Bomag 78320212 Bolt Stud

The Bomag 78320212 Bolt Stud is a genuine OEM fastener designed for a wide range of Bomag tandem rollers, walk-behind rollers, and cold milling machines. As a direct OEM replacement, this bolt stud meets Bomag's original design and material specifications, ensuring a secure, correctly torqued connection wherever it is installed. This part fits an extensive lineup of BW tandem rollers — including the BW 80 AD-2, BW 100 AD-5, BW 120 AD-5, BW 138 AD-5, BW 161 AD-5, and BW 174 AP-5, among many others — as well as BW 900-2 and BW 900-50 walk-behind rollers and BM-series cold milling machines including the BM 1000/35, BM 1200/35, and BM 1300/35. When fastener integrity matters, sourcing part number 78320212 directly ensures the correct thread form, shank diameter, and grade are in place.

Key Features

• Genuine OEM Material Grade — manufactured to Bomag's original tensile and thread specifications, so the bolt stud holds correct clamp load under the vibration and dynamic loads typical of compaction and milling equipment
• Drop-In Replacement — matches the original thread pitch, shank length, and seating geometry for straightforward installation without re-tapping or modification
• Broad Bomag Fitment — confirmed for BW-series tandem rollers from the BW 80 through BW 174 families, BW 900-series walk-behind rollers, and BM 500/15-2 through BM 1300/35 cold milling machines, covering multiple machine generations
• Structural Connection Integrity — a correctly spec'd bolt stud maintains the clamping force that keeps housings, covers, and structural assemblies seated; a worn, stretched, or incorrect fastener risks joint movement, fretting, and accelerated component damage
• Torque Retention Under Vibration — the OEM thread form and shank grade are selected specifically for the high-cycle vibration environment of vibratory rollers and milling drums, where undertorqued or mismatched fasteners back out prematurely

A bolt stud serves as a fixed threaded anchor point in an assembly, providing a consistent location for nuts or flanged components to clamp against without rotating the fastener itself during installation. Unlike a standard hex-head bolt, a stud remains stationary in its parent bore, which protects thread engagement in housings that may be softer than the bolt material and allows repeatable, accurate torque application to the nut end. When a stud is cross-threaded, stretched beyond yield, or corroded beyond serviceability, clamp load is compromised — leading to joint separation, gasket failure, or structural looseness that can cause secondary damage to the surrounding assembly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.