DIN 792 Cylindrical Countersunk Screw / Cylindrical Nib Bolts

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DIN 792 Cylindrical Countersunk Screw / Cylindrical Nib Bolts

Name: DIN 792 Cylindrical Countersunk Screw / Cylindrical Nib Bolts
Brand: JIGNESH STEEL
Price: 400.0 INR
Availability: InStock

Price 400.0 INR/ Piece

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MOQ : 40 Pieces

DIN 792 Cylindrical Countersunk Screw / Cylindrical Nib Bolts Specification

Tensile Strength
800-1200 MPa, depending on grade

Finish
Polished, Smooth, Matte, Rugged (Depending on treatment)

Capacity
As per DIN 792 specification, varies with size

Corrosion Resistant
Yes, with appropriate surface treatment (e.g. SS, zinc, nickel)

Hardness
Up to 39-44 HRC depending on grade

Diameter
M4 to M24 (custom sizes available)

Head Type
Cylindrical Countersunk

Feature
High strength, precision engineering, corrosion resistance, customizable length and diameter

Thickness
Standard DIN 792 head and body thickness

Drive Type
Socket / Allen drive, plain head available

Grade
8.8, 10.9, 12.9 (other grades available upon request)

Surface Treatment
Plain, Zinc Plated, Black Oxide, Hot Dip Galvanized, Nickel Plated

Standard
DIN 792

Torque
As per DIN recommendation for diameter and grade

Thread Type
Metric Coarse & Fine Thread (as per DIN)

Shape
Cylindrical with countersunk head and nib

Load Capacity
Depends on diameter, material, and grade

Fasteners Type
Cylindrical Nib Bolt / Screw

Material
Carbon Steel, Alloy Steel, Stainless Steel (A2, A4), Brass, Bronze

Tolerance
0.1 mm

Application
Machinery, automotive, structural connections, heavy-duty fixtures, tooling

Length
10 mm to 200 mm or as per requirement

Industry Compliances
RoHS, ISO, REACH compliant

Temperature Range
-50C to +300C (depending on material)

Packaging
Bulk, small boxes, custom packaging available

Thread Length
Partial or full thread (customizable)

Usage Environment
Indoor, Outdoor, High Humidity, Marine (as per finish/material)

Color
Natural, black, gold, silver, as per plating/finish

Lead Time
Ready stock for standard sizes, 2-4 weeks for customized orders

Certificates
Test Certificate, Material Traceability, Mill Certificate on request

Customization
Head marking, size, threading (as per drawing/specification)

About DIN 792 Cylindrical Countersunk Screw / Cylindrical Nib Bolts

Cylindrical nib bolts are specialized heavy-duty industrial fasteners featuring a smooth cylindrical head with a protruding locking nib or key underneath. This unique geometry locks the bolt into a matching slot or recessed groove in the application surface, preventing the bolt from rotating during installation or high-vibration operations. They are widely utilized in heavy machinery, mining equipment, automotive assemblies, and structural steel connections where single-sided tightening is necessary.

Material grades

High-temperature stainless steel

Grade 310/310S: Contains high chromium and nickel content. Excellent oxidation resistance up to 1035C.

Grade 321/347: Stabilized with titanium or niobium. Prevents carbide precipitation during high-temperature welding applications.

High tensile carbon and alloy steel

Grade 8.8: Medium carbon steel, quenched and tempered. Offers standard structural strength up to 800 MPa.

Grade 10.9: Alloy steel, quenched and tempered. Provides high structural strength up to 1040 MPa.

Grade 12.9: High-performance alloy steel. Offers maximum tensile strength up to 1220 MPa for heavy machinery.

Hastelloy

Grade C276: Exceptional resistance to strong reducing and oxidizing acids. Prevents pitting and stress corrosion cracking.
Grade B3: Specially formulated for superior resistance to hydrochloric acid at all concentrations and temperatures.

Inconel

Grade 625: High strength and excellent fabricability. Resists severe pitting and crevice corrosion in marine environments.

Grade 718: Precipitation-hardened nickel-chromium alloy. Combines high yield strength with creep-rupture properties up to 700C.

Monel

Grade 400: Solid-solution binary alloy of copper and nickel. Highly resistant to rapidly flowing seawater and hydrofluoric acid.

Grade K500: Combines the corrosion resistance of Grade 400 with added strength and hardness via aluminium and titanium additions.

Surface finishes

Hot-dip galvanized: Thick zinc layer applied via molten bath immersion. Offers long-term sacrificial outdoor atmospheric corrosion protection.

Zinc plating: Thin electrochemically deposited zinc layer. Provides mild corrosion resistance with a bright, aesthetically clean finish.

Polishing: Mechanical smoothing of the base metal. Minimizes surface crevices, enhances aesthetic shine, and improves stainless steel passive film.

Black phosphating: Chemical conversion coating that absorbs anti-corrosion oils. Provides anti-galling properties, low light reflectivity, and light moisture protection.

Versatile Materials and Application Range

The DIN 792 cylindrical countersunk screws are engineered using materials like carbon steel, alloy steel, stainless steel (A2, A4), brass, or bronze, ensuring durability and adaptability. Their corrosion-resistant properties, selection of finishes, and compatibility with both indoor and outdoor-including high humidity and marine-environments make them ideal for machinery, automotive, structural, and heavy-duty applications.

Precision and Customization for Every Project

Customers have the flexibility to specify bolt length, diameter, threading, and head marking, including options for surface treatments such as zinc, nickel, or hot-dip galvanizing. Products comply with industry regulations (RoHS, ISO, REACH) and can be supplied with certificates upon request. Fasteners are available in standard and bespoke dimensions to meet unique requirements.

Reliable Stock and Certified Supply

DIN 792 fasteners are available in ready stock for common sizes, with custom specifications fulfilled within 2-4 weeks. Bulk and specialized packaging options cater to various project needs. Certificates (Test, Material Traceability, Mill) are provided on request, ensuring transparency and product integrity. All fasteners are manufactured to DIN 792 standards, guaranteeing high performance and reliability.

FAQ's of DIN 792 Cylindrical Countersunk Screw / Cylindrical Nib Bolts:

Q: How do I select the proper material and finish for my DIN 792 cylindrical countersunk screw?

A: Choose the material based on your environment and application. Stainless steel (A2, A4) or brass is ideal for marine or humid conditions due to their corrosion resistance. For high-strength applications, alloy or carbon steel in appropriate grades (8.8, 10.9, 12.9) is recommended. Surface treatments like zinc, nickel, or black oxide enhance corrosion resistance and match aesthetic preferences.

Q: What customization options are available for DIN 792 cylindrical nib bolts?

A: You can customize length (10mm-200mm), diameter (M4-M24 or as specified), thread type (coarse/fine), head marking, finish (natural, black, gold, silver), and packaging. Drive type (socket/Allen, plain head), and surface treatments are also customizable per your project requirements or drawings.

Q: When should test, mill, or material traceability certificates be requested?

A: It is best to request certificates during the order placement if your project requires documented product origin, material composition, or compliance information. Certificates can be provided for quality assurance, regulatory compliance, or project documentation purposes.

Q: Where can these cylindrical countersunk screws be used?

A: These fasteners are suitable for a wide range of applications, including machinery, automotives, heavy-duty fixtures, structural connections, and tooling. Their corrosion resistance and customizable features enable use in indoor, outdoor, marine, and humid environments.

Q: What is the usual lead time for standard and customized DIN 792 screws?

A: Standard sizes are available from ready stock and can be shipped promptly. Customized orders, such as special dimensions or finishes, typically require a lead time of 2-4 weeks based on the complexity and volume of the order.

Q: How can I ensure the DIN 792 screw is suitable for my load and torque requirements?

A: Refer to DIN 792 recommendations for torque, diameter, and material grade to match your application's load demands. Tensile strength ranges from 800-1200 MPa, varying with grade and material; consult the specification sheet or contact the manufacturer for guidance on capacity and use.

Q: What are the main benefits of choosing DIN 792 cylindrical countersunk screws?

A: These fasteners provide high strength, tight tolerances, corrosion resistance with suitable finishes, and the option for precise customization. Their adherence to strict industry standards ensures reliability and safety in critical applications.

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