Where are blind bolts used in real-world projects?

Blind bolts are applied when the rear part of a structure is inaccessible, e.g., within hollow beams or enclosed compartments. They find usage in steel buildings, tunnels, elevator rails, and frames where bolts or welding cannot be achieved. One-sided application facilitates fast and secure assembly. Blind bolts are capable of sustaining heavy loads and resisting loosening due to vibration. Installation is easy and effective, particularly overhead or in enclosed spaces.

How do blind bolts differ from traditional bolts?

Blind bolts are mounted from a single side, while common bolts require an opposite-end nut or tool. After being driven through the hole, they seal internally to retain their position. This feature suits applications in box sections and limited access areas. They are simpler to mount in enclosed spaces and use fewer tools. The locked assembly is solid over time even with regular heavy-duty usage. These bolts are strong as well as convenient for assembly.

Are blind bolts industrial grade?

Yes, blind bolts are specifically to provide structural parts under static loads. They are designed with high tensile and shear strength to support heavy-duty assemblies. They have anchoring systems to provide safe connections even under movement stress or environmental stress. They're widely used in construction, transportation, and machine housings. Their reliability and strength prevent loosening and corrosion to maintain joint integrity. Blind bolts minimize risks of failure in systems with the need for extended service life.

Leading Blind Bolt Manufacturer In India – High Strength Blind Bolts In Alloy Steel, Carbon Steel, Stainless Steel (ss 304, Ss 316), Grade 8.8, 10.9 & 12.9

Name: Leading Blind Bolt Manufacturer In India – High Strength Blind Bolts In Alloy Steel, Carbon Steel, Stainless Steel (ss 304, Ss 316), Grade 8.8, 10.9 & 12.9
Brand: Delta Fitt Inc
Availability: InStock
Rating: 5 (16 reviews)

₹18 - ₹45

Minimum Order : 50 piece

Customization as per requirements

Specification Details
Size	20*20
Type	Bolt, Nut, Screw, Washer, Rivet, Threaded Rod, Studs, Coated, Nails, Custom Fasteners
Standard	Din, Iso, Jis, Gb, Is, Bs, Astm
Length	100mm
Material	Stainless Steel, Monel, Inconel, Incoloy, Hastelloy, Nickel, Silicon Bronze, Phosphor Bronze

Trusted Blind Bolt Manufacturer in India Supplying Carbon Steel, Alloy Steel & Stainless Steel Blind Bolts in Grades 8.8, 10.9, 12.9, SS 304 & SS 316

Delta Fitt Inc is the best Blind Bolts Manufacturer providing fastening solutions for locations where backside access is restricted during fitting. They are designed for single-side entry and ensure great holding power by using an expanding mechanism that fits tight against the structure. They are manufactured for fitting in hollow sections, structural beams, and sealed fittings, making them welding and tap-free from the other side. Blind bolts have the reputation of minimizing installation time with consistent strength in load-bearing applications within infrastructure, equipment, and fabrication systems.

Common Grades & Materials – Blind Bolts

Material / Grade	Material Type	Min. Tensile Strength	Corrosion Resistance	Typical Use
Carbon Steel (8.8 equiv.)	Medium carbon steel	~800 MPa	Low–Moderate	General structural steel
Alloy Steel (10.9 equiv.)	Heat-treated alloy steel	~1000 MPa	Low	High-load joints
Stainless Steel A2	Austenitic stainless	~700 MPa	Good	Indoor / mild corrosion
Stainless Steel A4	Mo-bearing stainless	~800 MPa	Excellent	Marine / offshore
Duplex Stainless	Duplex SS	~900 MPa	Excellent	Aggressive environments
Weathering Steel	HSLA steel	~700–800 MPa	Atmospheric	Bridges, exposed steel

Utilized in high-demand B2B engineering and construction industries, blind bolts provide consistent performance within bridges, modular enclosures, and steel structures. With high vibration and environmental stress resistance, they can be applied in dynamic assemblies. Produced in different lengths, diameters, and finishes, they are compatible with composite, aluminum, and steel structures. Their accurate anchoring system is for secure and durable connections in overhead and tight installations. We supply Anchor Bolts engineered to securely fix structural elements to concrete, ensuring strong and stable foundation connections.

Blind Bolts Weight Chart in Kg, MM, PDF

Size (Dia) \ Grip Range	0–6 mm	6–12 mm	12–18 mm	18–24 mm	24–30 mm	30–36 mm	36–42 mm	42–48 mm	48–54 mm	54–60 mm
M6	0.012	0.013	0.014	0.015	0.016	0.017	0.018	0.019	0.020	0.021
M8	0.020	0.022	0.024	0.026	0.028	0.030	0.032	0.034	0.036	0.038
M10	0.034	0.037	0.040	0.043	0.046	0.049	0.052	0.055	0.058	0.061
M12	0.055	0.060	0.065	0.070	0.075	0.080	0.085	0.090	0.095	0.100
M14	0.078	0.084	0.090	0.096	0.102	0.108	0.114	0.120	0.126	0.132
M16	0.100	0.108	0.116	0.124	0.132	0.140	0.148	0.156	0.164	0.172
M18	0.128	0.137	0.146	0.155	0.164	0.173	0.182	0.191	0.200	0.209
M20	0.160	0.172	0.184	0.196	0.208	0.220	0.232	0.244	0.256	0.268
M22	0.198	0.212	0.226	0.240	0.254	0.268	0.282	0.296	0.310	0.324
M24	0.240	0.257	0.274	0.291	0.308	0.325	0.342	0.359	0.376	0.393

Blind bolts are special mechanical bolts that are used where the only access is on one side of the joint. They find extensive applications in construction, automotive, aerospace and heavy engineering industries where conventional nuts and bolts cannot be fitted at the rear. Blind bolts are used to offer good and secure clenching in hollow sections, tubes, and closed profiles to guarantee high load bearing, vibration-free, and structural stability.

These fasteners come in different materials like stainless steel, carbon steel and alloy steel to accommodate the different environments and load conditions. Blind bolts are easily installed, less labour-intensive and have a uniform performance in comparison to the traditional fastening techniques. They offer a perfect solution to contemporary fabrication, maintenance, and retrofit projects that need reliable single-sided fastening due to their corrosion resistance, ease of use and provision of secure joints.

Chemical Composition Table (Typical Stainless Steel Blind Bolt – AISI 304)

Element	Composition (%)
Carbon (C)	≤ 0.08
Manganese (Mn)	≤ 2.00
Silicon (Si)	≤ 1.00
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.030
Chromium (Cr)	18.00 – 20.00
Nickel (Ni)	8.00 – 10.50
Iron (Fe)	Balance

Mechanical Properties Table (Typical Blind Bolt – Property Class 8.8 / Stainless Equivalent)

Property	Value
Tensile Strength	800 MPa (min)
Yield Strength	640 MPa (min)
Elongation	≥ 12%
Proof Load Stress	580 MPa
Hardness	23 – 34 HRC
Shear Strength	Approx. 0.6 × Tensile Strength

Client Project Summary of Blind Bolts Exporter in India

The client project involved the supply of high-quality Blind Bolts for use in structural and industrial applications where access was available from only one side. These blind bolts were manufactured using premium-grade alloy and stainless steel materials to ensure excellent load-bearing capacity, vibration resistance, and long service life. Each blind bolt was precision-engineered and tested in accordance with relevant ASTM and ISO standards to meet strict performance and safety requirements. Quality inspections were carried out at every stage of production, including material verification, dimensional accuracy, installation performance, and mechanical property testing. The project was completed within the committed timeframe, delivering reliable and secure fastening solutions for critical industrial assemblies.

Product Supplied	Quantity	Cities (India)
High-Strength Blind Bolts for Structural Steel Connections	225 Pieces	Ahmedabad
Heavy-Duty Blind Bolts for Industrial Frameworks	300 Pieces	Pune
Corrosion-Resistant Blind Bolts for Infrastructure Projects	260 Pieces	Chennai
Precision Blind Bolts for Equipment & Maintenance Applications	195 Pieces	Bhopal

Type of Sub-products

Stainless Steel Blind Bolts
Stainless Steel Blind Bolts
Provide excellent resistance in corrosive environments and are widely used in outdoor or marine applications.
Heavy Duty Blind Bolts
Heavy Duty Blind Bolts
Ideal for structural steel assemblies that require high load bearing capacity and vibration resistance.