Custom Fasteners
Manufacturer
Mumbai · India
Standard vs Custom — When a Catalogue Part Isn’t Enough
The large majority of applications are correctly served by a standard, catalogue-specified fastener — one of the many product pages across our site covering standard thread sizes, standard head forms, and standard material grades. Custom manufacturing exists specifically for the requirements a standard catalogue part cannot meet: a non-standard overall length, a non-standard thread pitch, a head or drive combination not offered as standard, a material or grade combination we don’t carry pre-stocked, or a part geometry specific to one piece of equipment or one application.
A genuinely useful way to decide is simple: if your requirement can be fully described by picking from the size charts and material options already on our standard product pages, it almost certainly should be — standard parts are faster to source, more cost-effective, and backed by established stock and tooling. Custom manufacturing is the correct path specifically when at least one dimension, feature, or specification genuinely falls outside what a standard part offers.
Once a requirement is genuinely custom, the entire value of working with a specialist manufacturer is in the process that takes a drawing — or even just a physical sample with no drawing at all — through to a fully verified, certified, delivered part without costly surprises at full production scale. That process is covered step by step below.
Why Work With a Specialist — Not Just Anyone With a Lathe
DFM Feedback Before Tooling Is Committed
Reviewing a drawing for design-for-manufacturability issues before production tooling is cut catches problems while they’re still cheap to fix, rather than after a full run is already produced.
First Article Inspection Before Full Production
A small initial sample is fully dimensionally verified against the drawing before the full production run begins — the single most important safeguard against a costly scale error.
Access to Our Complete Material Range
Custom parts can be manufactured in any material grade across our site — from general carbon steel through stainless, super duplex, SMO 254, and Hastelloy — not limited to a narrow custom-shop material list.
Reverse Engineering When No Drawing Exists
Where an original drawing has been lost or never existed, we can measure a physical sample directly and produce a full manufacturing specification from it.
The Custom Manufacturing Process — Step by Step
Every custom order follows this same structured path, regardless of quantity or complexity.
Drawing & Requirement Review
We review your drawing, sample, or written specification against manufacturability, available tooling, and material options — flagging any ambiguity before quoting.
DFM Feedback & Quotation
Where a design detail could be simplified or made more robust without affecting function, we provide honest design-for-manufacturability feedback alongside a firm quotation.
Tooling & First Article Production
Production tooling is set up and a small first article sample batch is produced — intentionally kept small before any commitment to the full production run.
First Article Inspection (FAI)
Every dimension on the first article sample is measured and compared against the drawing, with a full inspection report issued before proceeding — covered in detail below.
Full Production Run
Once the first article is approved, the full production quantity is manufactured using the same verified tooling and process parameters.
Final Inspection & Documentation
Completed parts undergo final dimensional and mechanical inspection, with MTC, dimensional reports, and any specified certification issued before dispatch.
First Article Inspection — Catching Errors Before They Scale
First Article Inspection (FAI) is the practice of producing a small initial batch of a new custom part — often just one to a handful of pieces — and subjecting it to complete dimensional and, where applicable, mechanical verification against the engineering drawing before committing to the full production run. Every dimension, tolerance, thread specification, and material property called out on the drawing is checked and documented in a formal FAI report.
The value of this step is straightforward: a dimensional or process error caught at the first article stage costs the time and material of a handful of parts to correct. The same error, undetected until the full production run is already complete, costs the time and material of the entire order — and in the worst case, a part that fails to fit or function correctly once it reaches the customer’s assembly line, with all the downstream cost and schedule impact that failure carries.
This is precisely why we treat first article inspection as a mandatory step on every custom order, not an optional add-on — the full production run does not begin until the first article has been measured, verified against the drawing, and formally approved. This single discipline is the difference between a custom manufacturing process a customer can rely on at scale, and one that simply hopes the tooling was set up correctly.
What We Need From You
The more of this you can provide upfront, the faster and more accurate your quote will be.
Drawing or Sketch
A dimensioned drawing, CAD file, or even a clear hand sketch with key dimensions noted.
Material & Grade
Specific material and property class required, or the application environment if you need a recommendation.
Quantity
Total quantity required, and whether this is a one-time order or an ongoing production requirement.
Critical Tolerances
Which dimensions are critical to function versus general — helps us focus manufacturing and inspection effort correctly.
Surface Finish
Required coating, plating, or finish — or the service environment if you need a recommendation.
Testing & Certification
Any required MTC, NABL testing, PMI verification, or third-party inspection requirements.
Reverse Engineering — From Physical Sample to Manufacturing Spec
Not every custom requirement starts with a drawing. Original drawings are frequently lost over the years, especially for legacy equipment, older machinery, or parts originally sourced from a supplier no longer in business. Where a physical sample exists but no drawing does, we can measure the part directly and produce a complete manufacturing specification from it — thread size and pitch, overall dimensions, head and drive geometry, and, where possible, material composition.
This reverse engineering process typically involves precision measurement of the physical sample across every relevant dimension, thread gauging to confirm exact thread specification, and, where material identity is uncertain, material testing or PMI verification to confirm composition before a replacement part is manufactured to match.
This capability is particularly valuable for maintaining legacy equipment where a single failed or worn fastener needs an exact replacement, and no other path to a correct manufacturing specification exists. Contact our team with the physical sample or detailed photographs and measurements to begin the reverse engineering process.
Custom Fastener Application Areas
Wherever a specific application, legacy equipment, or unusual material requirement falls outside standard catalogue offerings.
Legacy Equipment Maintenance
no original drawing available
OEM Component Manufacturing
ongoing supply agreements
Process Plant & Refinery
application-specific configurations
Offshore & Marine
project-specific specifications
Structural & Infrastructure
non-standard lengths and grades
Prototype & Low-Volume Development
design validation parts
Power Generation
custom high-temperature fasteners
General Special-Purpose Machinery
any material, any configuration
Complete Documentation Package
Grade / Heat Number
Report
Against Drawing
Conformance
On Request
Related Fastener Types & Materials
Before going custom, check whether a standard product already covers your requirement — our full range spans every common configuration.
Full Bolt Range
Complete standard bolt manufacturing capability — check here before assuming your requirement needs to be custom.
View Bolt Range →Full Nut Range
Complete standard nut manufacturing capability across every specialty type in our range.
View Nut Range →Super Duplex Fasteners
One of several exotic alloy material options available for custom manufacturing beyond standard stainless grades.
View Super Duplex →Hastelloy B-3 Stud Bolts
Custom stud bolt manufacturing in extreme chemical-duty exotic alloy grades.
View Hastelloy B-3 →Have a Drawing
or a Sample?
Send your drawing, sketch, or physical sample. Akbar Fasteners Pvt. Ltd. responds within 24 hours.
Export: +91 8696 32 4646 · Support: +91 800 9315 333 · export@akbarfasteners.in