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Heyco® Lockit™ ST and RDD Strain
Relief Bushings

Lockit™ Strain Reliefs for Round Cables
	UL Approved for Cable Diameter Range			UL Approved for Cable Diameter Range and UL Type
Mounting Hole Diameter →	11,5 x 13,0 mm	17,5 x 17,5 mm		.625" (15,9 mm) Ø	Will Fit Electrical Knock-outs					1.250" (31,8 mm) Ø
Mounting Hole Diameter →	11,5 x 13,0 mm	17,5 x 17,5 mm		.625" (15,9 mm) Ø	.875" (22,2 mm) Ø			1.109" (28,2 mm) Ø		1.250" (31,8 mm) Ø
LOCKIT Lockit Variety	ST 101N	ST 201N	ST 301N	RDD 101 RDD 101-7 RDD 101-90	RDD 201 RDD 201-2 RDD 201-90	RDD 301 RDD 301-2 RDD 301-90	RDD 401 RDD 401-2	RDD 501	RDD 601	RDD 701
UL DIA. RANGE →	.220" - .290"	.290" - .360"	.355" - .420"	.220" - .290" 5,6 - 7,4 mm	.290" - .385" 7,4 - 9,8 mm	.340" - .430" 8,6 - 10,9 mm	.420" - .450"	.525" - .600"	.600" - .700"	.720" - .830"
UL Type
S	X	X	X	X	X	X	X	X	X	X
SE	X	X	X	X	X	X	X	X	X	X
SEO	X	X	X	X	X	X	X	X	X	X
SEOO									X
SEOOW	X	X	X	X	X	X	X		X	X
SEOW	X	X	X	X	X	X	X		X	X
SJ	X	X	X	X	X	X	X	X	X
SJE								X
SJEOOW	X	X	X	X	X	X	X
SJEOW	X	X	X	X	X	X	X
SJO	X	X	X	X	X	X	X	X	X
SJOO	X	X	X	X	X	X	X	X	X	X
SJOOW	X	X	X	X	X	X	X
SJOW	X	X	X	X	X	X	X
SJT								X	X
SJTEOOW	X	X	X	X	X	X	X
SJTEOW	X	X	X	X	X	X	X
SJTO	X	X	X	X	X	X	X	X
SJTOO	X	X	X	X	X	X	X	X
SJTOOW	X	X	X	X	X	X	X
SJTOW	X	X	X	X	X	X	X
SJTW	X	X	X	X	X	X	X
SO	X	X	X	X	X	X	X	X	X	X
SOO	X	X	X	X	X	X	X	X	X	X
SOOW	X	X	X	X	X	X	X			X
SOW	X	X	X	X	X	X	X			X
SRDT									X
ST									X
STO								X	X
STOO								X	X
STOOW									X
STOW									X
SV	X	X	X	X	X	X	X			X
SVE	X	X	X	X	X	X	X			X
SVEO	X	X	X	X	X	X	X			X
SVO	X	X	X	X	X	X	X			X
SVOO	X	X	X	X	X	X	X			X

Consult Heyco for UL Type designations not shown.
* UL approved for Cable Diameter Range.
** UL approved for Cable Diameter Range and Type.