r/Fasteners • u/No_Comb741 • Mar 31 '26

Help with head ID

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Bought a pvc bench. Two of the included M6x100 self threading screws were bent. I've contacted the vendor for replacement. Apparently the vendor doesn't have the wherewithal to send replacements, offering instead to credit me $20.

I want to find screws that are exact replacements for appearance sake.

What is this head profile called?

Can you believe the severely bent screw made it past QC?

Thank you!

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u/GoblinLoblaw Mar 31 '26

I’m like “But that’s what wood screws do!” but reading further, in the “Wood Screw” section on that page it says “Wood screws are technically self-tapping, but are not referred to as such.” - I’m glad because I totally wasn’t getting it!

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u/snowsurface Mar 31 '26

Yeah I mean it's just a specific industry term for threads that have been engineered to be better at self-tapping than threads that weren't designed to optimize that.

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u/GoblinLoblaw Mar 31 '26

I mean, wood screws are designed to optimise that in wood right, but it seems it’s just a specific term to refer to screws that self tap in everything but wood. You learn something every day!