Bolts

As one of the leading bolt manufacturers in Europe, Bea has established itself as a trusted provider of high-performance fastening solutions tailored to meet the rigorous demands of various industries. We continuously refine our processes to produce bolts that deliver exceptional strength, durability, and reliability. Whether you're in need of standard fasteners or custom solutions, Bea offers a comprehensive range, including hex head bolts, round head socket cap-screws made primarily with special materials, and specialized options designed for specific applications. With our extensive experience and state-of-the-art facilities, we ensure that every bolt we manufacture meets the highest industry standards, making us a preferred choice for businesses seeking reliable bolt nut manufacturers.

Technical specifications

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The advantages of high-quality bolts and their applications

Choosing high-quality bolts is crucial for ensuring the structural integrity and longevity of any project. Bea’s bolts are engineered to provide outstanding performance under extreme conditions, offering unmatched resistance to stress, corrosion, and wear. This makes them ideal for a wide range of applications, from construction and infrastructure projects to heavy machinery and equipment. As a leading hex bolt manufacturer in Italy and Europe, we know the crucial role bolts play in structural stability and safety, that is why we produce bolts that consistently exceed industry standards.
Our custom bolt manufacturing capabilities allow us to create tailored solutions for unique applications, ensuring that our clients receive bolts that are perfectly suited to their specific needs. Whether you require standard or special bolts, Bea's products deliver the reliability and performance needed to ensure the success of your projects across various industries.

Materials used in custom bolt manufacturing

At Bea Group, we produce stud bolts from a variety of high-performance materials, including austenitic stainless steel, alloy steel, and super duplex alloys. Bea’s manufacturing process includes thread rolling, which ensures superior tensile strength and durability compared to traditional cutting methods. This technique not only boosts production efficiency but also guarantees a uniform thread profile, critical for applications requiring precise fastening solutions. With Bea’s advanced production capabilities, each stud bolt is manufactured to meet the specific needs of your project, ensuring the highest standards of quality and performance.

ASTM A453 660 /1.4980

Highly creep and corrosion resistant, precipitation hardening austenitic steel. Scaling resistance in air up to appr. 800°C.

UNS S32760 / ASTM A182 F55

Ferritic-austenitic stainless steel. Excellent corrosion resistance against general corrosion, stress corrosion cracking, corrosion fatigue, pitting, crevice and erosion corrosion and possessing very high mechanical strength properties.

ALLOY 718

High temperature, precipitation hardening, nickel-base alloy with particularly high hot strength and yield strength up to 750°C, and excellent creep behaviour up to 700°C. The markedly higher hot strength compare with normal hot work steels in particularly noticeable when used for hot work tools with high mechanical and thermal stresses.

ALLOY 625

Is a non-magnetic, corrosion and oxidation – resistance, nickel based alloy. High toughness and strength in the temperature range cryogenic to 1000°C. The alloy as excellent fatigue strength and stress corrosion cracking resistance to chloride ions.

ALLOY 925

Is as age-hardenable nickel-iron-chromium alloy. Is used in various applications requiring a combination of high strength and corrosion resistance.

MONEL 400

Is a solid-solution alloy that can be hardened only by cold working. It has high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments. It is widely used in many fields, especially marine and chemical processing.

MONEL 500

Is a nickel-copper alloy with combines the excellent corrosion resistance of Monel 400 with the added advantages of greater strength and hardness. The increased properties are obtained by adding aluminium and titanium to the nickel-copper base by heating.

DUPLEX

Ferritic-austenitic stainless steel also referred to as DUPLEX STAINLESS STEELS, combine many of beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localised and uniform corrosion. The duplex microstructure contributes to the high strength and high resistance to stress corrosion cracking.

SUPERDUPLEX

A Super Duplex stainless steel is a type of Duplex stainless steel with enhanced corrosion resistance which is categorised by its PREN being greater than 40. The Pitting Resistance Equivalent Number (PREN) is widely used as a means of comparing the relative corrosion resistance of different steel grades.

ASTM A193

Standard Speciﬁcation for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications.

ASTM A320

Standard Speciﬁcation for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service.

ASTM F467

Standard Speciﬁcation for Nonferrous Nuts for General Use.

ASTM F468

Standard Speciﬁcation for Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs for General Use.

Bolts techincal specifications

DIMENSIONS OF SOCKET HEAD CAP SCREWS in mm - ANSI/ASME B 18.3 - TABLE 1A
Nominal Size	D		A		H		C	J	T	LT
	Body		Head		Head		Chamfer	Hex Socket	Key	Thread
	Diameter		Diameter		Height			Size	Engagement	Length
	min	max	min	max	min	max	max	Nom	min
1/4	6,18	6,35	9,27	9,53	6,20	6,35	0,64	4,78	3,05	25,40
5/16	7,57	7,94	11,61	11,91	7,77	7,92	0,84	6,35	3,84	28,40
3/8	9,14	9,53	13,97	14,27	9,35	9,53	1,02	7,92	4,62	31,80
7/16	10,69	11,11	16,31	16,66	10,92	11,13	1,19	9,53	5,41	35,10
1/2	12,24	13,08	18,67	19,05	12,50	12,70	1,40	9,53	6,22	38,10
9/16	14,07	14,29	21,01	21,41	14,07	14,27	1,57	11,10	7,01	38,10
5/8	15,37	16,31	23,39	23,83	15,65	15,88	1,78	12,70	7,80	44,50
3/4	18,52	19,51	28,12	28,58	18,80	19,05	2,16	15,88	9,40	50,80
7/8	21,64	22,73	32,84	33,32	21,95	22,23	2,54	19,05	10,97	57,20
1	24,79	25,96	37,57	38,10	25,10	25,40	2,90	19,05	12,57	63,50
1 1/8	27,89	29,18	42,29	42,88	28,22	28,58	3,28	22,23	14,15	71,40
1 1/4	31,06	32,44	47,04	47,63	31,39	31,75	3,66	22,23	15,75	79,20
1 3/8	34,16	35,66	51,77	52,37	34,54	34,93	4,06	25,40	17,32	87,40
1 1/2	37,34	38,89	56,49	57,15	37,72	38,10	4,47	25,40	18,92	95,30
1 3/4	43,59	45,34	65,96	66,68	44,04	44,45	5,26	31,75	22,10	111,30
2	49,89	51,79	75,44	76,20	50,37	50,80	6,05	38,10	25,27	127,00
2 1/4	56,24	58,55	84,94	85,73	56,69	57,15	6,83	44,45	28,45	142,70
2 1/2	62,51	65,00	94,41	95,25	63,02	63,50	7,62	44,45	31,62	158,80
2 3/4	68,86	71,81	103,89	104,78	69,34	69,85	8,43	50,80	34,80	174,80
3	75,21	78,26	113,39	114,30	75,67	76,20	9,22	57,15	37,97	190,50

DIMENSIONS OF SOCKET HEAD CAP SCREWS DIN 912
Nominal Size	D		A		H		J		T	LT
	Body		Head		Head		Hex Socket		Key	Thread
	Diameter		Diameter		Height		Size		Engagement	Length
	min	max	min	max	min	max	min	max	min
M 6	5,82	6,00	9,78	10,00	5,70	6,00	5,02	5,14	3,00	30
M 8	7,78	8,00	12,73	13,00	7,64	8,00	6,02	6,14	4,00	35
M 10	9,78	10,00	15,73	16,00	9,64	10,00	8,03	8,18	5,00	40
M 12	11,73	12,00	17,73	18,00	11,57	12,00	10,03	10,18	6,00	50
M 14	13,73	14,00	20,67	21,00	13,57	14,00	12,03	12,21	7,00	55
M 16	15,73	16,00	23,67	24,00	15,57	16,00	14,03	14,21	8,00	60
M 18	17,73	18,00	26,67	27,00	17,57	18,00	14,03	14,21	9,00	65
M 20	19,67	20,00	29,67	30,00	19,48	20,00	17,05	17,23	10,00	70
M 22	21,67	22,00	32,61	33,00	21,48	22,00	17,05	17,23	11,00	70
M 24	23,67	24,00	35,61	36,00	23,48	24,00	19,07	19,28	12,00	80
M 27	26,67	27,00	39,61	40,00	26,48	27,00	19,07	19,28	13,50	90
M 30	29,67	30,00	44,61	45,00	29,48	30,00	22,07	22,28	15,50	100
M 33	32,61	33,00	49,61	50,00	32,38	33,00	24,07	24,28	18,00	100
M 36	35,61	36,00	53,54	54,00	35,38	36,00	27,07	27,28	19,00	110
M 39	38,61	39,00	57,54	58,00	38,38	39,00	27,07	27,28	21,00	120
M 42	41,61	42,00	62,54	63,00	41,38	42,00	32,08	32,33	24,00	130
M 45	44,61	45,00	66,54	67,00	44,38	45,00	32,08	32,33	26,00	140
M 48	47,61	48,00	71,54	72,00	47,38	48,00	36,08	36,33	28,00	150
M 52	51,54	52,00	77,48	78,00	51,26	52,00	36,08	36,33	31,00	150

Dimensions in mm

DIMENSIONS OF HEX BOLTS in mm - ANSI/ASME 18.2.1 - TABLE 2
Nominal Size	E		F		G		H		LT		Y
	Body		Width		Width		Height		Thread Lenght
	Diameter		Across Flats		Across Corners				up to 6”	over 6”
	min	max	min	max	min	max	min	max	basic	basic	max
1/4	6,00	6,60	10,80	11,10	12,80	12,30	3,80	4,80	19,00	25,40	-
5/16	7,60	8,20	12,30	12,70	14,70	14,00	5,00	6,00	22,20	28,60	-
3/8	9,10	9,90	13,80	14,30	16,50	15,70	5,70	6,80	25,40	31,80	-
7/16	10,70	11,50	15,30	15,90	18,30	17,40	6,90	8,00	28,60	64,90	-
DIMENSIONS OF HEAVY HEX BOLTS - ANSI/ASME 18.2.1 - TABLE 3
3/8	9,10	9,80	17,00	17,50	19,40	20,20	5,70	6,80	25,40	31,80	7,90
1/2	12,24	13,08	21,60	22,20	24,60	25,70	7,70	9,20	31,80	38,10	9,80
5/8	15,37	16,31	26,20	27,00	29,80	31,20	9,30	11,30	38,10	44,50	11,60
3/4	18,52	19,51	30,80	31,80	35,10	36,70	11,60	13,30	44,50	50,80	12,70
7/8	21,64	22,73	35,40	36,50	40,40	42,20	13,50	15,30	50,80	57,20	14,10
1	24,79	25,96	40,00	41,30	45,60	47,70	15,00	17,80	57,20	63,50	15,90
1 1/8	27,89	29,18	44,60	46,00	50,90	53,20	16,70	19,80	63,50	69,90	18,10
1 1/4	31,06	32,44	49,20	50,80	59,10	58,60	19,00	22,30	69,90	76,20	18,10
1 3/8	34,16	35,66	53,80	55,60	61,40	64,20	20,60	23,90	76,20	82,60	21,20
1 1/2	37,34	38,89	58,40	60,30	66,60	69,60	22,90	26,30	82,60	88,90	21,20
1 3/4	43,59	45,34	67,60	69,90	77,10	80,40	26,80	30,40	95,30	101,60	25,40
2	49,89	51,79	76,80	79,40	87,60	91,60	29,80	35,30	108,00	114,30	28,20
2 1/4	56,24	58,55	86,10	88,90	98,10	102,60	33,70	39,30	120,70	127,00	28,20
2 1/2	62,51	65,00	95,30	98,40	108,30	113,60	37,60	43,40	133,40	139,70	31,80
2 3/4	68,86	71,81	104,40	108,00	119,10	124,60	41,50	47,50	146,10	152,40	31,80
3	75,21	78,26	113,70	117,50	129,60	135,60	46,10	52,50	158,80	165,10	31,80

DIMENSIONS OF HEXAGONAL BOLTS - DIN 931 - DIN 933
Nominal Size	E		F		G	H		LT
	Body		Width		Width	Height		Thread Length
	Diameter		Across Flats		Across Corners			up to 120	op to 200	over 200
	min	max	min	max	min	min	max
M 6	5,82	6,00	9,78	10,00	11,05	3,85	4,00	18	24
M 8	7,78	8,00	12,57	13,00	14,38	5,06	5,54	22	28
M 10	9,78	10,00	16,57	17,00	18,90	6,11	6,69	26	32	45
M 12	11,73	12,00	18,48	19,00	21,10	7,21	7,79	30	36	49
M 14	13,73	14,00	21,16	22,00	24,49	8,51	9,09	34	40	53
M 16	15,73	16,00	23,16	24,00	26,75	9,71	10,29	38	44	57
M 18	17,73	18,00	26,16	27,00	30,14	11,15	11,85	42	48	61
M 20	19,67	20,00	29,16	30,00	33,53	12,15	12,85	46	52	65
M 22	21,67	22,00	31,00	32,00	35,72	13,65	14,35	50	56	69
M 24	23,67	24,00	35,00	36,00	39,98	14,65	15,35	54	60	73
M 27	26,48	27,00	40,00	41,00	45,20	16,65	17,35	60	66	79
M 30	29,48	30,00	45,00	46,00	50,85	18,28	19,12	66	72	85
M 33	32,38	33,00	49,00	50,00	55,37	20,58	21,42	72	78	91
M 36	35,38	36,00	53,80	55,00	60,79	22,80	22,92	78	84	97
M 39	38,38	39,00	58,80	60,00	66,44	24,58	25,42	84	90	103
M 42	41,38	42,00	63,10	65,00	71,30	25,58	26,42	90	96	109
M 45	44,38	45,00	66,10	70,00	76,95	27,58	28,42	96	102	115
M 48	47,38	48,00	73,10	75,00	82,60	29,58	30,42	102	108	121
M 52	51,26	52,00	78,10	80,00	88,25	32,50	33,50		116	129