Source EN31 / 100Cr6 / AISI 52100 Fastener to specification
Build a supplier-comparable enquiry by defining bolt / nut / stud / screw / washer type, diameter, thread, length, property requirement, finish and test documentation, material designation, governing standard and edition, quantity, destination, acceptance criteria and required certification.
RFQ definition: bolt / nut / stud / screw / washer type, diameter, thread, length, property requirement, finish and test documentation.
Typical family applications: oil and gas, pressure equipment, automotive, machinery, shafts, gears, structural and general engineering applications. Suitability remains the buyer's engineering decision.
EN31 / 100Cr6 / AISI 52100 Fastener sizes and dimensions to specify
Useful enquiry selectors—not an inventory or universal availability claim. Exact manufacturability is confirmed against grade, standard, route, tolerance and quantity.
Fastener grade, thread system, property requirement, coating and dimensions must be specified together.
Range guide: Common enquiry guide: metric M3 to M100 and inch 1/8 to 4, subject to product type, grade and manufacturing route.
| Thread | Metric coarse / fine, UNC / UNF / other stated thread and pitch |
|---|---|
| Length | Under-head or overall length definition must match the fastener type |
| Finish | Plain / passivated / zinc / hot-dip galvanized / buyer-approved coating |
Common EN31 / 100Cr6 / AISI 52100 Fastener size and RFQ examples
Use these as enquiry-format references only. They are not a stock list, dimensional standard substitute or availability promise.
| Thread size | Pitch example | Length example | Specification line | Example RFQ line |
|---|---|---|---|---|
| M6 | 1.0 mm coarse | 20 / 30 / 50 mm | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — M6 / 1.0 mm coarse / 20 / 30 / 50 mm / type + grade + finish |
| M8 | 1.25 mm coarse | 25 / 40 / 60 mm | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — M8 / 1.25 mm coarse / 25 / 40 / 60 mm / type + grade + finish |
| M10 | 1.5 mm coarse | 30 / 50 / 80 mm | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — M10 / 1.5 mm coarse / 30 / 50 / 80 mm / type + grade + finish |
| M12 | 1.75 mm coarse | 40 / 60 / 100 mm | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — M12 / 1.75 mm coarse / 40 / 60 / 100 mm / type + grade + finish |
| M16 | 2.0 mm coarse | 50 / 80 / 150 mm | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — M16 / 2.0 mm coarse / 50 / 80 / 150 mm / type + grade + finish |
| M20 | 2.5 mm coarse | 60 / 100 / 200 mm | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — M20 / 2.5 mm coarse / 60 / 100 / 200 mm / type + grade + finish |
| 1/2 inch | 13 TPI UNC example | 2 / 3 / 4 inch | type + grade + finish | EN31 / 100Cr6 / AISI 52100 Fastener — 1/2 inch / 13 TPI UNC example / 2 / 3 / 4 inch / type + grade + finish |
EN31 fastener RFQ checks
EN31 is not by itself a complete fastener specification. Supply should be based on the buyer drawing or fastener standard plus diameter, thread form and pitch, length, head or nut geometry, finish and quantity.
Required material condition, heat treatment, hardness or mechanical testing must be stated explicitly. A common fastener property class or substitute steel must not be inferred from the EN31 designation.
Inspection planning guide · Standards context · Send exact RFQ
How we compare EN31 / 100Cr6 / AISI 52100 Fastener manufacturers
Grade designation, heat traceability and required certification are matched to the RFQ.
Route, size range, tolerances, heat treatment and form-specific capability are checked.
Dimensional, visual, PMI / chemistry, mechanical or NDT controls are defined where applicable.
MTC, inspection records, packing and export documents are aligned before dispatch.
No material grade, route, standard or dimension substitution without written buyer approval.
Supplier offers are compared on the same technical basis before commercial selection.
EN31 / 100Cr6 / AISI 52100 Fastener sourcing questions
How do I source EN31 / 100Cr6 / AISI 52100 Fastener from India?
Send the exact material designation, product standard, bolt / nut / stud / screw / washer type, diameter, thread, length, property requirement, finish and test documentation, quantity, destination and required inspection. India Supply Solutions then identifies and compares suitable Indian manufacturers or suppliers.
How do I compare the qualified EN31 / 100Cr6 / AISI 52100 Fastener manufacturers in India?
Compare actual capability for the named grade and form, applicable standard, traceability, test documentation, delivery record, inspection readiness and commercial transparency—not only the lowest quoted price.
Can you quote EN31 / 100Cr6 / AISI 52100 Fastener price in India?
Yes, after grade, standard, dimensions, quantity, packing and delivery basis are defined. We do not publish a fabricated fixed price for specification-sensitive metal products.
What documents should be requested for EN31 / 100Cr6 / AISI 52100 Fastener?
Depending on the requirement, buyers may request MTC / heat traceability, inspection records, PMI or chemistry verification, mechanical tests, NDT and packing / export documents.

