Use it for wrench-flat parts
Hex bar is practical when the final component needs flat sides, nuts, couplings, valve parts or connector bodies.
Hex Bar Supply
Stainless Steel Hex Bar for
Stainless Steel Hex Bar for
CNC Machining and Fasteners
Stainless steel hex bar helps buyers reduce extra milling when the final part already needs wrench flats, hex profiles or across-flats control. Buyers can review 303 stainless steel hex bar, SUS303 hex bar, 304 stainless steel hex bar and 316 stainless steel hex bar by S size, finish and cutting plan.
1,000+ Tons
Bar ready stock
303 / 304 / 316+
Grade paths
S5 - S75 mm
Typical AF review
CNC / Fasteners
Best-fit use
Quick Answer
When should buyers choose stainless steel hex bar?
Reduce extra milling
Starting from hex bar can reduce profile machining when the across-flats size matches the drawing.
Confirm stock by grade and AF size
1,000+ tons stainless steel bar ready stock supports 303, 304, 316 and other requested grades. Current availability depends on grade, size, finish and cutting requirement.
Use buyer language and formal standards together
SUS303 hex bar and ASTM 304 stainless steel hex bar are common buyer search terms; final standard and MTC wording should be confirmed before order.
Specification Reference
Stainless steel hex bar supply reference
| Item | Common Review | Buyer Note |
|---|---|---|
| Grades | 303 / SUS303 / 304 / 316+ | 303 and SUS303 hex bar are reviewed for machinability; 304 and 316 hex bar are chosen by general use, corrosion risk or drawing requirements |
| Standards | ASTM A276 / ASTM A479 / JIS G4303 review | Use formal standard wording when the drawing or MTC requires ASTM or JIS documentation. JIS G4303 may appear with SUS303 hex bar or SUS304 hex bar buyer wording |
| Size | S5 - S75 mm across flats | Confirm whether the drawing uses metric AF, inch AF or finished part size |
| Finish | Cold drawn / bright / polished review | Finish path depends on size, grade and machining target |
| Tolerance | h9 / h11 or project review | Across-flats tolerance should be confirmed from the drawing |
| Service | Cut-to-length / packing labels / MTC | Useful for fastener, connector and valve-part buyers |
Useful Tool
Open Weight Calculator
Calculate hex bar theoretical weight
Check estimated hex bar weight from across-flats size, grade and length before quotation.
Applications
Where stainless steel hex bar fits
Fasteners and nuts
Hex bar is a natural starting form for parts that keep a hex profile.
NutsFastener blanks
Valve and coupling parts
Useful for machined parts that need wrench flats or profile control.
Valve partsCouplings
Automatic screw machining
303 hex bar can be reviewed when chip control and repeat machining are important.
303 optionBar-fed CNC
304 and 316 hex bar stock
304 stainless steel hex bar is a practical general-use option, while 316 stainless steel hex bar is reviewed for higher corrosion risk.
304 option316 option
Across-Flats Size Reference
Stainless steel hex bar across-flats review
Hex bar buyers should confirm S size or across-flats size before quote. This table is a sourcing reference, not a fixed stock promise.
| Hex Bar Path | Common AF Review | Common Grades | Typical Use | Buyer Note |
|---|---|---|---|---|
| Small AF hex bar | S5 - S14 mm review | 303 / SUS303 / 304 | Small nuts, pins, connector blanks | Confirm bar feeding, tolerance and cut length |
| Medium AF hex bar | S15 - S40 mm review | 303 / 304 / 316 | Couplings, fittings, valve parts | Good path when final part keeps wrench flats |
| Large AF hex bar | S41 - S75 mm project review | 304 / 316 review | Larger fittings and project components | Confirm availability, finish and shipment plan early |
| 303 stainless steel hex bar | CNC-size review | 303 / SUS303 | Automatic lathing and repeated machined parts | Review sulfur, MTC and chip-control needs |
| 304 stainless steel hex bar | General AF review | 304 / SUS304 / Inox 304 Hex Rod | Nuts, general fittings and stock supply | Use buyer term and formal standard together |
| 316 stainless steel hex bar | Corrosion-focused AF review | 316 / 316L | Coastal fittings and chemical-use parts | Review Mo content and exposure condition |
Related Shapes
Compare hex bar with round and square bar
Stainless Steel Round Bar
Use round bar when the part starts from a turned diameter, shaft or pin shape.
Stainless Steel Square Bar
Use square bar when the part keeps flat sides or needs bracket and support blanks.
Stainless Steel Flat Bar
Use flat bar when the part needs a wider rectangular section for brackets, frames or supports.
303 Stainless Steel Bar
Review 303 and SUS303 bar when machinability and chip control matter.
Keyword Fit
Use hex bar terms the way buyers search and engineers specify
Buyers may search for 303 stainless steel hex bar, SUS303 hex bar, 304 stainless steel hex bar, 316 stainless steel hex bar or hex bar across flats size. In the final quote, the standard, grade, S size, finish, tolerance and MTC requirement should be confirmed together.
Buyer search terms
SUS303 hex bar, SUS304 hex bar, Inox 304 Hex Rod and ASTM 304 stainless steel hex bar can all point to different document needs.
Engineering terms
Across-flats size, S size, tolerance and cut length are more useful than weight alone for quoting hex bar.
Supply note
Current availability depends on grade, across-flats size, finish, cut length and stock condition.
Buyer Fit
Use hex bar when the part shape can save machining time
Hex bar should not be chosen only because it looks convenient. It is most useful when the across-flats size, grade and final part geometry match the drawing.
Best fit
Best for nuts, couplings, valve parts, connector parts and wrench-flat components.
Not ideal for
Not the first choice when a round bar can be turned faster or when the hex profile will be fully removed.
Drawing note
Send across-flats size, grade, tolerance, cut length and final part use for a cleaner quotation.
Related Reading
Read the guides behind hex bar selection
303 vs 304 Stainless Steel Bar for CNC Machining
Compare 303 and 304 when machinability and chip control are part of the hex bar decision.
Stainless Steel Hex Bar for CNC Machining
See when hex bar can reduce extra milling and how to specify across-flats size.
Round Bar vs Hex Bar vs Square Bar
Compare shape choice when the final part may start from round, hex or square stainless bar.
303 Stainless Steel Bar Machinability and Sulfur Guide
Review sulfur, MTC data and chip control when 303 hex bar is used for repeated CNC machining.
How to Read and Verify a Stainless Steel MTC
Check heat number, grade, chemistry and document consistency before releasing a hex bar order.
h9 vs h10 vs h11 Tolerance for Cold Drawn Stainless Steel Bar
Use this guide when tolerance affects across-flats review or CNC feeding behavior.
FAQ
Stainless steel hex bar FAQ
What is stainless steel hex bar used for?
It is commonly used for nuts, couplings, valve parts, fastener blanks and machined parts that need wrench flats.
Is 303 hex bar good for CNC machining?
Yes. 303 stainless steel hex bar and SUS303 hex bar are often reviewed when machinability, chip control and repeated turning are important.
What does S size mean for hex bar?
S size usually refers to the across-flats size of the hex bar. Buyers should confirm it against the drawing.
Can 304 and 316 stainless steel hex bar be supplied?
Yes. 304 stainless steel hex bar and 316 stainless steel hex bar can be reviewed by across-flats size, finish, quantity, MTC requirement and current stock.
Can stainless steel hex bar be cut to length?
Yes. Cut-to-length support can be reviewed based on grade, size, quantity and packing requirement.
Send the grade, across-flats size and part use for your hex bar inquiry.
Share whether you need 303, SUS303, 304, 316 or another requested grade, plus S size, tolerance, cut length, quantity and destination.
Contact Sales Team