How long are the screws in J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block?

The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.

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 J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block?

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 J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block?

TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.

J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block screw size

M3 · 6 mm long

Our records put J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block on M3 screws, 6 mm long.

The record covers guide explicitly specifies 'M3 Screw — 0.5 Nm... IEC 60999-1 Standard' used in 5.0mm/5.08mm pitch terminal blocks common in control panels (bakery mixer, car wash, EV kiosk control boards).

This entry is marked confirmed and comes from nbjge.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.

J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block screw specifications

One row per fitment record. Head, drive and torque are shown only where the source states them; pitch is the ISO coarse pitch for the thread.

Thread	Length	Pitch	Head	Drive	Torque	Where it goes	Status
M3	6 mm	0.5 mm	not stated	not stated	0.5 Nm	Guide explicitly specifies 'M3 Screw — 0.5 Nm... IEC 60999-1 Standard' used in 5.0mm/5.08mm pitch terminal blocks common in control panels (bakery mixer, car wash, EV kiosk control boards)	Confirmed

Fitment records and sources

M3M3x6confirmed

Guide explicitly specifies 'M3 Screw — 0.5 Nm... IEC 60999-1 Standard' used in 5.0mm/5.08mm pitch terminal blocks common in control panels (bakery mixer, car wash, EV kiosk control boards)

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

Source

How to check the screw before you buy

Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
The record states 6 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 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.

Common mix-ups with M3

Terminal-block clamp screws have manufacturer-specific torque values — over-tightening cracks the block or crushes the wire.
DIN-rail terminal blocks are near-universally M3 across Dinkle, TE, Omron and RND, but torque differs (0.5-0.8 Nm) — over-torquing an M3 terminal screw strips it instantly.

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 J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block, closest length match first.

2.5in SATA / SAS hard drives and SSDs (SFF-8201) also M3 × 6 mm
Canford D-series BNC panel connector (broadcast/RF) also M3 × 6 mm
Eurorack module panel mounting also M3 × 6 mm
Metcase Technomet-Control instrument enclosure also M3 × 6 mm
Eurorack modular synthesizer cases also M3 × 6 mm
PEM self-clinching flush-head stud, sheet-metal enclosures (ATM/kiosk/POS chassis use case) also M3 × 6 mm
Omron E3T ultracompact photoelectric sensor (used for conveyor/AGV object detection) also M3 × 6 mm
UniFi switch / access point wall bracket also M3 × 6 mm

Questions about J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block screws

What size screw does J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block use?: M3 × 6 mm for guide explicitly specifies 'M3 Screw — 0.5 Nm... IEC 60999-1 Standard' used in 5.0mm/5.08mm pitch terminal blocks common in control panels (bakery mixer, car wash, EV kiosk control boards).
How long are the screws in J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block?: The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
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 J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block?: 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.
How tight should the M3 screw on J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block be?: The source gives 0.5 Nm for guide explicitly specifies 'M3 Screw — 0.5 Nm... IEC 60999-1 Standard' used in 5.0mm/5.08mm pitch terminal blocks common in control panels (bakery mixer, car wash, EV kiosk control boards).
Where can I buy replacement screws for J-GUANG 301R / 2EDGK-5.0 & 5.08 PCB screw terminal block?: TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.

Heads up: shipping delay