Duncan Bolt: Fastening Solutions

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A-T Series

A-T Series Threaded Insert

The A-T Series Insert is unique in that it can be installed into most any material above .030/,76 mm in thickness. As the A-T Series is installed, the threaded portion is completely swaged 360° into the sleeve portion and the hole. This permits the A-T Series to be used with Grade 8/Metric 12.9 mating screws.

The A-T Series Insert is installed using lightweight, handheld pneumatic ARO tools that can be located at any position in your product's assembly sequence. The A-T Series Insert can be installed either prior to or after finish.

Thread Size	Thread Call Out	HD ±.005	L ±.015	D MAX.	IL MAX.	LB MAX.	ILB MAX.	IATD** MAX.	Hole Depth MIN.
4-40 UNC	440	.211	.370	.1875	.205	.660	.495	.395	.400
6-32 UNC	632	.240	.370	.2185	.205	.675	.505	.410	.400
8-32 UNC	832	.269	.370	.2495	.205	.675	.505	.410	.400
10-24 UNC	1024	.306	.370	.2805	.205	.685	.520	.385	.400
10-32 UNF	1032	.306	.370	.2805	.205	.685	.520	.385	.400
1/4-20 UNC	420	.400	.515	.3745	.275	1.005	.760	.615	.540
5/16-18 UNC	518	.528	.615	.4995	.325	1.065	.770	.630	.640
3/8-16 UNC	616	.588	.745	.5615	.390	1.450	1.095	.890	.770
1/2-13 UNC	813	.800	.935	.7485	.485	NA	NA	NA	.960

** Dimensions in minimum grip condition. Additional UNF thread sizes available. Contact AVK for details.

Thread Size	Thread Call Out	HD ±0,13	L ±0,38	D MAX.	IL MAX.	LB ±0,38	ILB MAX.	IATD** MAX.	Hole Depth MIN.
M3x0,5 ISO	350	5,36	9,40	4,76	5,21	16,77	12,57	10,03	10,16
M4x0,7 ISO	470	6,83	9,40	6,34	5,21	17,15	12,83	10,41	10,16
M5x0,8 ISO	580	7,77	9,40	7,12	5,21	17,40	13,21	9,78	10,16
M6x1,0 ISO	610	10,16	13,08	9,51	6,99	25,53	19,30	15,62	13,72
M8x1,25 ISO	8125	13,41	15,62	12,69	8,26	27,05	19,56	16,00	16,26
M10x1,5 ISO	1015	14,94	18,92	14,26	9,91	36,83	27,81	22,61	19,56
M12x1,75 ISO	12175	20,32	23,75	19,01	12,32	NA	NA	NA	24,38

** Dimensions in minimum grip condition.

HOLE SIZE / MATERIAL THICKNESS

Thread Size	.030-.090 Mat.THICKNESS Drill Size	Decimal	.091-.124 MAT.THICKNESS Drill Size	Decimal	.125-.186 MAT.THICKNESS Dril Size	Decimal	.187-OVER MAT.THICKNESS Drill Size	Decimal
4-40 UNC	3/16	.1875	#10	.1935	#10	.1935	#9	.1960
6-32 UNC	7/32	.2188	#2	.2210	#1	.2280	#1	.2280
8-32 UNC	1/4	.2500	“F”	.2570	17/64	.2656	17/64	.2656
10-24 UNC	9/32	.2812	“L”	.2900	“L”	.2900	19/64	.2969
10-32 UNF	9/32	.2812	“L”	.2900	“L”	.2900	19/64	.2969
1/4-20 UNC	3/8	.3750	3/8	.3750	“W”	.3860	25/64	.3906
5/16-18 UNC	1/2	.5000	1/2	.5000	33/64	.5156	33/64	.5156
3/8-16 UNC	9/16	.5625	9/16	.5625	37/64	.5781	37/64	.5781
1/2-13 UNC	3/4	.7500	49/64	.7656	25/32	.7810	51/64	.7970

Thread Size	0,76-2,29 MAT.THICKNESS Drill Size	Decimal	2,31-3,15 MAT.THICKNESS Drill Size	Decimal	3,17-4,72 MAT.THICKNESS Dril Size	Decimal	4,72-OVER MAT.THICKNESS Drill Size	Decimal
M3x0,5 ISO	4,75	.1875	4,90	.1935	4,90	.1935	4,97	.1960
M4x0,7 ISO	6,35	.2500	6,52	.2570	6,74	.2656	6,74	.2656
M5x0,8 ISO	7,14	.2812	7,36	.2900	7,36	.2900	7,54	.2969
M6x1,0 ISO	9,52	.3750	9,52	.3750	9,80	.3860	9,92	.3906
M8x1,25 ISO	12,70	.5000	12,70	.5000	13,09	.5156	13,09	.5156
M10x1,5 ISO	14,28	.5625	14,28	.5625	14,68	.5781	14,68	.5781
M12x1,75 ISO	19,05	.7500	19,44	.7656	19,83	.7810	20,24	.7970