56	2.98	3.19
Minor Dia at thread BSW (min)	0.1860	0.2413	0.2950	0.3461	0.3932	0.4557	0.5086	0.6220	0.7328	0.8400	0.9420	1.0670	-	1.2866	1.4938	1.7154
Minor Dia at thread BSW (max)	0.2030	0.2594	0.3145	0.3674	0.4169	0.4794	0.5338	0.6490	0.7620	0.8720	0.9776	1.1026	-	1.3269	1.5408	1.7668
Minor Dia at thread BSF (min)	0.2008	0.2543	0.3110	0.3663	0.4200	0.4825	0.5336	0.6432	0.7586	0.8720	0.9828	1.1078	1.2150	1.3400	1.5670	1.8170
Minor Dia at thread BSF (max)	0.2125	0.2684	0.3280	0.3844	0.4395	0.5020	0.5549	0.6669	0.7838	0.8990	1.0120	1.1370	1.2470	1.3720	1.6026	1.8526

HIGH TENSILE HEX NUTS IN UNC/UNF THREADS TO BS 1768-1963 THREADS TO BS 1580

All dimensions in inches

DIA	1/4	5/16	3/8	7/16	1/2	9/16	5/8	3/4	7/8	1	1 1/8	1 1/4	1 3/8	1 1/2	1 3/4	2
UNC Pitch (TPI)	20	18	16	14	13	12	11	10	9	8	7	7	6	6	5	4.5
UNF Pitch (TPI)	28	24	24	24	20	20	18	16	14	12	NOT RECOMMENDED
Width Across Flat (S) Min Max	0.430	0.493	0.554	0.617	0.742	0.804	0.929	1.115	1.300	1.488	1.657	1.830	2.017	2.205	2.565	2.940
Width Across Flat (S) Min Max	0.437	0.500	0.562	0.625	0.750	0.812	0.937	1.125	1.312	1.500	1.687	1.875	2.062	2.250	2.625	3.000
Thickness (M) Min Max	0.214	0.261	0.323	0.370	0.432	0.479	0.542	0.631	0.740	0.844	0.949	1.037	1.147	1.251	1.470	1.684
Thickness (M) Min Max	0.224	0.271	0.333	0.380	0.442	0.489	0.552	0.651	0.760	0.874	0.989	1.087	1.197	1.311	1.530	1.754
Across corners (E) Max	0.505	0.577	0.650	0.722	0.866	0.938	1.083	1.300	1.515	1.732	1.948	2.165	2.382	2.598	3.031	3.464
Minor Dia at thread (min) UNC (2B)	0.1960	0.2520	0.3070	0.3600	0.4170	0.4720	0.5270	0.6420	0.7550	0.8650	0.9700	1.0950	1.1950	1.3200	1.5340	1.7590
Minor Dia at thread (max) UNC (2B)	0.2070	0.2650	0.3210	0.3760	0.4340	0.4900	0.5460	0.6630	0.7780	0.8900	0.9980	1.1230	1.2250	1.3500	1.5680	1.7950
Minor Dia at thread (min) UNF (2B)	0.2110	0.2670	0.3300	0.3830	0.4460	0.5020	0.5650	0.6820	0.7980	0.9100	NOT RECOMMENDED
Minor Dia at thread (max) UNF (2B)	0.2200	0.2770	0.3400	0.3950	0.4570	0.5150	0.5780				NOT RECOMMENDED

All dimensions in mm

DIA	M12	M16	M20	M22	M24	M27	M30	M36
Weight in Kgs for 100 nos	0.703	1.46	1.96	2.43	3.06	5.02	6.32	11.50
Outer Dia (Max) d2	24	30	37	39	44	50	56	66
Inner Dia (Min) d1	13	17	21	23	25	28	31	37
Thickness (S)	3	4	4	4	4	5	5	6
Tolerance for OD Minus(-)	0.52		0.62			1	1.20
Tolerance for ID Plus(+)	0.27		0.33			0.52	0.62
Tolerance for thickness + or -	0.30					0.60

All dimensions in mm

DIA	M16	M20	M22	M24	M27	M30	M36
Pitch	2	2.5	2.5	3	3	3.5	4
Thread Length for Bolt length <= 100	31	36	38	41	44	49	56
Thread Length for Bolt length > 100	38	43	45	48	51	56	63
Head Across Flat (B) Min	26.16	33	35	40	45	49	58.8
Head Across Flat (B) Max	27	34	36	41	46	50	60
Head Height (H) Nom Tolerance + or -	10	12.5	14	15	17	18.7	22.5
Head Height (H) Nom Tolerance + or -	0.75	0.90				1.05
Across corners C min	29.56	37.29	39.55	45.20	50.85	55.37	66.44
Major Dia at thread (min)	15.682	19.623	21.623	23.577	26.577	29.522	35.465
Major Dia at thread (max)	15.962	19.958	21.958	23.952	26.952	29.947	35.94

HIGH STRENGTH FRICTION GRIP HEX NUTS IN MM THREADS TO IS 6623-1985 GRADES 8S & 10S

All dimensions in mm

DIA	M16	M20	M22	M24	M27	M30	M36
Pitch	2	2.5	2.5	3	3	3.5	4
Head Across Flat (B) Min	26.16	33	35	40	45	49	58.8
Head Across Flat (B) Max	27	34	36	41	46	50	60
Height (H) Min Max	16.4	19.4	22.3	22.9	26.3	29.1	35
Height (H) Min Max	17.1	20.7	23.6	24.2	27.6	30.7	36.6
Across corners C min	29.56	37.29	39.55	45.20	50.85	55.37	66.44
Minor Dia at thread (min)	14.235	17.694	19.694	21.202	24.252	26.761	32.270
Minor Dia at thread (max)	14.610	18.144	20.144	21.702	24.752	27.321	32.870

All dimensions in mm

DIA	M3	M4	M5	M6	M8	M10	M12	M16	M20	M24	M30	M36
Pitch	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2.5	3	3.5	4
Across Flat (S) Tolerance Minus (-)	5.5	7	8	10	13	16	18	24	30	36	46	55
Across Flat (S) Tolerance Minus (-)	0.18	0.22			0.27			0.33	0.84	1		1.2
Height (H) Max Min	4.5	6	6.8	8	9.5	11.9	14.9	19.1	22.8	27.1	32.6	38.9
Height (H) Max Min	4.02	5.52	6.22	7.42	8.92	11.2	14.2	17.8	20.7	25	30.1	36.4
Across corners e min	6.01	7.66	8.79	11.05	14.38	17.77	20.03	26.75	32.95	39.55	50.85	60.79
Minor Dia at thread (min)	2.850	3.242	4.134	4.917	6.647	8.376	10.106	13.835	17.294	20.752	26.211	31.67
Minor Dia at thread (max)	3.010	3.422	4.334	5.153	6.912	8.676	10.441	14.210	17.774	21.252	26.771	32.27

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