High Vibration Resistance Structural Blind Rivet · Steel · 4.8 mm & 6.4 mm · Stocked in Bengaluru
Standard Anlock-Out Bolt Blind Rivetb(OB) sizes stocked at our Bengaluru store. The OB rivet is available in steel only. Grip range is the total combined sheet thickness the rivet will correctly clamp — select a rivet whose grip range covers your stack. Drill the hole to the exact diameter shown; do not use a larger bit.
Both the In-Bolt (IB) and Out-Bolt (OB) use the same locking mandrel principle — but they differ in where the broken mandrel sits after installation. In the IB type the mandrel breaks and is retained inside the rivet body. In the OB type the mandrel breaks and the tail protrudes and locks on the outside of the rivet, forming a visible external lock. This external tail dramatically improves vibration resistance because the mandrel cannot rattle or work loose inside the barrel — it is mechanically pinned against the outside face of the substrate.
Mandrel retained inside the barrel
The mandrel breaks flush and is sealed inside the rivet body. This completely closes the rivet, preventing moisture from entering through the mandrel hole — ideal for outdoor and marine environments where corrosion protection is the top priority. The sealed barrel also prevents any mandrel rattle.
Best for: Outdoor panels · Coastal structures · Sealed enclosures
Mandrel tail locks on the outside face
The mandrel tail protrudes and clamps against the outer face of the substrate. This external mechanical lock gives the OB its exceptional vibration resistance — the mandrel is physically prevented from backing out by the substrate itself. The preferred choice wherever high-frequency vibration is the primary concern, such as truck chassis, vehicle body panels and container frames.
Best for: Truck bodies · Container frames · Automotive chassis · Construction steel
Drill a clean hole to the specified diameter (4.9–5.0 mm for 4.8 mm rivet, 6.5–6.6 mm for 6.4 mm). Insert the OB rivet through the hole from the accessible side. The flange head seats flat against the material surface.
Place the rivet gun nosepiece over the mandrel stem. The tool grips the mandrel ready to pull. Ensure the rivet flange is flush before squeezing — a cocked rivet will not set correctly.
Squeezing the tool pulls the mandrel, expanding the blind end of the rivet into a wide bearing flange that clamps the materials together. The pulling force is controlled — the rivet expands progressively across the full grip range.
At the break point the mandrel tail does not eject — it locks against the outside face of the substrate. This is the defining OB feature: the external tail pin prevents mandrel pullout or rattle under any vibration load. Installation is complete.
4.8 / 6.4
Diameters (mm)
Steel
Body Material
External
Mandrel Lock Type
15.9 mm
Max Grip Range
The In-Bolt (IB) retains the broken mandrel inside the rivet body, sealing the barrel completely — best for corrosion-sensitive applications. The Out-Bolt (OB) locks the mandrel tail against the outside face of the substrate, giving a stronger mechanical lock against vibration pullout — best for truck bodies, containers and construction where vibration is the primary concern.
The OB type is available in steel only. If you need stainless steel for a corrosive or outdoor environment, the Anlock In-Bolt (IB) is available in stainless steel and aluminium and should be considered instead.
Yes — that is the defining benefit of any blind rivet. You only need access to one side to install it. The OB rivet expands and locks entirely from the accessible side. However, ensure there is sufficient clearance behind the joint for the external mandrel tail to lock against the blind face.
A heavy-duty rivet gun with a 6.4 mm nosepiece is required. Standard lightweight rivet guns are rated for up to 4.8 mm. For 6.4 mm structural rivets we recommend a pneumatic or heavy-duty hand riveter. Contact us and we can advise on compatible riveters we stock.
Yes. Excel Trading Corporation stocks Anlock OB rivets at our Bengaluru store on Sadar Patrappa Road, Nagarathpete. We supply trade quantities to fabricators, manufacturers and contractors across Karnataka. Call +91-9448239476 or use the Enquire Now button to request a quote.
Home
About Us
Products
Contact Us
