What size screw does Nerf blaster thumbscrews (mid sizes) use?

M3 × 8–30 mm for M3 x 8mm through M3 x 30mm tapered and square thumbscrews.

How long are the screws in Nerf blaster thumbscrews (mid sizes)?

The records range from 8 to 30 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M3 screw?

0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.

What screwdriver do I need for Nerf blaster thumbscrews (mid sizes)?

The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.

Can I use an imperial screw instead of M3?

No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Nerf blaster thumbscrews (mid sizes)?

TechSpareWarehouse (our own store) lists M3 x 8mm, M3 x 10mm and M3 x 12mm, which match lengths in the records above.

Nerf blaster thumbscrews (mid sizes) screw size

M3 · 8 to 30 mm long

The screws used on Nerf blaster thumbscrews (mid sizes) are M3 in lengths from 8 to 30 mm.

The record covers M3 x 8mm through M3 x 30mm tapered and square thumbscrews.

Head and drive, as the source states them: thumb screw (knurled) head.

This entry is marked confirmed and comes from outofdarts.com.

M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

Nerf blaster thumbscrews (mid sizes) 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
M3	8–30 mm	0.5 mm	Thumb screw (knurled)	not stated	M3 x 8mm through M3 x 30mm tapered and square thumbscrews	Confirmed

Fitment records and sources

M38-30mmconfirmed

M3 x 8mm through M3 x 30mm tapered and square thumbscrews

pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10

Source

How to check the screw before you buy

Vibration loosens small screws on drones and RC models, so builders commonly add a drop of medium (blue) threadlocker on metal-to-metal joints — never on plastic.
Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.5 mm from one thread crest to the next (20 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
Length: for thumb screw (knurled) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
The records span 8–30 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M3

Telescope thumbscrews are sold in a wide non-metric legacy range too (1/4-20, 8-32, 10-32 on many Meade/Celestron mounts), so metric M3/M4 fitment applies mainly to newer/international accessory ecosystems (SkyWatcher, generic 1.25" accessories) and should not be assumed universal.
Museum/AV projector mounting kits typically bundle four to six thread sizes (M3–M6) in one bag to fit varied projector OEM patterns — always match the specific length/thread pair actually used for a given projector model rather than assuming all sizes apply universally.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with Nerf blaster thumbscrews (mid sizes), closest length match first.

1/10 scale RC cars also M3 × 8–12 mm
Waters Arc HPLC oven bracket screw also M3 × 10 mm
5-inch brushless motor to arm also M3 × 8 mm
E-flite Gee Bee R-2 wing fixing also M3 × 25 mm
REV Robotics T-slot extrusion screw (41-1907) also M3 × 8 mm
DJI Agras Agras T50/T25/T16/T20/T30 and FlyCart 30 airframe screw also M3 × 8 mm
Axial SCX10 III RC crawler, long links also M3 × 18 mm
TBS Source One V3 / HD FPV frame also M3 × 8–30 mm

Questions about Nerf blaster thumbscrews (mid sizes) screws

What size screw does Nerf blaster thumbscrews (mid sizes) use?: M3 × 8–30 mm for M3 x 8mm through M3 x 30mm tapered and square thumbscrews.
How long are the screws in Nerf blaster thumbscrews (mid sizes)?: The records range from 8 to 30 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M3 screw?: 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
What screwdriver do I need for Nerf blaster thumbscrews (mid sizes)?: The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
Can I use an imperial screw instead of M3?: No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Nerf blaster thumbscrews (mid sizes)?: TechSpareWarehouse (our own store) lists M3 x 8mm, M3 x 10mm and M3 x 12mm, which match lengths in the records above.

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