What You’re Getting
A socket head cap with an integrated flange builds the washer right under the head, so you get better load distribution, improved seating on softer materials, and less risk of bolt head pull-through. The internal hex drive keeps profiles compact for tight assemblies, while the flange stabilizes the joint during torque.
Choose our socket head cap with flange for assemblies that benefit from fewer loose parts, stable torque, and clean, compact hardware. Typical wins include motor mounts, gearboxes, pump bases, rail systems, fixturing plates, guards, and any retrofit where removing separate washers saves time and cost without sacrificing joint integrity.
If you’re standardizing across a project, pair this with our classic Socket Head Cap Screw for non-flanged locations, or choose our Button Head With Flange where a lower, more rounded profile is preferred.
Serrated Flange for Vibration Control (BN 3873)
When vibration is the enemy, our BN 3873 style is the answer. These screws marry a hex socket head to a serrated flange that bites into the mating surface to resist back-off. The result is consistent clamp load over time, fewer re-torques on the line, and extra insurance in assemblies that see shock, cycling, or thermal movement. Ideal for power transmission housings, pump frames, fixtures, and anywhere you’d normally reach for thread-lockers.
High-Tensile Flange Cap for Maximum Grip (BN 1392)
For applications that demand high tensile strength and a rock-steady seat, our BN 1392 style delivers. You get the familiar cylindrical socket head for high tool engagement plus an integrated smooth flange for broader load spread. Use this when you want the strength of a premium socket cap with the added stability of a built-in washer, from precision jigs and frames to automation plates and heavy equipment panels.
FAQs
What is the strongest socket head cap screw?
In general, the strongest off-the-shelf socket head cap screws are made from high-tensile alloy steel (often specified as ISO 12.9 metric or ASTM A574 inch), offering very high tensile strength. Stainless and lower-grade carbon steels trade some ultimate strength for corrosion resistance or cost.
Are socket head cap screws stronger than grade 8?
Typically yes when you’re comparing alloy-steel socket head cap screws (such as ASTM A574 / ISO 12.9) to SAE Grade 8 hex bolts. The alloy-steel socket caps usually have a higher minimum tensile strength. Always confirm by checking the exact material spec and size for your application.
What is the purpose of a flange?
The flange acts like a built-in washer. It spreads the clamping force over a wider area, helps protect the mating surface, improves seating, and in serrated versions adds extra resistance to loosening under vibration.
Do socket head cap screws need washers?
With a flanged head, separate washers are often unnecessary because the flange already distributes load. You might still use a washer or shim on soft materials, coated surfaces, or when you need to preserve a finish. For non-flanged socket caps, a washer is commonly recommended to protect the joint and improve load spread.
