Black Oxide Torx Flanged Button Head Self-Tapping Screws with Blue Nylon Patch

Product Description:

These are Black Oxide Torx Flanged Button Head Self-Tapping Screws with Blue Nylon Patch from Qimao Metal Manufacture, you see on the threads. The patch isn’t cosmetic—it’s a mechanical locking mechanism. When you drive the screw in, that nylon compresses against the mating threads and creates what we call prevailing torque. It resists vibration better than you’d expect from something that looks so simple.

The flange under the head, it’s wider than a standard pan head, which helps distribute clamp load. That matters when you’re fastening into plastic or thin sheet metal—without it, you’d see surface cracking or the head pulling through over time.

Torx drive geometry gives you full contact with the driver bit. No cam-out, no stripped heads halfway through a production run. The black oxide isn’t just for appearance either—it adds a bit of lubricity during thread forming, which keeps driving torque consistent.

Specification:

 

Product Name:	Item No.:	Material:	Measurement(mm):			Surface Finish:	Weight(g):
			L:	W:	Dia:
Black Oxide Torx Flanged Button Head Self-Tapping Screws with Blue Nylon Patch	QM1105	Steel	30.25	/	D1:18.6 D2:14.92Inner	Black Oxide	20.55

Products Details:

 The Black Oxide Torx Flanged Button Head Self-Tapping Screws with Blue Nylon Patch we offer, standard bit sizing applies—T10 for M3, T15 for M4, T20 for M5 and up. The full flank contact design means torque transmits consistently, and bit wear stays minimal even after extended production runs.

The head is flanged button style. Flange diameter runs 18.6mm, with the head itself measuring 14.92mm across. That gives you a bearing surface that spreads clamp load evenly and avoids localized stress points—especially useful when fastening into plastics or softer materials. Under the head you’ll find serrations as standard; they bite into the mating surface at seating and help resist vibration.

Thread length is 10.95mm, with root diameter at 10.35mm. The self-tapping geometry displaces material rather than cutting it, so no chips generate during installation. Works well in plastics and light alloys.

Surface gets a black oxide finish with light oil coating. Gives moderate corrosion protection and improves lubricity when the thread forms.

Nylon patch is blue, factory-applied. Standard position is 1.5 to 2 threads back from the tip; we can adjust that if your application needs it.

Overall length runs 30.25mm. Weight comes in at approximately 20.5 grams per piece. Custom specifications available upon request.

Product Feature:

• Black Oxide Torx Flanged Button Head Self-Tapping Screws with Blue Nylon Patch drive stays seated once engaged. Cuts driver bit replacement by about 40% compared to Phillips on production lines.

• Blue nylon patch isn’t glue. No curing, no drying, no waiting. Locks immediately upon driving.

• Flanged head eliminates separate washers. One less part to source, one less failure point in vibration-prone assemblies.

• Thread-forming geometry displaces material rather than cutting it. Delivers better engagement and higher pull-out resistance in plastics.

• Black oxide finish offers decent indoor corrosion protection. Works well for electronics and automotive interior applications.

• Reusable 5 to 10 times before the patch loses effectiveness. Ideal for maintenance access and prototyping work.

Product Application:

• The Black Oxide Torx Flanged Button Head Self-Tapping Screws with Blue Nylon Patch used for Dashboard assemblies and interior trim in vehicles

• Enclosures for consumer electronics and industrial control panels

• 3D-printed parts and prototypes—we’ve got quite a few customers in that space

• Plastic housings for appliances, power tools, and HVAC equipment

• Medical device assemblies that can’t use liquid threadlockers (no residue, no contamination risk)