AVK Industrial Products

World market leader of design, development and manufacturing of blind installed fasteners

A-T Series™ Knurled Threaded Insert

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

The A-T Series™ Knurled Threaded 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 Insert can be installed either prior to or after finish.

• Design Benefits
• Design Types
• Part Numbering System
• Thread Sizes

The A-T Series™ Insert - Design Benefits

REDUCED OVERALL LENGTH of the installed A-T Series Insert allows it to be used in limited clearance applications. QUALITY INSTALLATIONS even in variable thickness materials are assured by our spin/spin torque stall tools. INVENTORY REDUCTION is possible because one A-T Series™ Insert will work in any thickness material above .030/,76 mm.

INSTALLS INTO MOST ANY MATERIAL with a thickness over .030/,76 mm. CAN BE USED WITH GRADE 8/METRIC CLASS 12.9 SCREWS due to the A-T Series™ high shear load capability. AVAILABLE in Steel from stock. Aluminum, Brass and Series 304 Stainless Steel are available by special order. Contact AVK for details.

 

The A-T Series™ Insert - Various Design Types

CLOSED END Thread area is enclosed eliminating leakage past the threads from either side of the application.

The A-T Series™ Insert - Part Numbering System

AT	(    )	(    )	- (    )	(    )
	Material	Finish		Type
Product Series	Call Out Grade S Steel C1010, C1110 or C1215 A Aluminum 6061-T6 B Brass 360 or 464 C CRES 304	Call Out Specification 2 CAD Plate per AMS-QQ-P-416, Ty I Class 3 with Clear Protective Coating 3R Plain Zinc per ASTM-B-633, FE/ZN .0003 (8μ) 5 Dull Tin per MIL-T-10727 Ty I .0003 with Clear Protective Coating 9T Tin Zinc Trivalent per ESP-P-004 .0003 (8μ) with Clear Protective Coating	Thread Call Out	Call Out Design Blank Open End 502 Closed End
			Sample Part Number: ATS5-610
* Special order items are subject to minimum order requirements. Contact AVK for details.

The A-T Series™ Insert - Thread Sizes

Thread Size	Thread Call Out	HD ±.005	L ±.015	D Max.	IL Max.	LB ±.015	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
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.

The A-T Series™ Insert - Hole Size / Material Thickness Chart

Installation hole size for the A-T Series™ Insert is determined by the parent material’s thickness and density. The thicker the material the larger the hole required to allow full 360° installation swaging. The application should be tested before hole size is specified.

Thread Size	.030-.090 Mat. Thickness		.091-.124 Mat. Thickness		.125-.186 Mat. Thickness		.187-Over Mat. Thickness
	Drill Size	Decimal	Drill Size	Decimal	Drill Size	Decimal	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		2,31-3,15 Mat. Thickness		3,17-4,72 Mat. Thickness		4,72-Over Mat. Thickness
	Drill Size	Decimal	Drill Size	Decimal	Drill Size	Decimal	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

FINISH:The standard specified finishes for the A-T Series™ Insert are cadmium and tin. Alteration to these finishes will reduce performance.
*THREAD CLASS: The A-T Series™ Insert internal threads are manufactured oversized to compensate for resulting thread portion shrinkage during the installation swaging process. They are not gaugeable prior to or after installation but will be compatible with Class 2A/3A or 6g screws after installation.

AVK Portal Access:

• Technical Sales Questions
• The Stock Room
• The Demo Room