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Location：Home->Brand->1/4-20 UNC

1/4-20 UNC

Part No.	Remarks	THREAD SIZE	THREAD CALL OUT	HD ±.005	L ±.015	D MAX.	IL REF.	LB ±.015	ILB REF.	IATD MAX.	HOLE DEPTH MIN.	THREAD	.030 - .090 MAT. THICKNESS DRILL SIZE	.030 - .090 MAT. THICKNESS DECIMAL	.091 - .124 MAT. THICKNESS DRILL SIZE	.091 - .124 MAT. THICKNESS DECIMAL	.125 - .186 MAT. THICKNESS DRILL SIZE	.125 - .186 MAT. THICKNESS DECIMAL	.187 - OVER MAT. THICKNESS DRILL SIZE	.187 - OVER MAT. THICKNESS DECIMAL
AT502A1-420	AT502A1-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A2-420	AT502A2-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A3-420	AT502A3-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A3R-420	AT502A3R-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A3T-420	AT502A3T-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A4-420	AT502A4-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A4T-420	AT502A4T-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A5-420	AT502A5-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A6-420	AT502A6-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A7-420	AT502A7-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A8-420	AT502A8-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A9-420	AT502A9-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A9A-420	AT502A9A-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A9B-420	AT502A9B-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A9T-420	AT502A9T-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502A10-420	AT502A10-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502B1-420	AT502B1-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502B2-420	AT502B2-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502B3-420	AT502B3-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906
AT502B3R-420	AT502B3R-420	1/4-20 UNC	420	0.4	0.515	0.3745	0.275	1.005	0.76	0.615	0.54	1/4-20 UNC	3/8	0.375	3/8	0.375	“W”	0.386	25/64	0.3906