Shoulder Bolts & Stripper Bolts
A shoulder bolt is a bearing surface, a guide and a fastener in one part — and in press tools, the stripper bolt version carries the stripper plate itself.
What are shoulder bolts & stripper bolts?
Shoulder bolts (shoulder screws) have a precision-ground cylindrical shoulder between head and thread; the shoulder acts as a shaft for pivots, rollers and guided parts. Stripper bolts are the die-making version — they suspend and guide the stripper plate, setting its stroke. Stopper bolts add urethane cushioning for end-stop duties.
Typical materials
Alloy steel, hardened, with ground shoulder to close tolerance; stainless variants for corrosive environments.
Types of shoulder bolts & stripper bolts
Shoulder bolts (screws)
Ground shoulder diameter with socket head — pivot and guide standard.
Stripper bolts (MSB)
Long guided shoulder for stripper plates in press tools.
Stopper bolts with urethane
Cushioned contact for moving-plate end stops.
Specialty / circulative bolts
Application-specific forms supplied on enquiry.
How to select shoulder bolts & stripper bolts
- Shoulder diameter and length — the functional dimensions.
- Thread size below the shoulder for the mating plate.
- Head style and wrenching (socket standard).
- For stripper bolts: stroke and plate thickness set the length.
Not sure? Send what you have — a part number, drawing or photo — and our engineering team will confirm the selection.
Frequently asked questions
- What is a stripper bolt?
- A shoulder bolt made for press dies: its long ground shoulder passes through the stripper plate, suspending it and guiding its travel. The shoulder length sets the plate stroke, so it is chosen against the tool design rather than as a generic fastener.
Related components
Plungers
Plungers give machines a sense of position — the click of a detent, the hold of a spring-loaded ball, the lock of an index pin.
Washers & Shims
Millimetres are set with washers and shims — the small parts that give an assembly its exact heights, gaps and preloads.
Die Springs
Die springs pack maximum force into a standard hole — rectangular wire and controlled stress make them the force standard in press tools.
Need shoulder bolts & stripper bolts?
Tell us the specification, quantity and application — or just send the drawing.