DIN 933 Grade A2-70 Bolts Dimension

DIN 933 Grade A2-70

DIN 933 Grades

DIN 933 Grade A2-70

DIN 933 A2-70 Hexagon Head Bolts—High-Strength Stainless Steel Fasteners

The DIN 933 A2-70 hexagon head bolt is a high-performance stainless steel fastener designed for durability, corrosion resistance, and mechanical strength. Manufactured from A2-70 stainless steel, these bolts are widely used in construction, automotive, marine, and industrial applications.

At Bigboltnut, we provide premium-quality A2-70 hex bolts that are standardised to meet DIN 933 specifications.

A2-70 Bolt Specification and Properties

The A2-70 bolt specification calls for fasteners made of A2 austenitic stainless steel, usually 304-grade, that can withstand a minimum of 700 MPa of tension. This rating gives A2-70 bolts excellent mechanical qualities and corrosion resistance for high-stress and outdoor applications.

Key Features of A2-70 Bolts

Material: Stainless steel A2 (304-grade)
Strength Class: 70 (Minimum tensile strength of 700 MPa)
Corrosion Resistance: Excellent resistance to rust and oxidation
Application: Used in construction, automotive, marine, and industrial machinery
Head Type: Hexagon head, suitable for high-torque applications

These bolts provide a secure and durable fastening solution, ensuring long-lasting performance even in harsh environments.

A2-70 Bolt Dimensions and Sizes

A2-70 hex bolts are available in various sizes and dimensions to accommodate different fastening requirements. Below are standard A2-70 bolt dimensions in both millimetres and inches.

A2-70 Bolt Size in MM

Bolt Size (Metric)	Diameter (mm)	Length (mm)	Thread Pitch (mm)
M16	6	10-100	1.0
M8	8	12-150	1.25
M10	10	16-200	1.5
M12	12	20-250	1.75
M16	16	25-300	2.0

A2-70 Bolt Size in Inches

Bolt Size (Inches)	Diameter (in)	Length (in)	Thread Count
1/4"	0.25"	0.5" - 4"	20 TPI
5/16"	0.3125"	0.75" - 5"	18 TPI
3/8"	0.375"	1" - 6"	16 TPI
1/2"	0.5"	1.5" - 8"	13 TPI
5/8"	0.625"	2" - 10"	11 TPI

A2-70 Hexagon Head Bolts and Screws

The fully threaded A270 hexagon head bolt (A2-70 hex bolt) is designed for high-torque applications. Structures, machine fastening, and building projects benefit from its six-sided head's solid grasp.

The A270 hexagon head screw is similar but used differently. Hex head screws thread directly into tapped holes, making them suitable for self-securing connections. Bolts require a nut.

Key Advantages of A2-70 Hex Bolts & Screws

High mechanical strength
Corrosion-resistant
Precision threading
Versatile applications

Both hex bolts and screws offer unmatched reliability in critical engineering applications.

Applications of A2-70 Hex Bolts

A2-70 hex bolts are widely used in industries that require strong, corrosion-resistant fasteners. Common applications include:

Structural Engineering & Construction—Ideal for steel frameworks, bridges, and large assemblies
Automotive & Machinery—Used in engine components, heavy equipment, and mechanical structures
Marine & Offshore—Resistant to saltwater and humid environments
Chemical & Food Processing Plants—Ensures safe and contamination-free fastening
General Industrial Applications—Suitable for repair, maintenance, and fabrication projects

Their superior strength and resistance to environmental factors make them a preferred choice for high-performance fastening.

Why Choose Bigboltnut for A2-70 Bolts?

At Bigboltnut, we are dedicated to providing top-quality stainless steel fasteners that meet industry-leading standards. Our A2-70 bolts are:

Crafted from high-quality stainless steel for lasting strength.
Engineered with precision to meet DIN 933 specifications, ensuring an ideal fit and exceptional strength.
Offered in various sizes, including tailored options
Engineered for exceptional mechanical and corrosion resistance, guaranteeing outstanding reliability.
Worldwide delivery, on time, every time.

We prioritize quality, precision, and performance, making us a trusted supplier of industrial fasteners.

Dimensional standard as per DIN 933

Size	Pitch (p)	Width across corner (e)	Width across Flat (s)		Head Thickness (k)		Thread Length b	Transition Diameter da	Dia. of washer face dw	Radius under head r	Depth of washer face c		Major Diameter (D)		Pitch Diameter (D1)		Minor Diameter (D2)
	MM	*Min.*	*Min.*	*Max.*	*Min.*	*Max.*	-	*Max.*	*Min.*	*Min.*	*Min.*	*Max.*	*Min.*	*Min.*	*Min.*	*Max.*	*Min.*
M-16	2.0	26.17	23.16	24	9.71	10.29	FT	17.70	22.00	0.6	0.2	0.8	15.68	15.96	14.50	14.60	13.80
M-18	2.5	29.56	26.16	27	11.15	11.85	FT	20.20	24.85	0.6	0.2	0.8	17.62	17.96	16.15	16.25	15.25
M-20	2.5	32.95	29.16	30	12.15	12.85	FT	22.40	27.70	0.8	0.2	0.8	19.62	19.96	18.15	18.25	17.25
M-22	2.5	37.29	33.00	34	13.65	14.35	FT	24.40	31.35	0.8	0.2	0.8	21.62	21.96	20.15	20.25	19.25
M-24	3.0	39.55	35.00	36	14.65	15.35	FT	26.40	33.25	0.8	0.2	0.8	23.58	23.95	21.80	21.90	20.70
M-27	3.0	45.20	40.00	41	16.65	17.35	FT	30.40	38.00	1.0	0.2	0.8	26.58	26.95	24.80	24.90	23.70
M30	3.5	50.85	45.00	46	18.28	19.12	FT	33.40	42.75	1.0	0.2	0.8	29.52	29.95	27.50	27.60	26.16
M-33	3.5	55.37	49.00	50	20.58	21.42	FT	36.40	46.55	1.0	0.2	0.8	32.52	32.95	30.50	30.60	29.16
M-36	4.0	60.79	53.80	55	22.08	22.92	FT	39.40	51.11	1.0	0.2	0.8	35.46	35.94	33.15	33.25	31.61
M-39	4.0	66.44	58.80	60	24.58	25.42	FT	42.40	55.86	1.0	0.3	1.0	38.46	38.94	36.20	36.30	34.61
M-42	4.5	71.30	63.10	65	25.58	26.42	FT	45.60	59.95	1.2	0.3	1.0	41.44	41.94	38.80	38.90	37.07
M-45	4.5	76.95	68.10	70	27.58	28.42	FT	48.60	64.70	1.2	0.3	1.0	44.44	44.94	41.80	41.90	40.07
M-48	5.0	82.60	73.10	75	29.58	30.42	FT	52.60	69.45	1.6	0.3	1.0	47.40	47.93	44.50	44.60	42.52
M-52	5.0	88.25	78.10	80	32.50	33.50	FT	56.60	74.20	1.6	0.3	1.0	51.40	51.93	48.50	48.60	46.52
M-56	5.5	93.56	82.80	85	34.50	35.50	FT	63.00	78.66	2.0	0.3	1.0	55.36	55.92	52.10	52.20	49.97
M-60	5.5	99.21	87.80	90	37.50	38.50	FT	67.00	83.41	2.0	0.3	1.0	59.36	59.92	57.85	57.95	53.97
M-64	6.0	104.86	92.80	95	39.50	40.50	FT	71.00	88.16	2.0	0.3	1.0	63.32	63.92	59.80	59.90	57.42

Order Your A2-70 Hex Bolts from Bigboltnut Today!

Need high-strength A2-70 hexagon head bolts for your project? Bigboltnut offers top-quality fasteners, ensuring superior performance in demanding environments.