Threaded Studs, Bars & Rod DIN 976-2 Manufacturer & Exporters in India
DIN 976-1, DIN 976-2, DIN 975 & ASTM A193 B7/B8 Stud Bolts
BRK Industries is an ISO 9001:2015 and CE Certified premier manufacturer and global exporter of industrial-grade DIN 976-2 Threaded Studs, DIN 976-1 Threaded Rods, and DIN 975 All-Thread Bars. Manufactured in high tensile steel classes 4.6, 8.8, 10.9, 12.9, petrochemical alloy steel ASTM A193 B7/B16, and marine-grade stainless steel A2 (304) and A4 (316). We supply full traceability with EN 10204 Type 3.1 Mill Test Certificates.
What is a DIN 976-2 Threaded Stud Bolt?
A DIN 976-2 stud bolt is a standardized headless threaded fastener engineered with metric threads on both ends separated by an unthreaded cylindrical center shank. Unlike continuous all-thread rods (DIN 975 / DIN 976-1), the short "tap end" of a DIN 976-2 stud is screwed permanently into a tapped blind hole of a metal casting or machine housing, while the projecting longer end receives a hex nut to secure heavy mating assemblies under high mechanical stress.
Short end permanently engages cast iron (1.25d), steel (1d), or aluminum/light alloys (2d) without thread stripping.
The unthreaded center shank intersects the joint shear interface, providing up to 30% higher shear strength over all-thread rods.
Standard DIN 976-2 accommodates metric fine thread profiles to resist back-out under severe cyclic machine vibration.
Types of Threaded Studs & Bars (DIN 976 / DIN 975)
BRK manufactures three distinct structural types of threaded studs categorized by thread coverage, shank geometry, and end engagement specifications.
Most Popular
DIN 976-1 Fully Threaded Stud Bolts (Continuous All-Thread)
Continuous thread coverage from end to end without any unthreaded shank. Cut to exact project lengths with precision chamfered ends.
- ✓ Used extensively for pipeline flange bolting (ASME B16.5)
- ✓ Standard lengths: 1m, 2m, 3m, 10ft & 12ft bars
- ✓ Grade 4.6, 8.8, 10.9, 12.9, B7, B8, B8M
DIN 976-2 Specialty
DIN 976-2 / DIN 938/939Tap-End Stud Bolts (DIN 976-2 German Standard)
Headless bolts engineered with threads at both extreme ends and an unthreaded center shank. The shorter tap end permanently screws into blind holes.
- ✓ Tap end engagement: 1d (steel), 1.25d (cast iron), 2d (aluminum)
- ✓ Chamfered lead-in for smooth machine assembly
- ✓ Metric fine & coarse pitch combinations
Heavy Structural
DIN 976-2 Type CDouble-End Clamping Stud Bolts
Engineered with equal thread length at both ends separated by an unthreaded center body. Both ends receive standard hex nuts.
- ✓ Equal thread engagement on both sides (b1 = b2)
- ✓ Solid shank provides superior shear resistance
- ✓ High fatigue life under dynamic structural loads
Technical Specifications & Standard Data
Accurate dimensions, thread pitches, tensile limits, and surface thicknesses according to ISO 898-1, DIN 976, and ASTM A193.
| Size | Pitch (mm) | Series | Core Ø (mm) | Stress Area (mm²) | Weight (kg/m) | Proof 8.8 (kN) | Proof 10.9 (kN) |
|---|---|---|---|---|---|---|---|
| M6 | 1.00 | Coarse | 4.77 | 20.1 | 0.177 | 11.6 | 16.7 |
| M8 | 1.25 | Coarse | 6.47 | 36.6 | 0.319 | 21.2 | 30.4 |
| M10 | 1.50 | Coarse | 8.16 | 58.0 | 0.500 | 33.7 | 48.1 |
| M12 | 1.75 | Coarse | 9.85 | 84.3 | 0.725 | 48.9 | 70.0 |
| M14 | 2.00 | Coarse | 11.55 | 115.0 | 0.988 | 66.7 | 95.5 |
| M16 | 2.00 | Coarse | 13.55 | 157.0 | 1.330 | 91.0 | 130.0 |
| M18 | 2.50 | Coarse | 14.93 | 192.0 | 1.650 | 115.0 | 165.0 |
| M20 | 2.50 | Coarse | 16.93 | 245.0 | 2.070 | 147.0 | 203.0 |
| M22 | 2.50 | Coarse | 18.93 | 303.0 | 2.580 | 182.0 | 251.0 |
| M24 | 3.00 | Coarse | 20.32 | 353.0 | 2.980 | 212.0 | 293.0 |
| M27 | 3.00 | Coarse | 23.32 | 459.0 | 3.850 | 275.0 | 381.0 |
| M30 | 3.50 | Coarse | 25.71 | 561.0 | 4.750 | 337.0 | 466.0 |
| M36 | 4.00 | Coarse | 31.09 | 817.0 | 6.900 | 490.0 | 678.0 |
| M42 | 4.50 | Coarse | 36.48 | 1120.0 | 9.900 | 672.0 | 930.0 |
| M48 | 5.00 | Coarse | 41.87 | 1470.0 | 13.500 | 882.0 | 1220.0 |
| M56 | 5.50 | Coarse | 49.25 | 2030.0 | 18.500 | 1218.0 | 1685.0 |
| M64 | 6.00 | Coarse | 56.64 | 2680.0 | 24.500 | 1608.0 | 2224.0 |
| Property Class / Grade | Standard | Tensile (Rm) | Yield (Re) | Elongation (%) | Hardness | Primary Application |
|---|---|---|---|---|---|---|
| Class 4.6 / 4.8 | ISO 898-1 | 400 MPa | 240 - 320 MPa | ≥ 22% | 67 - 95 HRB | HVAC duct suspension, light plumbing and cable trays. |
| Class 8.8 (High Tensile) | ISO 898-1 | 800 - 830 MPa | 640 - 660 MPa | ≥ 12% | 22 - 32 HRC | Heavy structural framing, tower cranes, anchor bolts. |
| Class 10.9 (Extra High) | ISO 898-1 | 1000 - 1040 MPa | 900 - 940 MPa | ≥ 9% | 32 - 39 HRC | Automotive chassis, high-vibration machinery joints. |
| Class 12.9 (Extreme Tensile) | ISO 898-1 | 1200 - 1220 MPa | 1080 - 1100 MPa | ≥ 8% | 39 - 44 HRC | Heavy hydraulic presses, injection molds, turbine casings. |
| ASTM A193 B7 | ASTM A193 | 860 MPa (125 ksi) | 720 MPa (105 ksi) | ≥ 16% | ≤ 35 HRC | Petrochemical refineries, boiler flanges, steam valves (up to 450°C). |
| Stainless Steel A2-70 (304) | ISO 3506-1 | 700 MPa | 450 MPa | ≥ 40% | ≤ 200 HB | Food processing equipment, architectural curtain walls. |
| Stainless Steel A4-80 (316) | ISO 3506-1 | 800 MPa | 600 MPa | ≥ 30% | ≤ 220 HB | Marine rigs, coastal desalination plants, chemical reactors. |
| Surface Coating | Standard Reference | Layer Thickness | Salt Spray (ASTM B117) | Appearance | Primary Industrial Use |
|---|---|---|---|---|---|
| Hot Dip Galvanized (HDG) | ISO 10684 / ASTM A153 | 45 - 65 μm | 1000+ Hours | Matte Dull Silver Grey | Bridges, solar post anchoring, outdoor utility transmission. |
| Electro Zinc Plated (Cr3+) | ISO 4042 / ASTM B633 | 8 - 15 μm | 96 - 240 Hours | Clear Blue or Yellow | Indoor electrical trays, drywall bracing, ceiling HVAC ducting. |
| Dacromet 320 / Geomet 321 | ISO 10683 / ASTM F1136 | 5 - 10 μm | 1000 - 1500 Hours | Smooth Metallic Silver | Zero hydrogen embrittlement for Grade 10.9 & 12.9 high tensile studs. |
| PTFE / Xylan Fluoropolymer | Whitford Spec | 20 - 35 μm | 2000+ Hours | Engineered Blue/Green | Subsea pipelines, offshore rigs, severe acidic refineries. |
Quality Assurance, Testing & Export Packaging
Every threaded stud and rod produced by BRK Industries in Ludhiana adheres to strict zero-defect quality benchmarks, backed by Third-Party Inspection and certified export-grade seaworthy logistics.
✓ 6-Stage Quality Control Protocol (EN 10204 3.1 Certified)
1. Raw Material Spectrometry (PMI)
100% optical emission spectrometer verification of raw steel coils before heading/threading to ensure exact chemical alloy percentages (C, Mn, Cr, Mo, Ni).
2. Thread Pitch & Gauge Inspection
Precision Go/No-Go calibrated thread ring gauges (Class 6g / 2A) checked every 30 minutes during high-speed cold thread rolling.
3. Universal Tensile & Proof Load Test
Calibrated hydraulic computerized UTM tensile test machines to verify actual yield strength, breaking load, and elongation percentage.
4. Microstructure & Core Hardness
Rockwell & Brinell hardness testing (HRC / HRB) verifying heat-treatment martensitic transformation and uniform quench-and-temper hardening.
5. Neutral Salt Spray (ASTM B117)
Accelerated chamber testing ensuring hot-dip galvanized and Dacromet coated threaded rods survive 1000+ hours without red rust initiation.
6. EN 10204 Type 3.1 MTC Issuance
Formal signed and stamped Mill Test Certificate dispatched with every shipping container linking test heats directly to pallet batch numbers.
Seaworthy, Corrosion-Proof Container Packaging
Long-distance ocean transit demands rigorous protection against salt-air humidity, handling vibration, and surface thread nicking.
Serving EPC Contractors & Stockists in 45+ Nations
Shipments are containerized and dispatched directly from inland container depots (ICD Ludhiana) connecting to Mundra Port and JNPT Nhava Sheva.
United States (USA), Canada, Mexico
United Kingdom, Germany, France, Netherlands, Italy
United Arab Emirates, Saudi Arabia, Qatar, Kuwait, Oman
Australia, Singapore, Malaysia, Vietnam
Frequently Asked Technical Questions
Direct answers formatted for Google Rich Snippets & AI Overviews.
What is the difference between DIN 976-1, DIN 976-2, and DIN 975? ↓
DIN 975 was the historical German standard for 1-meter and 2-meter continuous all-thread rods. The Deutsches Institut für Normung officially superseded DIN 975 by introducing DIN 976, divided into two distinct sections: DIN 976-1 covers metric coarse pitch full-thread rods (cut to custom lengths or standard 1m/2m/3m bars) with chamfered or sheared ends; while DIN 976-2 specifically defines metric fine pitch threads and studs with specific tap-end thread lengths (e1) intended for permanent tapping into engine or machine blocks.
What are the three main types of threaded studs manufactured by BRK? ↓
BRK Industries manufactures three main configurations: 1) Fully Threaded Stud Bolts (Continuous thread end-to-end, commonly paired with two heavy hex nuts for ASME B16.5 pipe flanges); 2) Tap-End Stud Bolts (DIN 976-2, having unequal thread lengths separated by an unthreaded center shank, where the short threaded tap-end screws permanently into a tapped machine casting); and 3) Double-End Stud Bolts (Featuring equal thread lengths at both ends with a plain central shank for dual-nut clamping).
What material property classes are available for DIN 976-2 threaded studs? ↓
BRK Industries manufactures DIN 976-2 studs in: 1) Graded High Tensile Carbon & Alloy Steel: Class 4.6, 8.8, 10.9, and 12.9; 2) Petrochemical & High Temperature: ASTM A193 Grade B7, B7M, B16; 3) Stainless Steel: Austenitic A2-70 (AISI 304), A4-70/A4-80 (AISI 316), and ASTM A193 B8/B8M; 4) Structural Foundations: ASTM A307 & ASTM A615.
How do I choose between ASTM A193 Grade B7 and DIN 976 Grade 8.8? ↓
Both Grade 8.8 and ASTM A193 B7 are heat-treated alloy steels with comparable tensile strengths (~800-860 MPa). However, ASTM A193 Grade B7 is specifically formulated with Chromium and Molybdenum (AISI 4140/4142) and tested for high temperature and pressure containment in refineries, power generation, and ASME boiler codes. DIN 976 Grade 8.8 is predominantly chosen for European civil engineering, heavy machinery, structural construction, and general mechanical fastening.
Does BRK Industries provide CE Marking and EN 10204 3.1 Test Certificates? ↓
Yes. All BRK structural fasteners are CE marked under EN 15048 and EN 14399. Every order is traceable with an official EN 10204 Type 3.1 Mill Test Certificate documenting verified chemical spectrometer composition (C, Mn, Si, P, S, Cr, Mo, Ni), tensile yield strength, elongation percentage, core hardness, and coating salt spray results.
Which countries does BRK Industries export threaded studs and rods to? ↓
BRK Industries actively exports threaded rods, studs, and fasteners to the USA, Canada, United Kingdom, Germany, France, Italy, Poland, Spain, the UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Singapore, Malaysia, and Australia through containerized dispatch at Mundra Port and Nhava Sheva (JNPT).