Technical Guides
Technical Guides
Your Drawing Lists the Thread Size but Not the Engagement Length—What Should You Confirm Before Sending the RFQ?
A practical RFQ checklist for separating a metric thread callout from effective full-thread engagement, tapped depth, drill depth and blind-hole geometry.
Hex Flange Bolts: Reading the Drawing and Checking the Bearing Fit
Flange diameter alone does not define bearing contact. Check the underhead fillet, hole opening, bearing footprint and tightening conditions.
Set Screw Point Types and Mating Surfaces
Flat, cup, truncated cone and dog points need different mating conditions. Learn what to confirm in drawings, manufacturing inspection and a set screw enquiry.
A Magnet Attracts Your Stainless Steel Bolts—Does That Mean the Grade Is Wrong?
A magnet response alone cannot identify a stainless steel grade or decide a lot. See what to record, trace and verify before disposition.
M12 flat washers: specification checks for sourcing and RFQs
Source M12 flat washers by checking the standard series, dimensions, tolerances, material, hardness, finish and assembly needs before requesting a quote.
When a PO Adds Electroplating: Which Fastener Approvals Need Reopening?
A change-control guide for fastener POs that add electroplating: define the supplied condition, reopen the right evidence, and set clear sample and lot boundaries.
Do Not Specify a Lock Nut as “Nylon Insert” Alone: Form, Property Class and Prevailing Torque
An M12 nylon insert description does not define one product. Separate nut form, mechanical property class, prevailing-torque testing and lot acceptance in the RFQ.
8.8, 10.9 and 12.9 Are Not Material Grades: How to Specify Bolt Property Class
Property class, product standard, material, finish and documents answer different questions. Learn how to specify 8.8, 10.9 or 12.9 in a clear fastener RFQ.
Send your application, size, material or surface finish requirements. The Wohe technical team can help match a suitable product solution.