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A-H Logo A-H Insert
The A-H Series™ provides exceptional spin out resistance in punched hex holes and is recommended for use with mating thread-locking fasteners.

A-H Series™ Threaded Hex Insert features a radius corner hex body. When installed into a corresponding hex hole, the radius corners of the A-H Insert expand and fill the hole corners providing exceptional resistance to spinning in the panel. The A-H Series™ is designed to be used with Grade 5 or Metric Class 8.8/9.8 mating screws.

A-H Series™ Threaded Hex Insert can be installed using AVK’s ARO brand Pneumatic Tools or AVK’s SPP™ Pneumatic/Hydraulic Tools. These tools can be located at any position on your assembly line. The A-H Insert can be installed either before or after finish.

The A-H Series™ Insert - Design Benefits

EXCEPTIONAL resistance to spinning in the panel is achieved as the A-H Series™ hex body expands FILLING THE HOLE
AVOID STRESS FRACTURES of your material and prolong punch and die life by specifying a radius corner in your hex hole. This is possible when using the A-H Series™ radius hex body insert.
QUALITY INSTALLATIONS even in variable thickness materials are assured by AVK’s spin/spin ARO Pneumatic Tools and our SPP™ Pneumatic/Hydraulic Tools.
SUPERIOR CORROSION RESISTANCE is provided by our standard zinc/yellow dichromate finish (96 hrs. salt spray to white corrosion). For exceptional corrosion protection we offer a tin/zinc alloy finish.
THREADS GAUGE before and after installation due to the increased cross-sectional thickness of the thread area. Thread dilation is prevented.
INVENTORY REDUCTION is possible because of the A-H Series™ wide grip range capacity. It is 2.5 times greater than conventional rivet nuts.
SUPERIOR THREAD STRENGTH is provided due to our internal rolled thread manufacturing process.
AVAILABLE IN STEEL.

SPINWALL TECHNOLOGY™
HOW HOLE FILL WORKS FOR YOU
As the A-H Series™ is installed, the radius cornered hex body expands FILLING THE HOLE. This feature provides exceptional torque strength and vibration resistance. The installation tool then continues to install the insert forming a backside flange even in multiple or variable thickness materials —WITHOUT ADJUSTMENT.

The A-H Series™ Insert - Installation Steps & Video

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Step 1
The operator 1/4 turns the AVK fastener on to the tool mandrel and places it into the hole. He then presses the top trigger on the tool and the AVK part installs.

Step 2
Once hole fill is complete the AVK fastener forms its backside flange behind the parent material and the tool stalls.

Step 3
The operator reverses the tool and proceeds to attach the mating component using the appropriate mating hardware. The entire installation sequence of the AVK fastener takes 3 seconds or less.

Notes:
In this demo video the operator is installing the AVK fastener into two different material thickness’. This is the key benefit of the AVK System. You are able to install our products into single, variable or multiple thickness materials without tool adjustment.

During installation the AVK fastener expands within the hole Filling The Hole. This assures excellent spin out resistance and is a feature unique to AVK fasteners.

AVK fasteners are designed to be installed right on your assembly line either before or after paint or finish is applied to your product. This saves space and improves process flow.

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The A-H Series™ Insert - Various Design Types

CLOSED END

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

 SEALED HEAD

A PVC foam seal is bonded to the underside of the head and when installed provides a weathertight seal. Also available in the closed end version.

The A-H Series™ Insert - Part Numbering System

AH (    ) (    ) - (    ) - (    ) (    )
Material
Finish
Type
Product
Series
Call
Out 		Grade
S Steel 1010/1008
Call
Out 		Specification
4 Steel - Zinc/Yellow Dichromate per ASTM-B-633 Type II FE/ZN .0003 (8μ) with Clear Protective Coating
* By Special Order
9 Steel - Yellow Tin Zinc per BPS-TZ-327 .0003 (8μ) with Clear Protective Coating
Thread
Call Out
Grip
Call Out
Call
Out 		Type
blank Open End
B Closed End
* By Special Order
S Sealed
Sample Part Number:
AHS4-420-165
* Special order items are subject to minimum order requirements. Contact AVK for details.

The A-H Series™ Insert - Thread Sizes


Unified (Inch) and Metric Thread Sizes
Thread
Size		 Thread
Call Out		 Grip
Range		 Grip
Call Out		 Hole Size
(across flats)
+.004 -.000		 HD
±.010
±0.25*		 HH
±.003		 L
±.015		 D
Max.		 IL
Max.		 LB
±.015		 ILB
Max		 IATD**
Max.		 R
Max.
6-32 UNC 632 .020-.080 80 .250 .375 .027 .385 .249 .295 .740 .640 .575 .015
6-32 UNC 632 .080-.130 130 .250 .375 .027 .435 .249 .295 .740 .580 .640 .015
8-32 UNC 832 .020-.080 80 .250 .375 .027 .385 .249 .295 .740 .640 .575 .015
8-32 UNC 832 .080-.130 130 .250 .375 .027 .435 .249 .295 .740 .580 .640 .015
10-24 UNC 1024 .020-.130 130 .281 .390 .027 .435 .280 .275 1.030 .845 .695 .020
10-24 UNC 1024 .130-.225 225 .281 .390 .027 .535 .280 .275 1.030 .735 .805 .020
10-32 UNF 1032 .020-.130 130 .281 .390 .027 .435 .280 .275 1.030 .845 .695 .020
10-32 UNF 1032 .130-.225 225 .281 .390 .027 .535 .280 .275 1.030 .735 .805 .020
1/4-20 UNC 420 .027-.165 165 .375 .510 .030 .585 .374 .400 1.190 1.015 .945 .040
1/4-20 UNC 420 .165-.260 260 .375 .510 .030 .685 .374 .400 1.190 .915 1.085 .040
5/16-18 UNC 518 .027-.150 150 .500 .655* .035 .685 .499 .530 1.445 1.235 1.045 .040
5/16-18 UNC 518 .150-.312 312 .500 .655* .035 .845 .499 .515 1.445 1.220 1.170 .040
3/8-16 UNC 616 .027-.150 150 .500 .655* .035 .685 .499 .530 1.445 1.235 1.045 .040
3/8-16 UNC 616 .150-.312 312 .500 .655* .035 .845 .499 .515 1.445 1.220 1.170 .040
 
Thread
Size		 Thread
Call Out		 Grip
Range		 Grip
Call Out		 Hole Size
(across flats)
+0,10 -0,00		 HD
±0,25
±0,64*		 HH
±0,08		 L
±0,38		 D
Max.		 IL
Max.		 LB
±0,38		 ILB
Max		 IATD**
Max.		 R
Max.
M4 x 0,7 ISO 470 0,50-2,00 2.0 6,35 9,53 0,68 9,78 6,35 7,49 18,80 16,26 14,61 ,38
M4 x 0,7 ISO 470 2,00-3,30 3.3 6,35 9,53 0,68 11,05 6,35 7,49 18,80 14,73 16,26 ,38
M5 x 0,8 ISO 580 0,50-3,30 3.3 7,14 9,91 0,68 11,05 7,10 6,99 26,16 21,46 17,65 ,50
M5 x 0,8 ISO 580 3,30-5,70 5.7 7,14 9,91 0,68 13,59 7,10 6,99 26,16 18,67 20,45 ,50
M6 x 1,0 ISO 610 0,70-4,20 4.2 9,53 12,96 0,76 14,86 9,50 10,16 30,23 25,78 24,00 1,0
M6 x 1,0 ISO 610 4,20-6,60 6.6 9,53 12,96 0,76 17,40 9,50 10,16 30,23 23,24 27,56 1,0
M8 x 1,25 ISO 8125 0,70-3,8 3.8 12,70 16,64* 0,89 17,40 12,70 13,46 36,70 31,37 26,54 1,0
M8 x 1,25 ISO 8125 3,8-7,90 7.9 12,70 16,64* 0,89 21,46 12,70 13,08 36,70 30,99 29,72 1,0
M10 x 1,5 ISO 1015 0,70-3,8 3.8 12,70 16,64* 0,89 17,40 12,70 13,46 36,70 31,37 26,54 1,0
M10 x 1,5 ISO 1015 3,8-7,90 7.9 12,70 16,64* 0,89 21,46 12,70 13,08 36,70 30,99 29,72 1,0

NOTE 1: Grip range can be affected by parent material density and actual hole size.
AVK suggests trial installations to determine optimum grip.
NOTE 2: Available in additional materials and sizes. Contact AVK for details.
**Dimensions in minimum grip condition.