Fits: New Holland BOOMER-40, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-45, New Holland BOOMER-41 + 10 more
usually ships same day
usually ships same day
Overview
Built for the New Holland BOOMER-50 and BOOMER-40, this bolt secures the assembly to spec torque. Cataloged for 15 New Holland models across 2 series.
Specifications
Compatibility
Type your model to confirm it fits — or browse the full compatibility list below.
| Model | Series |
|---|---|
| BOOMER-50 | BOOMER |
| BOOMER-40 | BOOMER |
| BOOMER-55 | BOOMER |
| BOOMER-55 | BOOMER |
| BOOMER-41 | BOOMER |
| BOOMER-45 | BOOMER |
| BOOMER-45 | BOOMER |
| BOOMER-50 | BOOMER |
| BOOMER-50 | BOOMER |
| BOOMER-40 | BOOMER |
| BOOMER-35 | BOOMER |
| BOOMER-40 | BOOMER |
| BOOMER-41 | BOOMER |
| BOOMER-47 | BOOMER |
| BOOMER-47 | BOOMER |
| BOOMER-30 | BOOMER |
| BOOMER-33 | BOOMER |
| BOOMER-35 | BOOMER |
| BOOMER-37 | BOOMER |
| BOOMER-37 | BOOMER |
| WORKMASTER-25 | WORKMASTER |
| WORKMASTER-33 | WORKMASTER |
| WORKMASTER-35 | WORKMASTER |
| WORKMASTER-35 | WORKMASTER |
| WORKMASTER-37 | WORKMASTER |
| WORKMASTER-40 | WORKMASTER |
| WORKMASTER-40 | WORKMASTER |
Showing the first 10 of 27 compatible models — type your model above to jump straight to it.
Not sure it fits? Search by serial number for an exact, machine-specific match.
Parts diagrams
Every diagram this part appears in — jump straight to its callout, or browse the whole assembly. Each diagram opens with every part numbered, and each callout links back to its own part page.
| Assembly | Machine | Callout | Parts | View |
|---|---|---|---|---|
 | New Holland WORKMASTER-35 · Front Axle System | #18 | 31 | View |
 | New Holland BOOMER-45 · Front Axle System | #21 | 34 | View |
 | New Holland BOOMER-40 · Front Axle System | #21 | 31 | View |
 | New Holland BOOMER-40 · Front Axle System | #21 | 33 | View |
 | New Holland BOOMER-55 · Front Axle System | #21 | 33 | View |
 | New Holland BOOMER-55 · Front Axle System | #21 | 33 | View |
 | New Holland WORKMASTER-25 · Front Axle System | #18 | 29 | View |
 | New Holland BOOMER-35 · Front Axle System | #18 | 30 | View |
 | New Holland BOOMER-40 · Front Axle System | #18 | 30 | View |
 | New Holland BOOMER-41 · Front Axle System | #21 | 34 | View |
 | New Holland BOOMER-40 · Front Axle System | #21 | 35 | View |
 | New Holland BOOMER-50 · Front Axle System | #21 | 34 | View |
 | New Holland BOOMER-41 · Front Axle System | #21 | 33 | View |
 | New Holland BOOMER-50 · Front Axle System | #21 | 35 | View |
 | New Holland BOOMER-55 · Front Axle System | #21 | 34 | View |
 | New Holland BOOMER-45 · Front Axle System | #21 | 33 | View |
 | New Holland BOOMER-45 · Front Axle System | #6 | 26 | View |
 | New Holland BOOMER-45 · Front Axle System | #6 | 26 | View |
 | New Holland BOOMER-35 · Front Axle System | #18 | 30 | View |
 | New Holland BOOMER-55 · Front Axle System | #6 | 26 | View |
 | New Holland BOOMER-55 · Front Axle System | #6 | 26 | View |
 | New Holland BOOMER-40 · Front Axle System | #6 | 26 | View |
 | New Holland BOOMER-40 · Front Axle System | #6 | 26 | View |
 | New Holland BOOMER-40 · Front Axle System | #21 | 34 | View |
 | New Holland BOOMER-40 · Front Axle System | #21 | 31 | View |
 | New Holland BOOMER-33 · Front Axle System | #18 | 31 | View |
 | New Holland BOOMER-41 · Front Axle System | #21 | 33 | View |
 | New Holland WORKMASTER-33 · Front Axle System | #18 | 30 | View |
 | New Holland BOOMER-41 · Front Axle System | #21 | 36 | View |
 | New Holland BOOMER-30 · Front Axle System | #18 | 31 | View |
Part guide
New Holland MT40009921 is the bolt Clinton Tractor supplies for this application. It is listed as fitting 15 New Holland models.
Fits: New Holland BOOMER-40, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-45, New Holland BOOMER-41 + 10 more. Commonly ordered for the BOOMER-50, BOOMER-40, BOOMER-55. If your machine isn't listed, check the serial number before ordering.
Machine specifications
Verified equipment data for the models in the compatibility list — match yours before ordering.
| Specification | New Holland BOOMER-50 | New Holland BOOMER-40 | New Holland BOOMER-55 | New Holland BOOMER-41 | New Holland BOOMER-45 | New Holland BOOMER-35 |
|---|---|---|---|---|---|---|
| Weight | 3,549 lbs1609 kg lbs | 3,549 lbs1609 kg lbs | 3424 to 4194 pounds lbs | 3424 to 3490 pounds lbs | 3424 to 4194 pounds lbs | 2,913 lbs1321 kg lbs |
| Rear PTO | independent | independent | independent | independent | independent | independent |
| 3-pt hitch | I | I | I · 2116 lbs959 kg lbs lift | I · 2116 lbs959 kg lbs lift | I · 2116 lbs959 kg lbs lift | I |
| Fuel capacity | — | — | — | 10.5 gal39.7 L gal | — | — |
| Rear tires | — | — | 13.6-24 | 13.6-24 | 13.6-24 | — |
Watch
Install, fitment & service walkthroughs for this part.
3:46
19:40
5:33
6:03Questions
Quick answers to what operators ask most before they order this part.
It fits 15 New Holland models, including the BOOMER-50, BOOMER-40, BOOMER-55 and 12 more.
Yes — MT40009921 is a genuine New Holland OEM bolt, supplied new by Clinton Tractor.
Match your model and serial number against the fitment list on this page — it covers the New Holland BOOMER-50 — or send your serial to Clinton Tractor and we'll confirm MT40009921.
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