The Wacker Neuson Washer B4.3 Ms Flat is a genuine OEM component designed for the AR external vibrator and IRSEN and IRSE-FU internal vibrator series. As a direct OEM part, the is manufactured to Wacker Neuson's exact material and dimensional specifications, ensuring a correct, consistent fit across the wide range of compatible concrete vibrator models. This washer is confirmed for use across AR 36, AR 54, AR 75, ARFU 36, IRSEN 30 through 65k, and IRSE-FU 30 through 57 series units in various voltage configurations. Keeping the correct hardware in place protects fastener integrity and helps maintain proper clamping force in the vibrator assembly.
Key Features
- Correct Material Grade for Vibrator Hardware: — Manufactured in Ms (brass) to match the original specification, providing the correct hardness and corrosion resistance for concrete vibrator applications.
- Drop-In Hardware Replacement: — Matches the original B4.3 bore and flat profile, seating correctly against fastener heads and mating surfaces without rework or modification.
- Broad Vibrator Series Coverage: — Fits AR external vibrators and IRSEN and IRSE-FU internal vibrators across 30 through 75 series models, including 115 V, 230 V, 400 V, and 460 V configurations.
- Maintains Proper Clamping Force: — A correctly sized and seated washer distributes fastener load evenly, preventing loosening under the continuous vibration cycles these units produce.
- Genuine OEM Confidence: — Sourced directly from Wacker Neuson, part 5000012642 carries the same quality control and traceability as every other OEM component in the vibrator lineup.
A flat washer in a concrete vibrator assembly serves to distribute the clamping load of a fastener across a wider surface area, preventing the fastener head or nut from pulling through or deforming the mating component over time. In high-frequency vibration equipment like the AR and IRSEN series, hardware is subjected to constant cyclic stress, which accelerates wear on undersized or incorrect washers. When the wrong washer is used or the original wears or deforms, fasteners can work loose during operation, leading to component misalignment or accelerated wear on surrounding parts.
Part Details
| Part Number | 5000012642 |
|---|---|
| Old Part Number | 0012642 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Washer B4.3 Ms Flat |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| External Vib. ARFU 36/6/230 | ARFU 36/6/230 | 5000610000 |
| External Vib. AR 75/3/230/400 | AR 75/3/230/400 | 5000007898 |
| External Vibrator, 3600 rpm, 4 60V | AR 75/3,6/460 US | 5000007889 |
| External Vib. AR 75/3/200/400 | AR 75/3/200/400 | 5000007900 |
| Ext. Vib. AR 75/3,6/318/550 | AR 75/3,6/318/550 | 5000007943 |
| Internal Vib. IRSEN 57/115 | IRSEN 57/115 | 5000008599 |
| Internal Vib. IRSEN 57k/115 | IRSEN 57k/115 | 5000008600 |
| Int. Vib. IRSEN 57/115 Laser | IRSEN 57/115 Laser | 5000008646 |
| Int. Vib. IRSEN 57k/115 Laser | IRSEN 57k/115 Laser | 5000008647 |
| Internal Vib. IRSEN 57/250 | IRSEN 57/250 | 5000008651 |
| Internal Vib. IRSEN 57k/250 | IRSEN 57k/250 | 5000008652 |
| Internal Vib. IRSEN 57/250 GV | IRSEN 57/250 GV | 5000008656 |
| Internal Vib. IRSEN 57k/250 GV | IRSEN 57k/250 GV | 5000008657 |
| Int.Vib. IRSEN-FU 57/230 | IRSEN-FU 57/230 | 5000008725 |
| Int.Vib. IRSEN-FU 57/230 Laser | IRSEN-FU 57/230 Laser | 5000008728 |
| IRSEN-FU 115V 60HZ 57 | IRSEN-FU 57/115 | 5000008923 |
| ARFU 36/6/115/US EXT. VIBRATOR | ARFU 36/6/115 | 5000610002, 5000610003 |
| Ext. Vib. AR 75/3,6/230/400 | AR 75/3,6/230/400 | 5000007899 |
| External Vibrator, 3600 rpm, 4 40V | AR 75/3,6/220/440 | 5000007951 |
| External Vib. AR 75/1,5/500 | AR 75/1,5/500 | 5000008589 |
| Internal Vib. IRSEN 45/115 | IRSEN 45/115 | 5000008601 |
| Internal Vib. IRSEN 38/115 | IRSEN 38/115 | 5000008602 |
| IRSEN45/115Laser | IRSEN45/115Laser | 5000008648 |
| Int. Vib. IRSEN 38/115 Laser | IRSEN 38/115 Laser | 5000008649 |
| Internal Vib. IRSEN 45/250 | IRSEN 45/250 | 5000008653 |
| Internal Vib. IRSEN 38/250 | IRSEN 38/250 | 5000008654 |
| Internal Vib. IRSEN 45/250 GV | IRSEN 45/250 GV | 5000008658 |
| Internal Vib. IRSEN 38/250 GV | IRSEN 38/250 GV | 5000008659 |
| Int. Vib. IRSEN-FU 45/230 | IRSEN-FU 45/230 | 5000008726 |
| Int.Vib. IRSEN-FU 38/230 | IRSEN-FU 38/230 | 5000008727 |
| Int.Vib. IRSEN-FU 45/230 Laser | IRSEN-FU 45/230 Laser | 5000008729 |
| Int.Vib. IRSEN-FU 38/230 Laser | IRSEN-FU 38/230 Laser | 5000008730 |
| Int. Vib. IRSEN-FU 38/115 WGB | IRSEN-FU 38/115 WGB | 5000008921 |
| Int. Vib. IRSEN-FU 45/115 WGB | IRSEN-FU 45/115 WGB | 5000008922 |
| AR 54/3.6/460 EXTERNAL VIBRATR | AR 54/3,6/460 US | 5000007812 |
| External vibrator AR 75/3/240 | AR 75/3/240/415 | 5000007897 |
| AR36/6/042 EXTERNAL VIBRATOR | AR 36/6/042 | 5000008933, 5000008965, 5000008986 |
| External Vib. AR 36/12/042 | AR 36/12/042 | 5000008961 |
| External Vib. AR 36/6/042LBV | AR 36/6/042 LBV | 5000008962 |
| External Vib. AR 36/6/115 | AR 36/6/115 | 5000008963 |
| AR36/3.6/115W EXT. VIBRATOR | AR 36/3,6/115 W US | 5000008964 |
| External Vib. AR 36/3/230 W | AR 36/3/230 W | 5000008967 |
| AR36/3.6/240W-EXT.VIBRATOR | AR 36/3,6/240 W | 5000008968 |
| Ext. Vib. AR 36/3/230 Vario | AR 36/3/230 Vario | 5000008969 |
| External Vib. AR 36/3/240W | AR 36/3/240 W | 5000008970 |
| External Vib. AR 36/6/250 | AR 36/6/250 | 5000008971 |
| External Vib. AR 36/3/400 | AR 36/3/400 | 5000008973 |
| External Vib. AR 36/3,6/400 | AR 36/3,6/400 | 5000008974 |
| External Vib. AR 36/3,6/440 | AR 36/3,6/440 | 5000008976 |
| External Vib. AR 36/3,6/460 | AR 36/3,6/460 | 5000008977 |
| External Vib. AR 36/3,6/480 | AR 36/3,6/480 | 5000008978 |
| External Vib. AR 36/3/500 | AR 36/3/500 | 5000008979 |
| External Vib. AR 26/3/230W | AR 26/3/230 W | 5000008981 |
| External Vib. AR 26/3/400 | AR 26/3/400 | 5000008982 |
| IRSEN FU57,115/60HZ,1 METER | IRSEN-FU 57/115 WC | 5000610153 |
| IRSEN FU45,115/60HZ,1 METER | IRSEN-FU 45/115 WC | 5000610154 |
| IRSEN FU38,115/60HZ,1 METER | IRSEN-FU 38/115 WC | 5000610155 |
| AR 43/3/230 v | AR 43/3/230 v | 5100004246 |
| AR 43/3/400 | AR 43/3/400 | 5100004247 |
| AR 43/6/042 | AR 43/6/042 | 5100004248 |
| AR 43/6/250 | AR 43/6/250 | 5100004249 |
| External Vibrator, 3000 rpm, 4 00V | AR 3/2 | 5000006119 |
| External Vibrator AR 3/2 W | AR 3/2 W | 5000006120 |
| AR3/2 460V,3 EXTERNAL VIBRATOR | AR 3/2 S | 5000006348, 5000006351, 5000006423, 5000006435, 5000006479, 5000006493, 5000006662, 5000006708, 5000006830, 5000006950, 5000007296, 5000007769, 5000007784 |
| External Vibrator AR 3/2 W/S | AR 3/2 W/S | 5000006366, 5000006429, 5000006430, 5000006436, 5000006494 |
| External Vib. AR 51/3,6/440 | AR 51/3,6/440 | 5000007017 |
| Converter FU 1,6/200 SW | FU 1,6/200 SW | 5000007089 |
| Converter FU 1,6/250/200 SW | FU 1,6/250/200 SW | 5000007095 |
| Converter FU 1,6/115/200 W-SW | FU 1,6/115/200 W-SW | 5000007273 |
| Converter | FU 1,6/200 SW-S | 5000007287, 5000007303, 5000007977 |
| Converter FU 1,6/200 W-SW | FU 1,6/200 W-SW | 5000007787 |
| Internal vib. IRSEN 65k/250 | IRSEN 65k/250 | 5000008650 |
| Internal vib. IRSEN 65k/250 GV | IRSEN 65k/250 GV | 5000008655 |
| External Vibrator, 3.6/460 V | AR 52/3,6/460 US | 5000008956 |
| External Vibrator 230/460 V | AR 3/2 460V 60Hz | 5000008960 |
| Internal Vib. IRSEN 30/250 | IRSEN 30/250 | 5000610071 |
| Internal Vib. IRSEN 30/250 GV | IRSEN 30/250 GV | 5000610072 |
| AR36/3.6/240W-EXT.VIBRATOR | AR 36/3,6/230 | 5000610225 |
| Int. Vib. w. Conv. IRSE-FU 38/230 | IRSE-FU 38/230 | 5000610249 |
| Int. Vib. w. Conv. IRSE-FU 38/230 Laser | IRSE-FU 38/230 Laser | 5000610250 |
| Int. Vib. w. Conv. IRSE-FU 38/120 GB | IRSE-FU 38/120 GB | 5000610251 |
| IRSEFU 38 | IRSE-FU 38/120 US | 5000610252 |
| IRSE-FU45/230 | IRSE-FU45/230 | 5000610256 |
| IRSE-FU 45/230/03 | IRSE-FU45/230 Laser | 5000610257 |
| Int. Vib. w. Conv. IRSE-FU 45/120 GB | IRSE-FU 45/120 GB | 5000610258 |
| IRSEFU 45 | IRSE-FU 45/120 US | 5000610261 |
| IRSE-FU58/230 | IRSE-FU58/230 | 5000610267 |
| IRSE-FU 57/230/03 | IRSE-FU 57/230 Laser | 5000610268 |
| Int. Vib. w. Conv. IRSE-FU 57/120 GB | IRSE-FU 57/120 GB | 5000610271 |
| IRSEFU 57 | IRSE-FU 57/120 US | 5000610275 |
| Int. Vib. w. Conv. IRSE-FU 30/230 | IRSE-FU 30/230 | 5000610280 |
| Int. Vib. w. Conv. IRSE-FU 30/230 Laser | IRSE-FU 30/230 Laser | 5000610281 |
| Int. Vib. w. Conv. IRSE-FU 30/120 GB | IRSE-FU 30/120 GB | 5000610282 |
| IRSEFU 30 | IRSE-FU 30/120 US | 5000610283 |
| External Vibrator AR36/6/41,5 US | AR 36/6/41,5 US | 5000610373 |
| External Vib. AR36/6/41,5 S3,5 US | AR 36/6/41,5 S3,5 US | 5000610374 |
| External Vib. AR36/6/41,5 LBV US | AR 36/6/41,5 LBV US | 5000610375 |
| External Vib. AR36/6/41,5 CS US | AR 36/6/41,5 CS US | 5000610376 |
| External Vibrator AR 34/3,6/230 | AR 34/3,6/230 | 5100002762 |
| External Vibrator AR 34/3,6/460 | AR 34/3,6/460 | 5100002822 |
| External Vibrator AR 34/6/115 | AR 34/6/115 | 5100002825 |
| External Vibrator AR 34/3/500 | AR 34/3/500 | 5100002829 |
| External vibrator AR 26/3,6/120 w | AR 26/3,6/120 w | 5100003962 |
| External vibrator AR 64/3/200/400 | AR 64/3/200/400 | 5100004194 |
| External vibrator AR 61/3/200/400 | AR 61/3/200/400 | 5100004208 |
| External vibrator AR 64/3,6/460 | AR 64/3,6/460 | 5100004212 |
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.
