Stainless steel quarter-turn fastener QCWESA series

for panelsspringwith wedge

Overview
These heavy-duty ball-locking pins provide positive locking in quick-change applications with frequent insertion and removal of a fixture. They offer repeatable clamping with a retractable-pin operation to avoid interference when removing the fixture from the base.

How it works
When the knob is rotated a quarter turn, the balls expand and lock the fixture in place. The fastener remains locked until the knob is turned to 'OFF', at which point the balls retract into the shank and the shank can be raised clear of the base plate for no-tool removal. The retractable pin allows the fastener to slide off the base without interference.

Materials
Fastener body: 303 stainless steel.
Knob: 304 stainless steel.
Wedge, balls and spring: stainless steel.

Usage / Installation
Thread the pin into the fixture and mount the receptacle to the base. Designed to be used with the ball-lock receptacles referenced in the parts table.

Table - Part Options
189512 | QCWESA1227-16S | Plate thickness 6–16 mm | Thread: M2 x 0.4 (depth 4) | D=12 | L=17.5 | Clamping ~220 lbs | Holding ~560 lbs | Receptacle QCWES1225-B
189513 | QCWESA1636-20S | Plate thickness 6–20 mm | Thread: M3 x 0.5 (depth 6) | D=16 | L=21.5 | Clamping ~450 lbs | Holding ~1120 lbs | Receptacle QCWES1634-B

Media / Documents
Downloadable PDFs and selection guides are available with detailed dimensions and specifications.

Technical specifications

• Product family / model: QCWESA
• Function: Ball-lock, retractable, quarter-turn locking fastener
• Body material: 303 stainless steel
• Knob material: 304 stainless steel
• Internal components (wedge, balls, spring): stainless steel
• Clamping force examples: up to 450 lbs (varies by part)
• Holding force examples: up to 1,120 lbs (varies by part)
• Thread options: M2 x 0.4 (depth 4), M3 x 0.5 (depth 6)
• Designed for frequent insertion/removal with no-tool operation
• Intended to be used with matching ball-lock receptacles (referenced above)