COMPONENTS / FASTENER MATERIAL
BAR STOCK & SEMI-FINISHED MATERIAL
Fastener bars& bolt materials.
Bar stock and semi-finished blanks for bolts, studs and threaded fasteners.
Enquire about supply →
Prepared bar reference
SUPPLY OPTIONS
Round bar stock
Bar stock for your subsequent forming, machining and heat-treatment route. Agree the material standard, stock dimensions, condition and material inspection records.
Prepared bar
Bar with the ordered surface preparation and heat-treatment condition. Identify remaining forming or machining and the checks required at this handover.
Thread-ready bar & blanks
Semi-finished bar or blanks for the specified threading and finishing sequence. Define remaining operations, coating and final fastener testing separately.
Material routes: 35CrMo · 42CrMo4 / SAE 4140 · 40Cr
Grade standard, dimensions and condition are agreed to order.
Review material, thread and heat-treatment requirements. A material grade alone does not establish the finished fastener’s property class.
Bar preparation
Mill-linked material selection, managed Q&T and our own bar preparation support your fastener production route.
Mill partnerships → Processing options →Related steel materials.
Redacted bar-material example: chemistry, mechanical results and inspection status. Finished-fastener certification and final coatings are separately defined.
Technical details, inspection and quotation requirements
FASTENER MATERIAL
Fastener bars & bolt materials.
Round bar stock and semi-finished materials for bolts, studs, threaded rods and fastener blanks.
Enquire about supply ↗
- 35CrMo
- Primary alloy route
- 42CrMo4 / 4140
- Higher-strength route
- Q&T
- Delivery option
Supply options
Round bar stock
Alloy steel bar for bolt, stud and fastener production.
Prepared bar
Surface preparation, heat treatment and machining allowance to order.
Thread-ready & blanks
Thread-ready material and semi-finished blanks, with remaining operations agreed.
Available processing Heat treatment · Surface preparation · Cutting & blank preparation · Thread-route preparation
Finished-fastener certification and final coatings are agreed separately.
FROM THE SUPPLY FLOOR
Material route details
Component route 04
Fastener Bars & Bolt Materials
Round bars and semi-finished materials for bolts, stud bolts, threaded rods and fastener blanks.
Bar stock and semi-finished blanks for bolts, studs and threaded fasteners.
Supply requirements
Five details to agree before ordering.
Specify the part, material, delivery condition, inspection requirements and quotation details together.
- 01ComponentFasteners
- 02Grade35CrMo
- 03ConditionQ&T
- 04InspectionMechanical testing
- 05RFQDrawing + destination
Duty inputs
Operating and dimensional requirements
- Final load
- Strength or hardness target
- Thread rolling or thread machining
- Heat-treatment condition
Candidate grades
Steel grades and delivery condition
- 35CrMoPrimary alloy route for fastener-bar review.
- 42CrMo4 / 4140Primary higher-strength route for demanding fasteners.
- 40CrAlternative alloy route after final load and thread review.
- Project-specific routeConfirm strength class, thread route and condition.
Supply and release
Inspection and batch traceability
- Supply stages
- Q&T · Peeled or prepared bar · Thread-ready material
- Inspection
- Mechanical testing · Surface condition · Dimensions
Production handoff
Connect bar condition to the next operation.
The order should state who is responsible for heat treatment, bar preparation, machining allowance, finishing and release inspection.
- Heat treatment
- Surface preparation
- Cutting and blank preparation
- Thread-route preparation
Source imagery
See the component context.
Materials prepared for fastener and thread processing routes.
Surface and dimensional preparation can support downstream processing.
Raw or semi-finished materials can be matched to strength and finish requirements.
Long threaded materials support stud bolt and heavy-duty fastener production.
Foundation fastener application example.
RFQ checks
Questions buyers ask first.
When should buyers compare 35CrMo and 42CrMo for fasteners?
35CrMo and 42CrMo / 42CrMo4 are often compared when buyers need high-strength threaded parts. The choice should consider load, heat treatment, diameter, thread route, mechanical properties, and inspection requirements.
Should fastener bar RFQs include coating or surface protection?
Yes, when the final part needs zinc coating, corrosion protection, outdoor storage, marine exposure, or project-specific finishing. Protection requirements can affect processing route, packing, and documentation.
Which documents are useful for fastener bar orders?
Useful documents may include MTC, heat number traceability, mechanical or hardness records if specified, dimensional inspection, surface or coating records when applicable, packing list, and shipment documents.
Technical references
Technical guides and specifications.
Machined couplers, bolts and studsReview drawing-based machining, heat treatment and inspection requirements.35CrMo / 4135 / 34CrMo4 round bar for fastenersReview the 35CrMo grade-standard, heat-treatment, thread, inspection, and RFQ route.40Cr / 41Cr4 / SCr440 round bar for bolts and fastenersReview the 40Cr grade, condition, thread route, and inspection scope for bolt and fastener RFQs.Fastener bar material selection before RFQChoose fastener bar from the finished bolt, stud, or threaded component—not from a familiar alloy name. The thread and heat-treatment routes matter.Threaded rod and tie bar RFQ checklistThreaded-rod and tie-bar RFQs need the supplied assembly, thread details, material condition, inspection, protection, and packing.
Component RFQLock the route before quotation.
Share the bolt or stud drawing and the required bar condition to start an enquiry.
Send grade, dimensions, quantity and the work required before delivery.
Contact JOTAIN →Discuss your project
Send your requirements directly to JOTAIN. We will reply to your email.
For a detailed quote, include the drawing, grade or standard, required final properties, bar and finished dimensions, threading or coating work, inspection records, quantity and destination. You can send an initial enquiry with the information available.