ST-1200 Line - Size 4
Square Hole Receptacle

The 1219-QC4 receptacle features compact size and fast installation, while providing all the advantages of spiral-cam quarter-turn fastening. Easily snapped into the underside of a square hole, it is self-retaining and it remains rattle-free whether the fastener is opened or locked.

In many cases, 1219-QC4 can replace square hole caged nuts on existing equipment.

This is a highly durable fastener, with excellent strength for its small size.

Technical Information

Working tension (minimum): 11 lb

Safe load without distortion: 30 lb maximum

Minimum distance between holes (edge to edge): .50 inches (12.70 mm)

Gap between panel and support face (caused by receptacle clip width, see drawing):.02 inches (.51 mm)

Recommended spring deflection: .020 to .045 in. (.51 to 1.14 mm)

Material: All parts are carbon steel, spring temper.

Finish:

Stud Length Calculation
Panel Preparation Drawing Stud Installation Drawing

Add panel thickness, plus receptacle "H" dimension (.452 in. (11.48 mm)). Select a stud with an "Grip Length" nearest to, but less than, that total. If the stud "Grip Length" dimension is not at least .025 in. (.64 mm) less than that total, add a 127P-4 plastic washer under the head to provide sufficient spring deflection.

Square Hole Receptacle Dimension Drawing Top View Square Hole Receptacle Side View Dimension Drawing
Panel Thickness Stud Grip Grip Length 127P-4 Washer
inch mm inch mm
.019-.043 .48-1.09 45 .450 11.43 None
.044-.068 1.12-1.73 50 .500 12.70 One
.069-.093 1.75-2.36 50 .500 12.70 None
.094-.118 2.39-3.00 55 .550 13.97 One
.119-.143 3.02-3.63 55 .550 13.97 None
.144-.168 3.66-4.27 60 .600 15.24 One
.169-.193 4.29-4.90 60 .600 15.24 None
.194-.218 4.93-5.54 65 .650 16.51 One
.219-.243 5.56-6.17 65 .650 16.51 None
.244-.268 6.20-6.81 70 .700 17.78 One
.269-.293 6.83-7.44 70 .700 17.78 None
.294-.318 7.47-8.08 75 .750 19.05 One
.319-.343 8.10-8.71 75 .750 19.05 None
.344-.368 8.74-9.35 80 .800 20.32 One
.369-.393 937-9.98 80 .800 20.32 None

Note:

  1. To provide correct locking tension, some studs are fitted with a .025 in. (.64 mm) thick plastic washer under the head. Part number 127P-4, which is offered for this use, differs from part number 127P-4B.
  2. The 1219-R4-SS Snap Ring is the only retainer which can fit inside the 1219-QC4 allowing flush contact between the panel and receptacle clips.
Receptacle Hole
Square Hole Receptacle Installation Support Preparation Dimension Drawing
Support
Thickness		 Receptacle
Required
.031-.056 1219-QC416-Z3CT
.058-.078 1219-QC420-Z3CT
.079-.098 1219-QC425-Z3CT
.102-.125 1219-QC430-Z3CT
Installation
Square Hole Receptacle Installation Procedure Drawings