316L Hex Flange Bolts
ISO 4162 · ASME B18.2.1ASTM A276 / A479 — bar
316L hex flange bolts for corrosion-exposed machine covers and brackets, with an integral bearing flange that simplifies handling at repeated assembly points.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed
EN 10204 3.1 MTC + heat-number traceability
316L in this connection
Molybdenum-bearing, low-carbon austenitic stainless steel for wet equipment and routine washdown.
- Connection
- Washdown machine covers & automation brackets
- Critical dimensions
- Under-head length · flange diameter · seating face
Which standard is on your order?
Raw Material Specifications
Finished-Bolt Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Solution annealed; cold worked for strengthened conditionsSolution annealing restores a ductile corrosion-resistant structure, while specified cold work raises strength without precipitation aging.
What we can make in 316L
Forms & dimension guide
Integral flange
Use on mounting brackets and equipment covers to distribute head load over a wider seat and reduce loose parts during assembly. The flange needs a flat landing clear of nearby walls and radii.
Plain bearing face
Choose a plain underside for finished or coated seats where teeth would mark the surface. It also permits controlled sliding at the head-seat interface during tightening.
Flange vs loose washer
An integral flange speeds repeated assembly by keeping the bearing surface with the bolt. Retain a separate washer when the joint needs a replaceable wear face or a specifically hardened bearing layer.
- Product forms
- Smooth bearing flange · Drawing-specified bearing face
- Dimensional control
- Under-head length · flange diameter · seating face
- Manufacturing
- CNC-machine sample heads and bearing flanges. For production, form the blank by the suitable cold-heading or hot-forging route and finish the seating face and threads.
- Final condition
- Solution annealing establishes the specified stainless condition; age hardening is not the strengthening route.
- Inspection
- Chemistry including carbon · dimensional inspection · specified mechanical properties
Where 316L fits — and what matters
Industrial Machinery & Automation
Machine frames and positioning fixtures316L hex flange bolts clamp machine frames and positioning fixtures through an integral flange that spreads head load over the mounting face. Alignment, operating cycles and replacement access define the working interface.
Food & Beverage Equipment
Conveyor and washdown-equipment brackets316L hex flange bolts clamp conveyor and washdown-equipment brackets through an integral flange that spreads head load over the mounting face. Cleaning liquid can remain under the part; exposed finish and access for cleaning matter at the assembled joint.
Water Treatment & Desalination
Membrane-skid and pump supports316L hex flange bolts clamp membrane-skid and pump supports through an integral flange that spreads head load over the mounting face. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Same hex flange bolt. Different material priorities.
316L material dataDuplex 2205
Duplex stainless combines higher yield strength than conventional austenitic grades with improved resistance to chloride stress-corrosion cracking.
Duplex 2205 Hex Flange Bolts904L
High nickel and molybdenum, with copper, extend corrosion resistance beyond 316L in selected acid and chloride duties.
904L Hex Flange BoltsInconel 625
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
Inconel 625 Hex Flange Bolts17-4 PH
Precipitation-hardening stainless offers a choice of strength, hardness and toughness through its H-condition.
17-4 PH Hex Flange BoltsFrom drawing to documented delivery
- 01Drawing & BOMGrade, condition and part dimensions
- 02Sample lotOptional · typically ~20 days
- 03Production & testingTypically 25–35 days
- 04Documents & dispatchHeat-linked lots and packing
Connection & acceptance
Washdown machine covers & automation brackets: Cleaner chemistry · bearing-face geometry · installation access.
Material & final condition
Solution annealing establishes the specified stainless condition; age hardening is not the strengthening route.
Connection inspection
Under-head length · flange diameter · seating face. Chemistry including carbon · dimensional inspection · specified mechanical properties.
Build your 316L hex flange bolt enquiry
Upload drawing insteadQuestions about 316L hex flange bolts
Smooth flange or serrated flange on a 316L order?
Specify the bearing face on the drawing. Serrations can mark a coated or stainless mating surface; a smooth flange is a different interface and does not automatically provide a locking function.
Technical references & photo credits
Catalogue photography shows product form. Application examples connect alloy properties to equipment duties; they are not customer installation records. Quantities, schedules and the inspection scope are confirmed in the quotation.