Stainless Steel Wedge Anchors
Through-Fixing Expansion Anchors for Concrete & Structural Installations
304 / A2 and 316 / A4 stainless mechanical expansion anchors for fastening steel fixtures, machinery and support components to concrete. A tapered stud engages a short expansion clip as the nut is tightened.
Product Overview
Stainless Steel Wedge Anchors, also purchased as Through Bolt Anchors or Concrete Wedge Anchors, comprise a threaded stud, tapered expansion end, short expansion clip, hex nut and flat washer. The clip is near the embedded end rather than forming a long sleeve around the stud. These are distinct from sleeve anchors, drop-in anchors, chemical anchors and concrete screws.
Through-fixing allows the anchor to pass through a steel fixture into a prepared concrete hole. Tightening the nut moves the tapered stud relative to the clip, expanding the clip against the hole wall. Correct drilling, debris removal, embedment and installation procedure are essential; pre-positioned arrangements may differ according to the exact model and project.
For an RFQ, provide anchor diameter, overall and thread lengths, fixture thickness, required embedment, concrete condition, complete-assembly stainless grade, quantity and project or approval requirements. Include drawings and the installation specification where available so the supplied configuration can be confirmed.
Technical Specifications
For safety-critical structural anchoring, performance must be based on the exact model, concrete condition, embedment and applicable project specification or approval. Cracked/non-cracked concrete, static or seismic loading and fire resistance are not assumed capabilities. Load, torque, spacing, edge distance and concrete thickness requirements must come from verified model data and project design, not generic values.
Expansion Clip, Embedment & Installation Selection
Before installation, obtain the instructions for the supplied model and confirm drill-hole diameter, minimum hole depth, cleaning method, nominal / effective embedment as applicable, and tightening requirements. The technical illustration is schematic, not a dimensioned manufacturing drawing or a substitute for these instructions.
304 / 316 Stainless Steel & Anchor Size Options
304 / A2 is an option for many general industrial and outdoor applications depending on exposure. 316 / A4 generally offers better chloride corrosion resistance than 304 / A2, but does not guarantee freedom from corrosion in every marine environment.
A2 and A4 are common stainless steel fastener material-category designations; 304 and 316 are common stainless steel grade designations. They are commonly associated, but A2 is not strictly identical to one particular 304 grade in every case, nor A4 to one particular 316 grade. Confirm composition, mechanical properties and applicable requirements from component documentation and the governing standards. See our 304 vs 316 stainless steel fastener selection guide.
Distinguish general outdoor / coastal atmosphere from salt spray and splash exposure, continuous seawater immersion, and high-chloride or aggressive chemical environments. Selection must consider actual exposure, all component materials, crevice corrosion, dissimilar-metal contact, and project design and maintenance requirements. 316 / A4 is not a universal marine-grade solution.
Confirm material grades separately for the threaded stud, expansion clip, nut and washer in the quotation and component documentation. The stud material alone does not establish the grade of the complete assembly. Concrete exposure, fixture material, galvanic compatibility and project requirements all affect selection; grade should not be selected by strength alone.
Common commercial sizes are referenced for selection. Actual diameter, length, component configuration and availability are subject to order requirements and confirmation. Overall lengths, thread lengths and fixture capacities must be checked for the exact model.
Anchor Length, Fixture Thickness & OEM Supply
Anchor Geometry & Quality Documentation
Approval numbers, CE marking, ETA or ICC-ES documents and performance certificates are supplied only where genuinely available for the exact product. No approval is implied by the product photographs or material grade.
Applications
Fastening steel plates, frames and support structures to concrete foundations under the appropriate design.
Anchoring equipment feet, machinery bases and industrial supports where the concrete anchor design is specified.
Suitable concrete-mounted railings and barriers subject to project design and verified anchor requirements.
316 / A4 material options for corrosion-sensitive exterior and coastal installations.
Supply according to anchor diameter, overall length, complete-assembly grade, packaging and project specifications.
Frequently Asked Questions
What is a Wedge Anchor?
A mechanical expansion anchor comprising a threaded stud with tapered end, expansion clip, nut and washer, intended primarily to fasten fixtures to concrete.
What is the difference between a Wedge Anchor and a Sleeve Anchor?
A wedge anchor uses a short expansion clip near its embedded end. A sleeve anchor uses a larger sleeve around part of its body. They are different systems and must not be treated as interchangeable.
Can Stainless Steel Wedge Anchors be used outdoors?
304 / A2 and especially 316 / A4 are options for different outdoor corrosion environments. Select according to actual exposure and the material of the entire assembly, not the stud alone.
How do I select Wedge Anchor length?
Consider required embedment, fixture thickness, nut and washer allowance, thread projection and project specification. Confirm the exact model dimensions; a longer anchor does not automatically carry a greater load.
Can VALTOR provide load data or anchor approvals?
Testing, approval and performance documentation can only be supplied where available for the exact anchor model and specification. Confirm requirements at enquiry; do not transfer generic load values or approvals from another anchor.
Related Products
Related products are listed for reference. Replacement nuts, washers or other components must meet the dimensional, material and performance requirements of the specified anchor assembly. They should not be assumed interchangeable.
Send the required diameter and overall length, stainless steel grade for the stud and clip, nut and washer material requirements, fixture thickness, required embedment or project design requirements, concrete type and condition, quantity, project drawings or reference photos, and required inspection or material documentation.
If embedment is unknown, submit project drawings or design requirements for further confirmation; do not estimate engineering parameters. Use our industrial fastener RFQ checklist to prepare your enquiry.