Fits: New Holland BOOMER-40, New Holland BOOMER-45, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-30 + 10 more
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
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-41 | BOOMER |
| BOOMER-45 | BOOMER |
| BOOMER-35 | BOOMER |
| BOOMER-47 | BOOMER |
| BOOMER-30 | BOOMER |
| BOOMER-33 | BOOMER |
| BOOMER-37 | BOOMER |
| WORKMASTER-25 | WORKMASTER |
| WORKMASTER-33 | WORKMASTER |
| WORKMASTER-35 | WORKMASTER |
| WORKMASTER-37 | WORKMASTER |
| WORKMASTER-40 | WORKMASTER |
Showing the first 10 of 15 compatible models — type your model above to jump straight to it.
Not sure it fits? Browse the full parts catalogue to check every listed part.
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-45, New Holland BOOMER-50, New Holland BOOMER-55, New Holland BOOMER-30 + 10 more. Commonly ordered for the BOOMER-50, BOOMER-40, BOOMER-55. If your machine isn't listed, check the serial number before ordering.
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
local pickup same day
usually ships same day
Free shipping on parts orders $75+
To the 48 contiguous states, with a CROP account.
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 lbs | 3,549 lbs | 3,424–4,194 lbs | 3,424–3,490 lbs | 3,424–4,194 lbs | 2,913 lbs |
| Rear PTO | independent | independent | independent | independent | independent | independent |
| 3-pt hitch | I | I | I · 2,116 lbs lift | I · 2,116 lbs lift | I · 2,116 lbs lift | I |
| Fuel capacity | — | — | — | 10.5 gal | — | — |
| Rear tires | — | — | 13.6-24 | 13.6-24 | 13.6-24 | — |
Questions
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.
Reviews
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