Stainless steel quarter-turn fastener QCTHSA-S

for panelscamspring

Overview
These retractable 1/4-turn fasteners provide positive locking for quick-change fixtures requiring frequent insertion and removal. They deliver consistent clamping force and prevent under- or over-tightening by the operator. Designed to be used with the corresponding cam receptacle listed below, the fastener mounts to the fixture while the receptacle mounts to the base. The internal spring accommodates a range of fixture thicknesses. A one-quarter turn of the knob aligns and locks the fastener. Fasteners are marked with "ON" and "OFF" indicators showing pin position. Three socket-head cap screws for mounting are included (M3x0.5 - 6 mm long or M2x0.4 - 5 mm long). Body: 303 stainless steel; shank: SKS3 steel with electroless nickel plating; pins: 420J2 stainless steel; knob: 304 stainless steel.

Product Types

• QCTHSA — Plastic knob, steel shank
• QCTHSA-S — Stainless steel knob, steel shank

Part Listing (selected part)
Part: QCTHSA0834-20S
Plate thickness mm: 6 to 20
Thread mm: M3x0.50 - depth 6 mm
Shank diameter mm: 8
Insert diameter mm: 18
Rim diameter mm: 34
Knob diameter mm: 40
P.C.D. mm: 28
Shank length mm: 20
Knob and rim - engaged height mm: 32.3
Knob and rim height mm: 43.9

Technical specifications

• Model / Series: QCTHSA
• Selected part number: QCTHSA0834-20S
• Function: 1/4-turn fastener, retractable
• Intended use: Quick-change fixtures allowing frequent insertion/removal
• Plate thickness range: 6 to 20 mm
• Thread: M3 x 0.50, depth 6 mm
• Shank diameter: 8 mm
• Insert diameter: 18 mm
• Rim diameter: 34 mm
• Knob diameter: 40 mm
• P.C.D.: 28 mm
• Shank length: 20 mm
• Engaged height (knob and rim): 32.3 mm
• Overall knob and rim height: 43.9 mm
• Materials: body — 303 stainless steel; shank — SKS3 steel with electroless nickel plating; pins — 420J2 stainless steel; knob — 304 stainless steel
• Mounting hardware included: three socket-head cap screws (M3x0.5 - 6 mm or M2x0.4 - 5 mm)
• Features: spring-loaded thickness compensation; "ON"/"OFF" position indicators; consistent clamping force; designed to pair with cam receptacle