A-T Logo A-T Insert

The A-T Series™ is designed for applications where minimal backside thread protrusion is required.

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.

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.

 

JOINT DESIGN PRACTICES

AVK recommends that the mating part comes in contact with the head of the A-T Series™ Insert. If a gap or clearance hole exists between the mating part and the A-T Series™ Insert, the threaded nut portion may rotate or pull through the parent material.

The A-T Series™ Insert - Various Design Types

A-T Closed End Insert 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.
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