Threaded Inserts > Specifications > Tap-Lok® Coarse Series

Tap-Lok® Coarse Series - Key Features:

Coarse external-thread series, brass inserts are designed specifically for use in plastics.

  • Highest pull-out resistance for plastics.
  • Coarse external threads avoid stress cracking in base material.
  • Self-tapping and self-locking.
  • Suitable for thermosetplastics and thermoplastics.
  • Superior vibration resistance.
  • One-step installation.

The widely spaced threads reduce installation torque and provide strong threads for superior pull-out resistance even in brittle plastics.

Cutting slots are self-tapping and self-locking for quick, easy installation and excellent resistance to vibration.

High-quality internal threads are wear resistant. Unified and American Standard, class 2B, or ISO Metric standard, class 6H threads.

This threaded insert is standard as a solid brass bushing. For plastics containing highly abrasive fillers, we recommend regular slotted case-hardened steel inserts.

Photo: Coarse Series


Performance Data*

Internal Thread Size
Effective Shear Area
Pull-Out Resistance (lb)
ABS
Nylon
Phenolic
Polyester
(in)
(metric)
(in)2
(7,500 PSI Shear)
(12,000 PSI Shear)
(9,500 PSI Shear)
(10,400 PSI Shear)
2
2
0.030
140
360
290
310
4
3
0.050
240
600
480
520
6
3.5
0.080
380
960
760
830
8
4
0.110
530
1320
1050
1140
10
5
0.150
1130
1800
1430
1560
1/4
6
0.250
1880
3000
2380
2600

*Representative performance data for regular length. Preproduction prototype testing recommended for your application.


Pull-Out Resistance
Specifications table key:

Tap-Lok specifications diagram

Refer to the 'Specifications' table below for the measurements that correspond to this diagram.

Graph: Pull-Out Resistance


Specifications

Inch Sizes
Metric Sizes
D
L
H
C
Internal Threads
Basic Part Number
Internal Threads
Basic Part Number
Diameter
Length
Recommended Hole Diameter
Counterbore Depth
2-56
C08656-30
M2 x 0.4
C02040-30
0.141
0.187
0.126
0.030
4-40
C11240-30
M3 x 0.5
C03050-30
0.171
0.234
0.150
0.040
6-32
C13832-30
M3.5 x 0.6
C03560-30
0.218
0.281
0.192
0.050
8-32
C16432-30
M4 x 0.7
C04070-30
0.250
0.328
0.224
0.050
10-32
C19032-30
M5 x 0.8
C05080-30
0.296
0.375
0.251
0.055
1/4-20
C25020-30
M6 x 1.0
C06010-30
0.375
0.484
0.333
0.060



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