PRODUCT FAMILY COLLECTION

Core Custom Screws

Shoulder, security, hollow, flange, hand-adjustment and set screw designs for daily engineering requirements.

Drawing and sample checks

Products	Application	What to specify	What to check
Shoulder & Step Screws	A head, a locating shoulder and a threaded section combine fastening with controlled spacing or movement.	Include mating bore details, critical shoulder dimensions, surface texture and required dimensional inspection.	Read the clearance calculation below alongside these interfaces. A satisfactory axial gap does not by itself establish the bore fit or the required geometric relationship.
Security & Tamper-Resistant Screws	Special drive interfaces help restrict casual access while allowing an approved service tool to operate the screw.	Provide the drive drawing or matching tool specification. Tamper resistance depends on tool availability and the complete assembly; it is not absolute security.	Keep drive acceptance and access acceptance separate. A pin-in profile can restrict casual access, but the profile alone does not establish a security rating.
Hollow & Through-Hole Screws	An axial bore creates a passage through a threaded component for an application-specific routing or flow requirement.	State bore diameter and depth, permitted burrs, cleanliness and any agreed leak or pressure test. A through hole alone does not establish a pressure rating.	External CCD screening can support visible profile checks. Verify inaccessible bore features with a suitable separate method, and use the application matrix below to distinguish cable, flow and sealing requirements.
Custom Flange Screws	An integral flange provides a drawing-defined bearing footprint without a separately handled washer.	Include the mating material and bearing-face requirements. A larger flange does not automatically prevent surface damage.	Record which faces may contact and which must remain clear. Where marking, preload or repeated service matters, agree an assembly trial for the actual surface system instead of inferring performance from flange diameter.
Knurled Thumb & Adjustment Screws	A grip-oriented head supports manual adjustment, with optional tool drive for the specified assembly method.	Specify head grip, adjustment travel and any required locking method. Hand grip alone is not a calibrated tightening torque.	For sample approval, identify the mating support and contact part, trial the agreed adjustment sequence and record position and contact condition. Hand operation is not a measured tightening procedure; specify a separate method where controlled torque is required.
Custom Set Screws & Grub Screws	Headless threaded components transfer a locating or clamping action through a specified tip.	State tip geometry, mating surface, drive and expected function. Clamping performance depends on the full assembly.	Review repeated adjustment and retention on the actual joint. Point geometry and screw diameter alone do not provide a universal holding-force or tightening-torque value.