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GN 638 Ball Jointed Leveling Feet Steel Grub Screw, with Plastic Thrust Pad

Photo

GN 638 Steel Ball Jointed Leveling Feet, with Plastic Thrust Pad

Standard Sheet GN 638 Print This Page Strength Values of Screws Plastic Characteristics Stainless Steel Characteristics

Product description

Information

Ball jointed leveling feet GN 638 are used for installing and leveling devices or for pressing and clamping.
The plastic thrust pad prevents damage to sensitive surfaces.

Together with the thrust pad, the ball thrust point forms a ball joint that adapts to mounting surfaces that are uneven or not perpendicular to the screw axis. It also prevents the clamping surface from rotating when the thrust pad is in contact with the clamping surface.

The ball jointed leveling feet are supplied unassembled. The ball end of the threaded stud can be easily pressed into the thrust pad and removed again if needed. The ball diameter d₃ is smaller than the core diameter of the thread, with the effect that the threaded stud can be screwed in on the ball side.

The indicated static load serves as a guide value; a corresponding safety factor must be additionally taken into account depending on the application.

Specification

Thrust pad
Plastic, Polyacetal (POM)
Operating temperature up to 176 °F (80 °C)
Black, matte finish

Grub screw
SteelST
Property class 5.8
Blackened finish

RoHS

Accessory

Threaded Mounting Plates GN 349
Threaded Tube Ends EN 448

Technical drawing

GN 638 Steel Ball Jointed Leveling Feet, with Plastic Thrust Pad sketch

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Part Options / Table

Part Number	d₁	d₂	l₁	d₃ ≈	l₂	A/F	Static load F_s (See information)

638-15-1/4X20-26-ST	0.59	1/4 x 20	1.02	0.18	0.30	1/8	787 lbf (3.5 kN)
638-15-1/4X20-36-ST	0.59	1/4 x 20	1.42	0.18	0.30	1/8	787 lbf (3.5 kN)
638-15-1/4X20-46-ST	0.59	1/4 x 20	1.81	0.18	0.30	1/8	787 lbf (3.5 kN)
638-15-5/16X18-20-ST	0.59	5/16 x 18	0.79	0.18	0.30	1/8	787 lbf (3.5 kN)
638-15-5/16X18-35-ST	0.59	5/16 x 18	1.38	0.18	0.30	1/8	787 lbf (3.5 kN)
638-15-5/16X18-45-ST	0.59	5/16 x 18	1.77	0.18	0.30	1/8	787 lbf (3.5 kN)
638-15-5/16X18-58-ST	0.59	5/16 x 18	2.28	0.18	0.30	1/8	787 lbf (3.5 kN)
638-18-3/8X16-34-ST	0.71	3/8 x 16	1.34	0.24	0.36	3/16	787 lbf (3.5 kN)
638-18-3/8X16-44-ST	0.71	3/8 x 16	1.73	0.24	0.36	3/16	787 lbf (3.5 kN)
638-18-3/8X16-57-ST	0.71	3/8 x 16	2.24	0.24	0.36	3/16	787 lbf (3.5 kN)
638-18-3/8X16-74-ST	0.71	3/8 x 16	2.91	0.24	0.36	3/16	787 lbf (3.5 kN)
638-21-3/8X16-34-ST	0.83	3/8 x 16	1.34	0.24	0.39	3/16	787 lbf (3.5 kN)
638-21-3/8X16-44-ST	0.83	3/8 x 16	1.73	0.24	0.39	3/16	787 lbf (3.5 kN)
638-21-3/8X16-57-ST	0.83	3/8 x 16	2.24	0.24	0.39	3/16	787 lbf (3.5 kN)
638-21-3/8X16-74-ST	0.83	3/8 x 16	2.91	0.24	0.39	3/16	787 lbf (3.5 kN)
638-21-1/2X13-34-ST	0.83	1/2 x 13	1.34	0.31	0.39	3/16	787 lbf (3.5 kN)
638-21-1/2X13-57-ST	0.83	1/2 x 13	2.24	0.31	0.39	3/16	787 lbf (3.5 kN)
638-21-1/2X13-74-ST	0.83	1/2 x 13	2.91	0.31	0.39	3/16	787 lbf (3.5 kN)
638-21-1/2X13-94-ST	0.83	1/2 x 13	3.70	0.31	0.39	3/16	787 lbf (3.5 kN)
638-25-3/8X16-34-ST	0.98	3/8 x 16	1.34	0.24	0.41	3/16	787 lbf (3.5 kN)
638-25-3/8X16-44-ST	0.98	3/8 x 16	1.73	0.24	0.41	3/16	787 lbf (3.5 kN)
638-25-3/8X16-57-ST	0.98	3/8 x 16	2.24	0.24	0.41	3/16	787 lbf (3.5 kN)
638-25-3/8X16-74-ST	0.98	3/8 x 16	2.91	0.24	0.41	3/16	787 lbf (3.5 kN)
638-25-1/2X13-34-ST	0.98	1/2 x 13	1.34	0.31	0.41	3/16	787 lbf (3.5 kN)
638-25-1/2X13-57-ST	0.98	1/2 x 13	2.24	0.31	0.41	3/16	787 lbf (3.5 kN)
638-25-1/2X13-74-ST	0.98	1/2 x 13	2.91	0.31	0.41	3/16	787 lbf (3.5 kN)
638-25-1/2X13-94-ST	0.98	1/2 x 13	3.70	0.31	0.41	3/16	787 lbf (3.5 kN)
638-32-3/8X16-34-ST	1.26	3/8 x 16	1.34	0.24	0.43	3/16	787 lbf (3.5 kN)
638-32-3/8X16-44-ST	1.26	3/8 x 16	1.73	0.24	0.43	3/16	787 lbf (3.5 kN)
638-32-3/8X16-57-ST	1.26	3/8 x 16	2.24	0.24	0.43	3/16	787 lbf (3.5 kN)
638-32-3/8X16-74-ST	1.26	3/8 x 16	2.91	0.24	0.43	3/16	787 lbf (3.5 kN)
638-32-1/2X13-34-ST	1.26	1/2 x 13	1.34	0.31	0.43	3/16	787 lbf (3.5 kN)
638-32-1/2X13-57-ST	1.26	1/2 x 13	2.24	0.31	0.43	3/16	787 lbf (3.5 kN)
638-32-1/2X13-74-ST	1.26	1/2 x 13	2.91	0.31	0.43	3/16	787 lbf (3.5 kN)
638-32-1/2X13-94-ST	1.26	1/2 x 13	3.70	0.31	0.43	3/16	787 lbf (3.5 kN)
638-40-3/8X16-34-ST	1.57	3/8 x 16	1.34	0.24	0.51	3/16	787 lbf (3.5 kN)
638-40-3/8X16-44-ST	1.57	3/8 x 16	1.73	0.24	0.51	3/16	787 lbf (3.5 kN)
638-40-3/8X16-57-ST	1.57	3/8 x 16	2.24	0.24	0.51	3/16	787 lbf (3.5 kN)
638-40-3/8X16-74-ST	1.57	3/8 x 16	2.91	0.24	0.51	3/16	787 lbf (3.5 kN)
638-40-1/2X13-34-ST	1.57	1/2 x 13	1.34	0.31	0.51	3/16	787 lbf (3.5 kN)
638-40-1/2X13-57-ST	1.57	1/2 x 13	2.24	0.31	0.51	3/16	787 lbf (3.5 kN)
638-40-1/2X13-74-ST	1.57	1/2 x 13	2.91	0.31	0.51	3/16	787 lbf (3.5 kN)
638-40-1/2X13-94-ST	1.57	1/2 x 13	3.70	0.31	0.51	3/16	787 lbf (3.5 kN)
638-50-3/8X16-34-ST	1.97	3/8 x 16	1.34	0.24	0.51	3/16	787 lbf (3.5 kN)
638-50-3/8X16-44-ST	1.97	3/8 x 16	1.73	0.24	0.51	3/16	787 lbf (3.5 kN)
638-50-3/8X16-57-ST	1.97	3/8 x 16	2.24	0.24	0.51	3/16	787 lbf (3.5 kN)
638-50-3/8X16-74-ST	1.97	3/8 x 16	2.91	0.24	0.51	3/16	787 lbf (3.5 kN)
638-50-1/2X13-34-ST	1.97	1/2 x 13	1.34	0.31	0.51	3/16	787 lbf (3.5 kN)
638-50-1/2X13-57-ST	1.97	1/2 x 13	2.24	0.31	0.51	3/16	787 lbf (3.5 kN)
638-50-1/2X13-74-ST	1.97	1/2 x 13	2.91	0.31	0.51	3/16	787 lbf (3.5 kN)
638-50-1/2X13-94-ST	1.97	1/2 x 13	3.70	0.31	0.51	3/16	787 lbf (3.5 kN)
638-15-M6-26-ST	0.59	M 6	1.02	0.18	0.30	3	787 lbf (3.5 kN)
638-15-M6-36-ST	0.59	M 6	1.42	0.18	0.30	3	787 lbf (3.5 kN)
638-15-M6-46-ST	0.59	M 6	1.81	0.18	0.30	3	787 lbf (3.5 kN)
638-15-M8-20-ST	0.59	M 8	0.79	0.24	0.30	4	787 lbf (3.5 kN)
638-15-M8-35-ST	0.59	M 8	1.38	0.24	0.30	4	787 lbf (3.5 kN)
638-15-M8-45-ST	0.59	M 8	1.77	0.24	0.30	4	787 lbf (3.5 kN)
638-15-M8-58-ST	0.59	M 8	2.28	0.24	0.30	4	787 lbf (3.5 kN)
638-18-M6-26-ST	0.71	M 6	1.02	0.18	0.36	3	787 lbf (3.5 kN)
638-18-M6-36-ST	0.71	M 6	1.42	0.18	0.36	3	787 lbf (3.5 kN)
638-18-M6-46-ST	0.71	M 6	1.81	0.18	0.36	3	787 lbf (3.5 kN)
638-18-M8-20-ST	0.71	M 8	0.79	0.24	0.36	4	787 lbf (3.5 kN)
638-18-M8-35-ST	0.71	M 8	1.38	0.24	0.36	4	787 lbf (3.5 kN)
638-18-M8-45-ST	0.71	M 8	1.77	0.24	0.36	4	787 lbf (3.5 kN)
638-18-M8-58-ST	0.71	M 8	2.28	0.24	0.36	4	787 lbf (3.5 kN)
638-18-M10-34-ST	0.71	M 10	1.34	0.31	0.36	5	787 lbf (3.5 kN)
638-18-M10-44-ST	0.71	M 10	1.73	0.31	0.36	5	787 lbf (3.5 kN)
638-18-M10-57-ST	0.71	M 10	2.24	0.31	0.36	5	787 lbf (3.5 kN)
638-18-M10-74-ST	0.71	M 10	2.91	0.31	0.36	5	787 lbf (3.5 kN)
638-21-M6-26-ST	0.83	M 6	1.02	0.18	0.39	3	787 lbf (3.5 kN)
638-21-M6-36-ST	0.83	M 6	1.42	0.18	0.39	3	787 lbf (3.5 kN)
638-21-M6-46-ST	0.83	M 6	1.81	0.18	0.39	3	787 lbf (3.5 kN)
638-21-M8-20-ST	0.83	M 8	0.79	0.24	0.39	4	787 lbf (3.5 kN)
638-21-M8-35-ST	0.83	M 8	1.38	0.24	0.39	4	787 lbf (3.5 kN)
638-21-M8-45-ST	0.83	M 8	1.77	0.24	0.39	4	787 lbf (3.5 kN)
638-21-M8-58-ST	0.83	M 8	2.28	0.24	0.39	4	787 lbf (3.5 kN)
638-21-M10-34-ST	0.83	M 10	1.34	0.31	0.39	5	787 lbf (3.5 kN)
638-21-M10-44-ST	0.83	M 10	1.73	0.31	0.39	5	787 lbf (3.5 kN)
638-21-M10-57-ST	0.83	M 10	2.24	0.31	0.39	5	787 lbf (3.5 kN)
638-21-M10-74-ST	0.83	M 10	2.91	0.31	0.39	5	787 lbf (3.5 kN)
638-21-M12-34-ST	0.83	M 12	1.34	0.37	0.39	6	787 lbf (3.5 kN)
638-21-M12-57-ST	0.83	M 12	2.24	0.37	0.39	6	787 lbf (3.5 kN)
638-21-M12-74-ST	0.83	M 12	2.91	0.37	0.39	6	787 lbf (3.5 kN)
638-21-M12-94-ST	0.83	M 12	3.70	0.37	0.39	6	787 lbf (3.5 kN)
638-25-M6-26-ST	0.98	M 6	1.02	0.18	0.41	3	787 lbf (3.5 kN)
638-25-M6-36-ST	0.98	M 6	1.42	0.18	0.41	3	787 lbf (3.5 kN)
638-25-M6-46-ST	0.98	M 6	1.81	0.18	0.41	3	787 lbf (3.5 kN)
638-25-M8-20-ST	0.98	M 8	0.79	0.24	0.41	4	787 lbf (3.5 kN)
638-25-M8-35-ST	0.98	M 8	1.38	0.24	0.41	4	787 lbf (3.5 kN)
638-25-M8-45-ST	0.98	M 8	1.77	0.24	0.41	4	787 lbf (3.5 kN)
638-25-M8-58-ST	0.98	M 8	2.28	0.24	0.41	4	787 lbf (3.5 kN)
638-25-M10-34-ST	0.98	M 10	1.34	0.31	0.41	5	787 lbf (3.5 kN)
638-25-M10-44-ST	0.98	M 10	1.73	0.31	0.41	5	787 lbf (3.5 kN)
638-25-M10-57-ST	0.98	M 10	2.24	0.31	0.41	5	787 lbf (3.5 kN)
638-25-M10-74-ST	0.98	M 10	2.91	0.31	0.41	5	787 lbf (3.5 kN)
638-25-M12-34-ST	0.98	M 12	1.34	0.37	0.41	6	787 lbf (3.5 kN)
638-25-M12-57-ST	0.98	M 12	2.24	0.37	0.41	6	787 lbf (3.5 kN)
638-25-M12-74-ST	0.98	M 12	2.91	0.37	0.41	6	787 lbf (3.5 kN)
638-25-M12-94-ST	0.98	M 12	3.70	0.37	0.41	6	787 lbf (3.5 kN)
638-32-M6-26-ST	1.26	M 6	1.02	0.18	0.43	3	787 lbf (3.5 kN)
638-32-M6-36-ST	1.26	M 6	1.42	0.18	0.43	3	787 lbf (3.5 kN)
638-32-M6-46-ST	1.26	M 6	1.81	0.18	0.43	3	787 lbf (3.5 kN)
638-32-M8-20-ST	1.26	M 8	0.79	0.24	0.43	4	787 lbf (3.5 kN)
638-32-M8-35-ST	1.26	M 8	1.38	0.24	0.43	4	787 lbf (3.5 kN)
638-32-M8-45-ST	1.26	M 8	1.77	0.24	0.43	4	787 lbf (3.5 kN)
638-32-M8-58-ST	1.26	M 8	2.28	0.24	0.43	4	787 lbf (3.5 kN)
638-32-M10-34-ST	1.26	M 10	1.34	0.31	0.43	5	787 lbf (3.5 kN)
638-32-M10-44-ST	1.26	M 10	1.73	0.31	0.43	5	787 lbf (3.5 kN)
638-32-M10-57-ST	1.26	M 10	2.24	0.31	0.43	5	787 lbf (3.5 kN)
638-32-M10-74-ST	1.26	M 10	2.91	0.31	0.43	5	787 lbf (3.5 kN)
638-32-M12-34-ST	1.26	M 12	1.34	0.37	0.43	6	787 lbf (3.5 kN)
638-32-M12-57-ST	1.26	M 12	2.24	0.37	0.43	6	787 lbf (3.5 kN)
638-32-M12-74-ST	1.26	M 12	2.91	0.37	0.43	6	787 lbf (3.5 kN)
638-32-M12-94-ST	1.26	M 12	3.70	0.37	0.43	6	787 lbf (3.5 kN)
638-40-M8-20-ST	1.57	M 8	0.79	0.24	0.51	4	787 lbf (3.5 kN)
638-40-M8-35-ST	1.57	M 8	1.38	0.24	0.51	4	787 lbf (3.5 kN)
638-40-M8-45-ST	1.57	M 8	1.77	0.24	0.51	4	787 lbf (3.5 kN)
638-40-M8-58-ST	1.57	M 8	2.28	0.24	0.51	4	787 lbf (3.5 kN)
638-40-M10-34-ST	1.57	M 10	1.34	0.31	0.51	5	787 lbf (3.5 kN)
638-40-M10-44-ST	1.57	M 10	1.73	0.31	0.51	5	787 lbf (3.5 kN)
638-40-M10-57-ST	1.57	M 10	2.24	0.31	0.51	5	787 lbf (3.5 kN)
638-40-M10-74-ST	1.57	M 10	2.91	0.31	0.51	5	787 lbf (3.5 kN)
638-40-M12-34-ST	1.57	M 12	1.34	0.37	0.51	6	787 lbf (3.5 kN)
638-40-M12-57-ST	1.57	M 12	2.24	0.37	0.51	6	787 lbf (3.5 kN)
638-40-M12-74-ST	1.57	M 12	2.91	0.37	0.51	6	787 lbf (3.5 kN)
638-40-M12-94-ST	1.57	M 12	3.70	0.37	0.51	6	787 lbf (3.5 kN)
638-50-M8-20-ST	1.97	M 8	0.79	0.24	0.61	4	787 lbf (3.5 kN)
638-50-M8-35-ST	1.97	M 8	1.38	0.24	0.61	4	787 lbf (3.5 kN)
638-50-M8-45-ST	1.97	M 8	1.77	0.24	0.61	4	787 lbf (3.5 kN)
638-50-M8-58-ST	1.97	M 8	2.28	0.24	0.61	4	787 lbf (3.5 kN)
638-50-M10-34-ST	1.97	M 10	1.34	0.31	0.61	5	787 lbf (3.5 kN)
638-50-M10-44-ST	1.97	M 10	1.73	0.31	0.61	5	787 lbf (3.5 kN)
638-50-M10-57-ST	1.97	M 10	2.24	0.31	0.61	5	787 lbf (3.5 kN)
638-50-M10-74-ST	1.97	M 10	2.91	0.31	0.61	5	787 lbf (3.5 kN)
638-50-M12-34-ST	1.97	M 12	1.34	0.37	0.61	6	787 lbf (3.5 kN)
638-50-M12-57-ST	1.97	M 12	2.24	0.37	0.61	6	787 lbf (3.5 kN)
638-50-M12-74-ST	1.97	M 12	2.91	0.37	0.61	6	787 lbf (3.5 kN)
638-50-M12-94-ST	1.97	M 12	3.70	0.37	0.61	6	787 lbf (3.5 kN)

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Inch

Dimensions in: Inch (change to Metric)

d₁	d₂	l₁				d₃ ≈	l₂	A/F	Static load F_s (See information)

0.59	1/4 x 20	1.02	1.42	1.81	-	0.18	0.30	1/8	787 lbf (3.5 kN)
0.59	5/16 x 18	0.79	1.38	1.77	2.28	0.18	0.30	1/8	787 lbf (3.5 kN)
0.71	3/8 x 16	1.34	1.73	2.24	2.91	0.24	0.36	3/16	787 lbf (3.5 kN)
0.83	3/8 x 16	1.34	1.73	2.24	2.91	0.24	0.39	3/16	787 lbf (3.5 kN)
0.83	1/2 x 13	1.34	2.24	2.91	3.70	0.31	0.39	3/16	787 lbf (3.5 kN)
0.98	3/8 x 16	1.34	1.73	2.24	2.91	0.24	0.41	3/16	787 lbf (3.5 kN)
0.98	1/2 x 13	1.34	2.24	2.91	3.70	0.31	0.41	3/16	787 lbf (3.5 kN)
1.26	3/8 x 16	1.34	1.73	2.24	2.91	0.24	0.43	3/16	787 lbf (3.5 kN)
1.26	1/2 x 13	1.34	2.24	2.91	3.70	0.31	0.43	3/16	787 lbf (3.5 kN)
1.57	3/8 x 16	1.34	1.73	2.24	2.91	0.24	0.51	3/16	787 lbf (3.5 kN)
1.57	1/2 x 13	1.34	2.24	2.91	3.70	0.31	0.51	3/16	787 lbf (3.5 kN)
1.97	3/8 x 16	1.34	1.73	2.24	2.91	0.24	0.51	3/16	787 lbf (3.5 kN)
1.97	1/2 x 13	1.34	2.24	2.91	3.70	0.31	0.51	3/16	787 lbf (3.5 kN)

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Metric

Dimensions in: Inch (change to Metric)

d₁	d₂	l₁				d₃ ≈	l₂	A/F	Static load F_s (See information)

0.59	M 6	1.02	1.42	1.81	-	0.18	0.30	3	787 lbf (3.5 kN)
0.59	M 8	0.79	1.38	1.77	2.28	0.24	0.30	4	787 lbf (3.5 kN)
0.71	M 6	1.02	1.42	1.81	-	0.18	0.36	3	787 lbf (3.5 kN)
0.71	M 8	0.79	1.38	1.77	2.28	0.24	0.36	4	787 lbf (3.5 kN)
0.71	M 10	1.34	1.73	2.24	2.91	0.31	0.36	5	787 lbf (3.5 kN)
0.83	M 6	1.02	1.42	1.81	-	0.18	0.39	3	787 lbf (3.5 kN)
0.83	M 8	0.79	1.38	1.77	2.28	0.24	0.39	4	787 lbf (3.5 kN)
0.83	M 10	1.34	1.73	2.24	2.91	0.31	0.39	5	787 lbf (3.5 kN)
0.83	M 12	1.34	2.24	2.91	3.70	0.37	0.39	6	787 lbf (3.5 kN)
0.98	M 6	1.02	1.42	1.81	-	0.18	0.41	3	787 lbf (3.5 kN)
0.98	M 8	0.79	1.38	1.77	2.28	0.24	0.41	4	787 lbf (3.5 kN)
0.98	M 10	1.34	1.73	2.24	2.91	0.31	0.41	5	787 lbf (3.5 kN)
0.98	M 12	1.34	2.24	2.91	3.70	0.37	0.41	6	787 lbf (3.5 kN)
1.26	M 6	1.02	1.42	1.81	-	0.18	0.43	3	787 lbf (3.5 kN)
1.26	M 8	0.79	1.38	1.77	2.28	0.24	0.43	4	787 lbf (3.5 kN)
1.26	M 10	1.34	1.73	2.24	2.91	0.31	0.43	5	787 lbf (3.5 kN)
1.26	M 12	1.34	2.24	2.91	3.70	0.37	0.43	6	787 lbf (3.5 kN)
1.57	M 8	0.79	1.38	1.77	2.28	0.24	0.51	4	787 lbf (3.5 kN)
1.57	M 10	1.34	1.73	2.24	2.91	0.31	0.51	5	787 lbf (3.5 kN)
1.57	M 12	1.34	2.24	2.91	3.70	0.37	0.51	6	787 lbf (3.5 kN)
1.97	M 8	0.79	1.38	1.77	2.28	0.24	0.61	4	787 lbf (3.5 kN)
1.97	M 10	1.34	1.73	2.24	2.91	0.31	0.61	5	787 lbf (3.5 kN)
1.97	M 12	1.34	2.24	2.91	3.70	0.37	0.61	6	787 lbf (3.5 kN)

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Total Canadian Dollars (net)

Can$4.21

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Quantity

Please note our quantity discounts (Canadian Dollars).

Min	Max	Price
1	249	Can$4.21
250	499	Can$3.86
500	999	Can$3.51
≥ 1000		Can$3.16

Prop 65: Not compliant

WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov

RoHS: Compliant

This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).

Weight: 0.011 lbs

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Phone: 1-800-397-6993

All Prices are in Canadian Dollars. Taxes Not Included.