DeWalt D51430 / D51431 pneumatic nailer screw size
M4 · 16 mm long
If you are replacing a screw on DeWalt D51430 / D51431 pneumatic nailer, the thread is M4, 16 mm long.
It is listed for screw retaining the bushing at the nose.
This entry is marked confirmed and comes from media.toolpartspro.com.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
DeWalt D51430 / D51431 pneumatic nailer screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M4 | 16 mm | 0.7 mm | not stated | not stated | Screw retaining the bushing at the nose | Confirmed |
Fitment records and sources
Screw retaining the bushing at the nose
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Industrial parts lists usually give the full callout (thread, length, head, grade); match all four, not just the thread.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 16 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source does not name the drive. Standard M4 heads take PH2 for Phillips and T20 for Torx, and a 3 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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Devices whose records share a thread with DeWalt D51430 / D51431 pneumatic nailer, closest length match first.
- Circular saw blade guard pivot also M4 × 16 mm
- Bianchi / Nuova Simonelli / Rheavendors / Saeco vending machine also M4 × 16 mm
- Power tool battery pack shell also M4 × 16 mm
- Webstaurantstore 348SM80/348SM100 Spiral Mixer (bakery) electrical/guard switch mounting also M4 × 16 mm
- Rhea Vendors Luce Publico vending machine also M4 × 16 mm
- Pinball cabinet hardware (EU restorations) also M4 × 16 mm
- LG 55LV5400 also M4 × 16 mm
- Segway-Ninebot Grade 10.9 structural screw (part 10.01.3188.00) also M4 × 16 mm
Questions about DeWalt D51430 / D51431 pneumatic nailer screws
- What size screw does DeWalt D51430 / D51431 pneumatic nailer use?
- M4 × 16 mm for screw retaining the bushing at the nose.
- How long are the screws in DeWalt D51430 / D51431 pneumatic nailer?
- The record gives 16 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for DeWalt D51430 / D51431 pneumatic nailer?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.