HYTORC Nut – Mechanical tensioner

The HYTORC NUT tensioning nut is a 3 part pre-tensioning system for applications with a high degree of difficulty. The special construction allows for the bolt to move with the inner nut without shearing, reaction or torsion forces because the nut does not turn on the flange surface. The bolts are 100% mechanically tensioned. The only system in the world that is delivered pre-calibrated to bolt load. No complex and time consuming measurements therefore need to be carried out during assembly. You can work hands-free, without a reaction arm and without a backup wrench.

Applications

HYTORC NUT is especially useful when you are dealing with:

Difficulty to achieve the desired accuracy
Very high bolt loads
Galling bolts
Torsion in the bolts, particularly with long bolts
Loss of pre-tension load
Bolts that are coming loose
Limited installation space (see image)

No damage to the supporting surface

The washer does not turn along over the supporting surface, thereby preventing damage and expensive repair costs. Do you have any idea how much impact damage to the supporting surface has on the final pre-tension load in the bolt?

Functioning of HYTORC Nut

The Hytorc Nut consists of three parts: 1. the inner nut, 2. the outer nut and 3. the washer. The outer nut pulls the inner nut upwards axially. This ensures a torsion-free and shear-free connection. All of the friction and movements take place within the Hytorc Nut, which allows for the system to be delivered calibrated. This principle makes the Hytorc Nut the most accurate system in the world.

Downloads

Specifications

Metric nominal size	Imperial nominal size	Outside Ø mm	Height (H) mm	Max. stroke (T) mm	Tool
M22	7/8''	42	36	5	Type-1 (T-100)
M24	1''	46	40	6	Type-1 (T-100)
M27	1 1/8''	52	45	6	Type-1 (T-100)
M30	1 1/4''	58	50	7	Type-1 (T-100)
M33	1 3/8''	63	54	8	Type-3 (T-200)
M36	1 1/2''	69	59	8	Type-3 (T-200)
M39	-	75	64	9	Type-3 (T-200)
M42	1 5/8''	81	69	10	Type-3 (T-200)
M45	1 3/4''	86	74	10	Type-5 (T-300)
M48	1 7/8''	92	79	11	Type-8 (T-300)
M52	2''	100	86	12	Type-8 (T-300)
M56	2 1/4''	107	92	13	Type-10 (T-400)
M64	2 1/2''	123	106	15	Type-20 (T-400)
M70	2 3/4''	134	115	16	Type-35 (T-600)
M72	-	138	119	17	Type-35 (T-600)
M76	3''	146	125	18	Type-35 (T-600)
M80	-	153	132	19	Type-35 (T-600)
-	3 1/4''	161	139	20	Type-35 (T-600)
M90	3 1/2''	173	148	21	Type-35 (T-600)
M95	3 3/4''	182	157	22	Type-35 (T-600)
M100	4''	192	165	23	Type-50 (T-900)
M110	4 1/4''	211	182	26	Type-50 (T-900)
M115	4 1/2''	220	190	27	Type-50 (T-900)
M120	4 3/4''	230	198	28	Type-50 (T-900)
M125	5''	240	206	29	Type-50 (T-900)
M130	5 1/4''	249	215	30	Type-50 (T-900)
M140	5 1/2''	268	231	33	Type-50 (T-900)

Metric nominal size	Imperial nominal size	Outside Ø mm	Height (H) mm	Max. stroke (T) mm	Tool
M24	1''	47	42	25	Type-1 (T-100)
M27	1 1/8''	53	46	29	Type-1 (T-100)
M30	1 1/4''	59	55	32	Type-1 (T-100)
M33	1 3/8''	65	59	35	Type-3 (T-200)
M36	1 1/2''	70	63	38	Type-3 (T-200)
M39	1 1/2''	70	63	38	Type-3 (T-200)
M42*	1 5/8''	76	67	41	Type-3 (T-200)
M45	1 3/4''	82	70	44	Type-5 (T-300)
M48	1 7/8''	88	79	48	Type-8 (T-300)
M52	2''	94	80	51	Type-8 (T-300)
M56	2 1/4''	106	90	57	Type-10 (T-400)
M64	2 1/2''	117	103	64	Type-20 (T-400)
M70	2 3/4''	129	110	70	Type-35 (T-600)
M72	2 7/8''	133	114	72	Type-35 (T-600)
M76	3''	141	122	76	Type-35 (T-600)

Metric nominal size	Imperial nominal size	Ø1 mm	Ø2 mm	Height (H) mm	Max. stroke (T) mm	Tool
M24	1''	52	48	31	6	Stealth-2
M27	1 1/8''	59	53	35	6	Stealth-2
M30	1 1/4''	64	59	39	7	Stealth-2
M33	1 3/8''	68	64	42	8	Stealth-4
M36	1 1/2''	75	70	46	9	Stealth-4
M39	-	75	70	46	9	Stealth-4
M42	1 5/8''	83	75	50	9	Stealth-4
M45	1 3/4''	87	81	54	10	Stealth-8
M48	1 7/8''	93	86	58	11	Stealth-8
M52	2''	99	92	62	11	Stealth-8
M56	2 1/4''	109	103	69	13	Stealth-14
M64	2 1/2''	122	114	77	14	Stealth-14
M70	2 3/4''	133	125	85	16	Stealth-36
M72	-	137	127	87	16	Stealth-36
M76	3''	146	136	93	17	Stealth-36
M80	-	146	142	97	18	Stealth-36
-	3 1/4''	154	147	100	19	Stealth-36
M90	3 1/2''	169	157	108	21	Stealth-36
M95	3 3/4''	178	169	116	22	Stealth-36
M100	4''	185	178	123	23	Stealth-36
M110	4 1/4''	197	189	131	24	Stealth-36
M115	4 1/2''	208	200	139	26	Stealth-36
M120	4 3/4''	221	212	151	27	Stealth-36
M125	5''	232	224	154	29	Stealth-36
M140	5 1/2''	254	244	170	31	Stealth-36

Metric nominal size	Imperial nominal size	Outside Ø mm	Height (H) mm	Tool
M20	-	36	34	Type-1 (T-100)
M22	7/8''	36	34	Type-1 (T-100)
M24	1''	41	38	Type-1 (T-100)
M27	1 1/8''	46	43	Type-1 (T-100)
M30	1 1/4''	51	48	Type-1 (T-100)
M33	1 3/8''	56	52	Type-3 (T-200)
M36	1 1/2''	61	57	Type-3 (T-200)
M39	-	61	57	Type-3 (T-200)
M42	1 5/8''	66	62	Type-3 (T-200)
M45	1 3/4''	71	67	Type-5 (T-300)
M48	1 7/8''	76	71	Type-8 (T-300)
M52	2''	81	76	Type-8 (T-300)
M56	2 1/4''	91	86	Type-10 (T-400)
M64	2 1/2''	102	95	Type-20 (T-400)
M70	2 3/4''	112	105	Type-35 (T-600)
M72	-	115	108	Type-35 (T-600)
M76	3''	122	114	Type-35 (T-600)
M80	-	128	120	Type-35 (T-600)
-	3 1/4''	132	124	Type-35 (T-600)
M90	3 1/2''	142	133	Type-35 (T-600)
M95	3 3/4''	152	143	Type-35 (T-600)
M100	4''	163	152	Type-50 (T-900)
M110	4 1/4''	173	162	Type-50 (T-900)
M115	4 1/2''	183	171	Type-50 (T-900)
M120	4 3/4''	193	181	Type-50 (T-900)
M125	5''	203	191	Type-50 (T-900)
M130	5 1/4''	213	200	Type-50 (T-900)
M140	5 1/2''	224	210	Type-50 (T-900)

HYTORC Washer – no reaction arm needed

The unique patented system eliminates the need for reaction arms and other custom fixtures required to hold the tool in place. The HYTORC Washer is the simplest upgrade for instant improvements in safety, speed and accuracy.

• Universally applicable
• Most flexible hose swivel
• Unique and ideal placement of reaction arm:
• No forces through the tool housing
• Long lifespan
• Less maintenance

For continuous and reliable bolt load measurements.

Wind turbines, flanges, refineries or other applications - we can always offer a tensioner that suits your needs.