The Wacker Neuson Necked Down Screw M12X400 is a genuine OEM component designed for the BH 24, BH 24 Low Vib, BH 24 Low Vib RS, BH 55rw, BH 65, EH 25, EH 65, EH 70, and EH 75 series breakers. As a direct factory replacement, this screw is produced to the exact material and dimensional tolerances Wacker Neuson specifies for these machines. Broad compatibility across both gasoline and electric breaker variants makes a practical stocking part for contractors and service technicians running Wacker Neuson breaker fleets.
Key Features
- Genuine OEM Thread and Shank Integrity — Manufactured to Wacker Neuson's exact M12X400 necked-down profile, ensuring correct torque transfer and clamping load within the breaker assembly.
- Drop-In Installation — Matches the original fastener geometry exactly, so the screw seats and threads without rework or modification to surrounding components.
- Wide Breaker Compatibility — Fits BH 24, BH 24 Low Vib, BH 24 Low Vib RS, BH 55rw, BH 65, EH 25, EH 65, EH 70, and EH 75 series machines across petrol and electric variants.
- Structural Fastener Reliability — A correctly spec'd necked-down screw maintains proper joint preload under the sustained vibration loads that demolition breakers generate; a worn or wrong-size fastener risks loosening and internal component movement.
- Verified by Part Number — Cross-reference 5000201958 against your machine's serial number and model designation before ordering to confirm an exact match.
A necked-down screw is a fastener whose shank is intentionally reduced in diameter between the head and the threaded section. This controlled reduction allows the shank to flex slightly under dynamic loading — an important characteristic in high-vibration equipment such as demolition breakers, where rigid fasteners can fatigue and fracture under repeated impact cycles. By absorbing and distributing cyclic stress along the reduced shank rather than concentrating it at the thread roots, the necked-down design helps the joint stay secure through demanding work. When this screw wears, stretches beyond its elastic range, or is replaced with a standard fastener of the wrong profile, the breaker's internal assembly can lose clamping integrity, leading to accelerated wear of surrounding components.
Part Details
| Part Number | 5000201958 |
|---|---|
| Old Part Number | 0201958 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Necked Down Screw M12X400 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BH24-BREAKER, 27x80mm round | BH 24 | 5000008937, 5000008993, 5000008994, 5000610293, 5000008992, 5000610342, 5000610382, 5000610383, 5000610384, 5000610385, 5000610386 |
| Petr. Breaker BH24LowV.EE27x80 | BH 24 Low Vib | 5000008995, 5000610082, 5000610083, 5000610081, 5000610343, 5000610388, 5000610389, 5000610390, 5000610391, 5000610392 |
| Gasoline Breaker | BH 24 Low Vib RS | 5000008996, 5000610393 |
| BH 65, 27x80 | BH 65 27x80 | 5100004032 |
| BH 65, hex 25x108 | BH 65 25x108 | 5100004033 |
| BH 65, hex 28x152 | BH 65 28x152 | 5100004034 |
| BH65 28x160 | BH 65 28x160 | 5100004035 |
| BH65 32x160 | BH 65 32x160 | 5100004036 |
| BH55rw 27x80 | BH 55rw 27x80 | 5100004038 |
| BH55rw 25x108 | BH 55rw 25x108 | 5100004039 |
| BH 55rw 28x152 | BH 55rw 28x152 | 5100004040 |
| BH55rw 28x160 | BH 55rw 28x160 | 5100004041 |
| BH55rw 32x160 | BH 55rw 32x160 | 5100004042 |
| BH55RW RS 27x80 | BH 55rw rs 27x80 | 5100004043 |
| BH65 Gasoline Breaker | BH 65 | 5000610387 |
| BH65 Gasoline Breaker | BH 65 28x152 US | 5100004037 |
| BH65 28x160 | BH65 28x160 | 5100047068, 5100051587 |
| BH65 32x160 | BH65 32x160 | 5100047069 |
| BH55rw 27x80 | BH55rw 27x80 | 5100047100 |
| BH55rw 28x160 | BH55rw 28x160 | 5100047101 |
| BH55rw 32x160 | BH55rw 32x160 | 5100047102 |
| BH55rw rs 27x80 | BH55rw rs 27x80 | 5100047103 |
| BH65 27X80 | BH65 27x80 | 5100047106 |
| BH65 25x108 | BH65 25x108 | 5100047107 |
| EH75/240V Electric Breaker | EH 75/240V | 5000610294 |
| EH25/240 BREAKER | EH 25/230V | 5000610330, 5000610395, 5000610396, 5000610397, 5000610404 |
| EH65 BREAKER | EH 65/120V | 5000610421 |
| Electric Breaker EH 25/115V | EH 25/115V | 5100001903 |
| EH 75, 27x80 | EH 75/230 27x80 | 5100004152 |
| EH 75, hex 25x108 | EH 75/230 25x108 | 5100004153 |
| EH 75, hex 28x160 | EH 75/230 28x160 | 5100004154 |
| EH 75, hex 28x152 | EH 75/230 28x152 | 5100004155 |
| EH 75, hex 32x160 | EH 75/230 32x160 | 5100004156 |
| EH75/240 Electric Breaker | EH 75/240 28x152 US | 5100004157 |
| EH70 32x160 | EH 70/115 32x160 UK | 5100004158 |
| EH70/120 Electric Breaker | EH 70/120 28x152 US | 5100004159 |
| Electric Hammer | EH 75/230 28x160 BR | 5100009762 |
| Petrol Breaker | BH55rw 27x80 SEA | 5100026904 |
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.
