Quality Assurance for Critical Fasteners & API 20E Bolting
At Industrial Engineering Works (IEW), quality is built into every stage of critical fastener manufacturing — from raw material identification and process control to final inspection, testing, marking and documentation.
As an API Spec 20E BSL-2 certified critical fastener manufacturer, we manufacture engineered bolting for demanding applications across the Oil & Gas, Wellhead, Valve, Pressure Control, Petrochemical, Energy and Industrial sectors.
Our quality management and manufacturing systems are designed to provide the material traceability, dimensional accuracy, mechanical properties and documentation required for critical bolting applications.
IEW supplies customers in India and international markets, including the United States, Middle East, Europe and Asia-Pacific.
API 20E BSL-2 Certified Critical Fastener Manufacturer
IEW is certified to API Specification 20E BSL-2 for the manufacture of critical bolting used in petroleum and natural gas industry applications.
API 20E establishes requirements for the qualification, production, testing, documentation and traceability of bolting used in critical oil and gas equipment.
Our API 20E manufacturing capabilities include critical bolting such as:
- Fully Threaded Stud Bolts
- Tap-End Studs
- Double-End Studs
- Hex Bolts
- Heavy Hex Bolts
- Heavy Hex Nuts
- Engineered and Special Fasteners
Depending on the applicable specification and customer requirement, these fasteners can be manufactured for use in equipment including wellheads, Christmas trees, valves, pressure-control equipment, drilling equipment and other critical oil & gas assemblies.
Quality Management System
IEW operates a documented quality management system based on ISO 9001:2015, supported by defined procedures for manufacturing, inspection, testing, calibration, traceability, non-conformance control and documentation.
Our quality system is focused on maintaining consistency throughout the manufacturing process while ensuring that customer drawings, purchase specifications and applicable API, ASTM, ASME, ISO and DIN requirements are properly addressed.
For critical fasteners, quality is not limited to final inspection. It begins with the raw material and continues through every manufacturing and inspection stage until final release.
Complete Material Traceability
Material traceability is one of the most important requirements in the manufacture of critical bolting.
IEW maintains identification and traceability throughout the manufacturing process, as applicable to the product specification and customer requirements.
Raw Material Heat Number → Incoming Inspection → Material Identification → Job/Batch Identification → Manufacturing → Heat Treatment → Testing & NDE → Dimensional Inspection → Product Marking → Final Documentation → Dispatch
This system enables finished fasteners to be linked back to their manufacturing and material records.
Traceability documentation may include, as applicable:
- Raw Material Mill Test Certificates
- Heat Number Identification
- Job and Batch Records
- Heat Treatment Records
- Mechanical Test Reports
- Chemical Analysis Reports
- NDE Reports
- Dimensional Inspection Reports
- Coating / Plating Reports
- Calibration Records
- Material Test Certificates / MTCs
- Certificate of Conformance
Documentation requirements are established according to the applicable specification, customer purchase order and inspection requirements.
Inspection & Testing of Critical Fasteners
IEW performs and coordinates inspection and testing throughout the manufacturing process to verify compliance with applicable specifications and customer requirements.
Dimensional Inspection
Critical dimensions are inspected using calibrated measuring and inspection equipment.
Inspection may include:
- Overall Length
- Thread Length
- Thread Dimensions
- Major Diameter
- Pitch Diameter
- Across Flats
- Across Corners
- Head Height
- Shank Diameter
- Straightness
- Chamfer Dimensions
- Go / No-Go Thread Gauging
Inspection requirements are determined according to the applicable product standard, drawing or customer specification.
Mechanical Testing
Depending on the material grade and applicable specification, mechanical testing may include:
- Tensile Strength
- Yield Strength
- Elongation
- Reduction of Area
- Hardness Testing
- Impact Testing
Testing is carried out according to the applicable ASTM/API specification and customer requirements.
Chemical Composition Verification
Material chemistry is verified against the applicable material specification.
Chemical composition verification may include review of the original mill test certificate together with additional testing or Positive Material Identification where required.
Non-Destructive Examination
Non-destructive examination may include, depending on the product and specification:
- Magnetic Particle Examination (MPI)
- Liquid Penetrant Examination (LPI)
- Ultrasonic Testing (UT)
IEW has in-house NDE capability for applicable non-API products. Where API requirements or customer specifications require appropriately qualified or accredited external examination, testing is carried out through approved external facilities.
Critical Fastener Materials & ASTM Grades
IEW manufactures critical fasteners in a wide range of alloy steel, stainless steel, nickel alloy and other engineering materials.
Common ASTM bolting grades include:
ASTM A193 High-Temperature Bolting
- ASTM A193 Grade B7
- ASTM A193 Grade B7
- ASTM A193 Grade B16
- ASTM A193 Grade B8
- ASTM A193 Grade B8M
ASTM A320 Low-Temperature Bolting
- ASTM A320 Grade L7
- ASTM A320 Grade L7M
- ASTM A320 Grade L43
High-Strength & Special Bolting
- ASTM A354 Grade BD
- ASTM A453
- ASTM A540
- 4140 / EN19
- 4340 / EN24
- Stainless Steel
- Duplex Stainless Steel
- Super Duplex Stainless Steel
- Nickel Alloys
- Inconel
Matching nuts can be manufactured or supplied in applicable grades including:
- ASTM A194 Grade 2H
- ASTM A194 Grade 2HM
- ASTM A194 Grade 7
- ASTM A194 Grade 7M
- ASTM A194 Grade 8
- ASTM A194 Grade 8M
Material selection and final requirements are always governed by the applicable specification, drawing and customer purchase order.
Standards & Specifications
IEW manufactures critical and engineered fasteners to internationally recognized specifications and customer-specific requirements.
Commonly applicable standards include:
API Specifications
- API Specification 20E
- Bolting for API equipment applications where specified
ASTM Material Specifications
- ASTM A193
- ASTM A194
- ASTM A320
- ASTM A354
- ASTM A453
- ASTM A540
Dimensional & Thread Standards
- ASME B18 Series
- ASME B1.1
- ISO Fastener Standards
- DIN Fastener Standards
Manufacturing Process Control
Critical bolting requires control throughout the complete manufacturing process rather than reliance on final inspection alone.
Depending on the product, IEW's manufacturing operations include:
- Raw Material Cutting
- Induction Heating
- Hot Forging
- CNC Turning
- Thread Rolling
- Thread Cutting
- Drilling & Tapping
- Grinding
- Chamfering
- Product Marking
- Dimensional Inspection
Special processes including heat treatment and specified surface coatings are controlled through qualified external processors where applicable.
Available surface finishes include, depending on the material and specification:
- Hot-Dip Galvanizing
- PTFE / Xylan Coating
- Zinc Plating
- Zinc Flake Coating
- Phosphating
- Black Oxide
- Other Customer-Specified Coatings
Product Identification & Marking
Correct product identification is essential for critical bolting.
Products are marked according to the applicable material specification, product specification and customer requirements.
Marking may include:
- Manufacturer Identification
- Material Grade
- Heat / Traceability Identification
- API Marking where applicable
- Customer-Specified Identification
Product identification is maintained throughout manufacturing to prevent loss of traceability between raw material and finished fasteners.
Quality Documentation
Critical fastener customers often require considerably more documentation than conventional commercial fasteners.
IEW can provide documentation packages based on the applicable specification and purchase-order requirements.
Typical documentation may include:
- Material Test Certificate
- Certificate of Conformance
- Raw Material Mill Certificate
- Chemical Test Report
- Mechanical Test Report
- Heat Treatment Report
- Hardness Test Report
- Impact Test Report
- NDE Report
- Dimensional Inspection Report
- Coating / Plating Certificate
- Traceability Records
Additional documentation can be provided where contractually specified.
Critical Fasteners for U.S. Oil & Gas Customers
IEW supports international customers requiring engineered and critical fasteners manufactured in India for supply to the United States and other global markets.
Our combination of API 20E BSL-2 certification, ISO 9001:2015 quality management, manufacturing capability and material traceability makes IEW a manufacturing source for customers requiring critical bolting rather than standard commercial fasteners.
We work with customer drawings, BOMs, ASTM specifications and project-specific requirements for both production and special fastener requirements.
Our capabilities are particularly suited to:
- Oil & Gas Equipment Manufacturers
- Valve Manufacturers
- Wellhead & Christmas Tree Manufacturers
- Pressure Control Equipment Manufacturers
- Pump Manufacturers
- Drilling Equipment Manufacturers
- EPC Companies
- Petrochemical Equipment Manufacturers
- Industrial OEMs
Customers in the United States can submit their RFQ, drawing or BOM to our engineering and commercial team for technical review and quotation.
Why Choose IEW for Critical Fasteners?
Common Questions About IEW
Is Industrial Engineering Works API 20E certified?
Yes. Industrial Engineering Works is certified to API Specification 20E BSL-2 for the manufacture of critical bolting used in petroleum and natural gas industry applications.
What API 20E fasteners does IEW manufacture?
IEW manufactures critical fasteners including fully threaded studs, tap-end studs, double-end studs, bolts, heavy hex bolts, heavy hex nuts and special engineered bolting depending on the applicable specification and customer requirement.
What ASTM fastener grades can IEW manufacture?
Common grades include ASTM A193 B7, B7M and B16; ASTM A320 L7, L7M and L43; ASTM A354 BD; ASTM A453; ASTM A540 and matching ASTM A194 nut grades.
How does IEW maintain traceability?
Identification is maintained from raw material heat number through manufacturing, heat treatment, testing, inspection, marking, documentation and final dispatch according to the applicable specification and customer requirements.
Does IEW supply critical fasteners to the USA?
Can IEW manufacture fasteners from customer drawings?
What quality documentation can be supplied?
Request a Quote for Critical Fasteners
Looking for an API 20E critical fastener manufacturer or a manufacturing source for special ASTM bolting?
Send us your RFQ, drawing, BOM, material specification or project requirement.
Our team can review the technical requirements and provide manufacturing feasibility, documentation requirements, delivery schedule and commercial quotation.