OEM Manufacture & Partner Sourcing · Drawing-Based Supply · Ahmedabad
Custom Fasteners Manufacturer & Precision Sourcing Partner
Precision non-standard bolts, specialized studs, drawing-machined hardware, and customer-print fasteners. Straightforward threaded components manufactured in our Ahmedabad plant; complex cold-headed specials and specialty alloys sourced through vetted partner mills with complete EN 10204 3.1 MTC traceability.
Engineering capability window: in-house manufacturing vs. partner network
We provide complete clarity on our manufacturing boundaries. Fasteners within our Ahmedabad plant’s machinery envelope are produced in-house, while items requiring specialized multi-station cold heading or rare alloys are handled through our audited partner network.
| Technical Parameter | In-House Ahmedabad Plant Capability | Vetted Partner Sourcing Network | Engineering & Quality Controls |
|---|---|---|---|
| Diameter Range | M12 to M72 (Metric) · 1/2" to 3" (Imperial) | M3 to M100+ (Metric) · #4 to 4" (Imperial) | Thread rolling up to M64; cut threading up to M100 |
| Length Envelope | 100 mm to 6,000 mm (Continuous) | 5 mm to 12,000 mm (Cold-headed or forged) | Automated band-saw cutting to ±1.0 mm tolerance |
| Head Geometries | Threaded rods, studs, bent hooks, L/J anchors, welded plates | Hex, socket cap, countersunk, square, oval, round, flange, collar | Forged heads, cold-formed collars, and CNC turned heads |
| Thread Profiles | Metric coarse/fine, UNC, UNF, BSW, left-hand, trapezoidal | Special pitches, multi-start, coil thread, Acme, buttress | Roll-threaded for enhanced fatigue grain alignment |
| Material Scope | IS 2062 E250, EN8 (4.6/4.8), EN19 (8.8), 42CrMo4 (10.9), SS 304/316 | Alloy steel 12.9, brass, bronze, aluminium 6061, duplex 2205 | Full ladle chemical melt analysis on all raw bar stock |
| Surface Finishes | Self-colour (oiled), hot-dip galvanized (ISO 1461), zinc plating | Geomet, Dacromet, zinc-nickel, PTFE, phosphate, black oxide | Salt spray testing up to 1,500 hours via accredited platers |
| Batch MOQ | Flexible short-run (50 - 100 pcs for custom studs/anchors) | 500 kg per SKU default for cold-headed / forged specials | Below-MOQ feasibility batches quoted with tooling surcharge |
| Production Lead Time | 24 - 72 hours for urgent studs; 5 - 10 days for anchor assemblies | 10 - 21 days for in-network; 4 - 8 weeks for new die tooling | Staged delivery schedules aligned to site construction milestones |
Transparent demarcation: what we manufacture vs. what we source
Honest engineering partnerships require unequivocal transparency. Review how our supply routing operates across different custom fastener categories:
Manufactured at Our Ahmedabad Facility
Our plant on Odhav Road houses heavy cold-sawing, automated thread rolling, CNC lathe turning, drilling, and custom bending equipment. We manufacture:
- Custom Foundation & Anchor Bolts: L-type, J-type, plate-welded, and sleeve anchors up to M72 diameter.
- Continuous & Double-Ended Studs: Custom lengths cut, chamfered, and roll-threaded in carbon, alloy, and stainless steels.
- PEB Sag Rods & Structural Tension Stays: Single-end and double-end threaded rods with companion washers and nuts.
- Turned & Machined Specials: Non-standard spacer sleeves, stepped studs, and custom threaded dowels machined from bar stock.
Sourced Through Audited Primary Mills
For custom fasteners requiring multi-die high-speed cold heading or specialized metallurgy outside our machine envelope, we partner with audited mills:
- Cold-Headed Specials: Complex custom bolt heads, indented hex heads, flange profiles, and multi-diameter shanks.
- Specialty Alloy & Non-Ferrous Fasteners: Custom brass, bronze, aluminum 6061-T6, and duplex 2205 fasteners.
- High-Tensile Cold-Forged Bolts: High-volume custom Property Class 10.9 and 12.9 bolts requiring continuous wire-drawn forging.
- Advanced Surface Treatments: Automotive-grade Geomet, Dacromet, PTFE coatings, and specialized zinc-nickel plating.
From print to dock: our 5-step drawing-to-delivery process
Our structured procurement workflow ensures design accuracy, tooling feasibility, and metallurgical compliance at every phase:
Drawing Submission
Customer submits 2D prints (PDF/DWG) or 3D CAD files (STEP) detailing tolerances, material grade, hardness, and required batch quantity.
Engineering Review
Our technical team evaluates manufacturability, confirms in-house vs partner routing, tooling costs, and issues a firm commercial quote within 24 hours.
Tooling & Sampling
For custom forged heads, dies and punches are fabricated. First-article prototype samples are inspected and submitted for customer dimensional sign-off.
Batch Production
Full-run manufacturing begins: cold heading or precision machining, thread rolling, controlled heat treatment, and surface protective plating.
Quality & Dispatch
Final dimensional inspection, hardness checks, EN 10204 3.1 MTC verification, lot-tagged crate packaging, and doorstep logistics dispatch.
MOQ, Commercial Structure & Production Lead Times
| Production Scenario | Minimum Order Quantity (MOQ) | Commercial Pricing Basis | Standard Delivery Lead Time | Operational Considerations |
|---|---|---|---|---|
| In-Network Recipe (Common Alloy & Finish) | 500 kg per SKU | Quoted per kg | 10 - 21 business days | Utilizes existing tooling and active partner rolling lines |
| New Forging Die / Custom Tooling Required | 500 kg + Tooling Cost | One-time die charge + per kg | 4 - 8 weeks | Includes die fabrication, trial runs, and sample piece approval |
| Specialty Non-Ferrous (Brass, Bronze, Duplex) | 500 kg or Batch Value | Quoted per piece / per kg | 6 - 12 weeks | Subject to certified raw ingot availability and specialized machining |
| Below-MOQ Prototype Feasibility Batch | Case-by-Case Evaluation | Per-piece premium | 2 - 6 weeks | Evaluated individually for design prototyping and pre-production validation |
International & domestic standards we deliver to
Whether your equipment drawings originate from European, American, Japanese, or Indian engineering consultancies, our production and sourcing network adheres strictly to published national and international specifications:
| Standard Organization | Referenced Standard Codes | Governing Body | Engineering Application & Industry Alignment |
|---|---|---|---|
| DIN Standards | DIN 912, 931, 933, 976, 7991, 6914, 6921 | German Institute for Standardization | Widely cited for European machinery imports, CNC machine tools, and industrial equipment |
| ISO Standards | ISO 4014, 4017, 4762, 10642, 898-1, 3506-1 | International Organization for Standardization | Global harmonized standards governing metric fastener dimensions, mechanical properties, and stainless grades |
| IS Standards | IS 1363, IS 1364, IS 1367, IS 2062, IS 5624 | Bureau of Indian Standards (BIS) | Indian domestic standards mandatory for public sector infrastructure, power generation, and railway projects |
| ASTM / ASME Standards | ASTM A193, A194, A325, A490, A153, ASME B18.2.1 | American Society for Testing and Materials | Required for oil & gas refinery skids, ASME pressure vessel flanges, and structural steel connections |
| BS Standards | BS 3692, BS 4190, BS 4395 | British Standards Institution | Referenced across legacy heavy engineering projects, Commonwealth export contracts, and marine assemblies |
| JIS Standards | JIS B 1180, JIS B 1186, JIS B 1176 | Japanese Industrial Standards Committee | Common across Japanese automotive plant installations, precision robotics, and machine tooling in India |
| Customer-Print Specials | Proprietary OEM Engineering Drawings & CAD Models | Bespoke Customer Engineering Specifications | Custom step-down shanks, proprietary collars, non-standard threads, and reverse-engineered retrofit parts |
What to include in your drawing: engineering checklist
Providing complete engineering callouts on your initial drawing upload prevents ambiguous assumptions and reduces quote turn-around time by more than 50%:
| Drawing Information Parameter | Recommended Engineering Callout | Functional Importance to Manufacturing |
|---|---|---|
| 2D Technical Drawing / 3D CAD Model | PDF, DWG, DXF, or STEP / IGES format | Provides definitive dimensional geometry, geometric tolerances (GD&T), and critical features |
| Thread Specification & Tolerance Class | e.g. M16 × 1.5 - 6g (Fine) or 3/4"-10 UNC 2A | Determines thread rolling die selection, pitch diameter limits, and thread gauge inspection criteria |
| Material Grade & Base Standard | e.g. AISI 4140, EN19, IS 2062 E250, SS 316L | Governs raw billet procurement, chemical melt analysis, and forgeability parameters |
| Mechanical Property Class & Hardness | e.g. Class 8.8, 10.9, 12.9, or 28-34 HRC | Defines the heat-treatment recipe (quench and temper cycle) to ensure required yield and proof stress |
| Surface Protection & Plating Specification | e.g. HDG (86 µm / ASTM A153), Zinc-Nickel, Geomet 500 | Specifies coating thickness, thread undercut allowance for galvanizing, and salt spray resistance hours |
| Head & Underhead Fillet Geometry | e.g. Head diameter, height, radius r_min, drive type | Ensures proper bearing area distribution and prevents stress concentration cracking under the head |
| Marking & Lot Identification Requirements | e.g. Manufacturer code, property class stamp, customer logo | Determines whether custom embossing dies, head stamps, or secondary laser engraving are required |
| Committed Order Quantity & Call-Off Plan | e.g. 500 kg one-off batch or 2,000 pcs monthly blanket | Enables accurate raw material yield costing and amortization of specialized tooling charges |
| Target Delivery Schedule & Site Pin Code | e.g. Dispatch required within 15 working days to Mundra, Gujarat | Allows dispatch route planning, transport carrier booking, and milestone-based project staging |
| Quality Inspection & MTC Requirement | e.g. EN 10204 3.1 MTC, third-party NABL witness, NDA | Establishes test protocols, physical lab testing, and confidentiality agreements before contract signing |
Engineering decision framework: when to choose custom vs. standard
Specifying custom hardware introduces tooling and setup costs. Review this decision guide to verify whether your mechanical application truly demands a custom drawing part or can utilize standard catalog inventory:
| Joint Design Boundary Condition | Recommended Fastener Strategy | Applicable Grade / Standard | Commercial & Functional Rationale |
|---|---|---|---|
| Non-standard pitch, stepped shank, or custom head | Custom Fastener to Drawing | Sized to Exact CAD Print | No compromise on mechanical joint integrity; tooling matches proprietary engineering design |
| Standard structural steel framing connection | Standard Hex Bolts & Nuts | DIN 931 / 933 (Class 8.8 / 10.9) | Off-the-shelf availability; lowest per-unit cost; explore our dedicated Hex Bolts & Nuts line |
| PEB column base anchoring into concrete footings | Custom Foundation Bolts | IS 2062 / Class 8.8 (In-House OEM) | Manufactured in our Ahmedabad plant with custom bend radii, sleeves, and anchor plates |
| Process piping flange joint under ASME code | Engineered Stud Bolts | ASTM A193 B7 / B8M (In-House OEM) | Manufactured to exact overall length with 2H nuts; explore our specialized Stud Bolts line |
| PEB roof purlin alignment & sag prevention | Structural Sag Rods | IS 2062 E250 (In-House OEM) | Standardized tension rods with threaded ends; explore our dedicated PEB Sag Rods line |
| High-chloride marine or corrosive chemical service | Custom Stainless / Duplex Fasteners | SS 316L / Duplex 2205 | Custom machined from certified bar stock to eliminate crevice corrosion in specialized media |
Standard Hex Hardware
If standard thread diameters and lengths suffice, ordering catalog hex bolts and nuts eliminates tooling lead times and provides immediate dispatch.
Piping Stud Bolts
For high-pressure flange joints, standard ASTM A193 B7 stud bolts manufactured in our Ahmedabad plant provide certified ASME code compliance.
Foundation Anchoring
For structural column footings, our in-house foundation bolts can be fabricated to customized embedment lengths without expensive tooling.
Target industrial sectors & custom engineering applications
We deliver drawing-machined hardware and specialized custom fasteners across India’s primary industrial manufacturing and infrastructure sectors:
Solar Energy Infrastructure
Custom T-head bolts, proprietary aluminum rail clamp studs, and specialized anti-theft solar hardware engineered to withstand severe wind uplift in utility ground-mount and rooftop solar arrays.
Construction & Civil Infrastructure
Non-standard heavy foundation anchors, oversized bridge bearing bolts, tunnel segment bolts, and bespoke anchor plates designed to civil engineering CAD blueprints.
Automotive & Heavy Engineering
Stepped suspension pins, high-tensile transmission studs, custom wheel studs, and engine mount bolts manufactured to tight dimensional runout and high fatigue cycle tolerances.
Heavy Industrial Machinery
Custom shoulder guide bolts, hydraulic manifold fasteners, tool-and-die tie rods, and reverse-engineered legacy replacement bolts for imported industrial machinery.
Intellectual property protection & drawing confidentiality
Strict Drawing Confidentiality & Mutual NDA
We understand that custom fastener drawings contain proprietary engineering geometry, patented thread combinations, and trade secrets. We maintain strict IP safeguards:
- • Mutual NDA Available: We execute mutual non-disclosure agreements prior to reviewing proprietary drawings upon customer request.
- • Controlled Sourcing Dissemination: Drawings are shared only with the dedicated technical quoting team and the audited production mill fabricating the part.
- • No Public Portfolio Usage: Customer drawings, CAD files, and client part numbers are never published on our website or marketing literature without written authorization.
- • Legal Protections: All customer-submitted drawings remain the 100% intellectual property of the purchasing client under our terms of supply (IP and confidentiality).
Transparent Boundary Exclusions (When We Decline Work)
Trust is built on knowing what a supplier will NOT do. We decline inquiries outside our verified competency envelope:
- • Aerospace Flight-Critical Hardware: We do not quote AS9100 flight-critical aerospace fasteners or export-controlled defense ordnance components.
- • Medical Device Fasteners: We decline implantable surgical fasteners or Class II/III medical hardware requiring cleanroom passivation.
- • Nuclear Primary Circuit Fasteners: We do not supply ASME Section III nuclear primary containment pressure vessel hardware.
- • Automotive PPAP Level 3 Without Audit: Full automotive PPAP Level 3 documentation packages are accepted only where annual volume and audit agreements are established in advance.
Standard product lines & companion hardware
Consolidate your hardware procurement by pairing custom drawing fasteners with our standard manufactured and distributed industrial fastener lines:
Foundation Bolts
In-house manufactured L-type, J-type, and welded plate foundation anchor bolts for heavy structural steel and pre-engineered building base columns.
OEM foundation-bolt catalogue
Stud Bolts
High-pressure continuous threaded studs and double-ended engineering stud bolts manufactured in Ahmedabad to ASTM A193 B7 and stainless steel grades.
OEM stud-bolt catalogue
PEB Sag Rods
Manufactured tension sag rods with single or double threaded ends designed to support purlin alignment in pre-engineered steel buildings.
OEM-manufactured sag rods
High-Tensile Fasteners
Comprehensive material guide for Property Classes 8.8, 10.9, and 12.9 quenched and tempered carbon and alloy steel fasteners.
high-tensile grade decision guide
Stainless Steel Fasteners
Corrosion-resistant austenitic and marine-grade stainless steel fasteners in Grades 304, 316, and 316L for chemical and coastal environments.
SS 304 / 316 / 316L for your serviceFrequently asked questions: custom fasteners & drawing sourcing
Detailed engineering answers regarding CAD formats, tolerance limits, tooling costs, MTC documentation, and production scheduling.