Internal Tooth Lock Washers

DIN 6797 J are internal toothed washers that can guarantee discreet locking, in particular on non-flat bearing surfaces. DIN 6797 J Internal Tooth Lock Washers have teeth around the inside circumference that consist of twisted prongs. Suggested for small OD heads like cheese heads, the teeth

Additional information

DIN 6797 J are internal toothed washers that can guarantee discreet locking, in particular on non-flat bearing surfaces.

DIN 6797 J Internal Tooth Lock Washers have teeth around the inside circumference that consist of twisted prongs. Suggested for small OD heads like cheese heads, the teeth must contact the underside of the head and the mating surface so avoid oversized holes to ensure maximum effectiveness. Use when the washer’s teeth—and surface indentations caused by the teeth—need to hidden. Choose from spring steel with a phosphate finish or zinc plated, and stainless steel. Size is the washer’s nominal hole size and should be matched to the screw size (to illustrate, use an M8 washer with an M8 screw). They are also known as DIN 6797 Type J.

Size	2.2	2.7	3.2	3.7	4.3	5.3	6.4	7.4	8.4	10.5
d	min=nominal size		2.2	2.7	3.2	3.7	4.3	5.3	6.4	7.4	8.4	10.5
max		2.34	2.84	3.38	3.88	4.48	5.48	6.62	7.62	8.62	10.77
dc	max=nominal size		4.5	5.5	6	7	8	10	11	12.5	15	18
min		4.2	5.2	5.7	6.64	7.64	9.64	10.57	12.07	14.57	17.57
t	0.3	0.4	0.4	0.5	0.5	0.6	0.7	0.8	0.8	0.9
Number of Teeth	6	6	6	6	8	8	8	8	8	9
per 1000 units≈kg	0.04	0.045	0.045	0.085	0.1	0.2	0.25	0.35	0.55	0.9
For Nominal Thread Diameter	M2	M2.5	M3	M3.5	M4	M5	M6	M7	M8	M10
Size	13	15	17	19	21	23	25	28	31
d	min=nominal size		13	15	17	19	21	23	25	28	31
max		13.27	15.27	17.27	19.33	21.33	23.33	25.33	28.33	31.39
dc	max=nominal size		20.5	24	26	30	33	36	38	44	48
min		19.98	23.48	25.48	29.48	32.38	35.38	37.38	43.38	47.38
t	1	1	1.2	1.4	1.4	1.5	1.5	1.6	1.6
Number of Teeth	10	10	12	12	12	14	14	14	14
per 1000 units≈kg	1.2	1.9	2.4	3.7	4.1	6	6.5	8.5	9.5
For Nominal Thread Diameter	M12	M14	M16	M18	M20	M22	M24	M27	M30