SSZS Screw Studded Inserts
Features
- Self-tapping installation in a variety of materials.
- High pull-out resistance in weak plastics.
- Suitable for applications where jack-out is unavoidable.
General
| Insert Thread | Insert Thread Code | L Insert Length | Insert Length Code | Boss Hole Dia. B | A Head Thickness | C Head Diameter | D Insert Diameter Max. | |
|---|---|---|---|---|---|---|---|---|
| Thermo– plastics +.004 -.000 | Thermo– setting +.004 -.000 | |||||||
| 2-56 | 256 | .236 | 236 | .157-.161 | .161-.169 | .023 | .236 | .177 |
| 4-40 | 440 | .236 | 236 | .157-.161 | .161-.169 | .023 | .236 | .177 |
| 6-32 | 632 | .315 | 315 | .209-.213 | .217-.224 | .029 | .295 | .236 |
| 8-32 | 832 | .315 | 315 | .228-.232 | .236-.244 | .035 | .312 | .256 |
| 10-24 | 1024 | .394 | 394 | .280-.283 | .287-.299 | .042 | .374 | .315 |
| 10-32 | 1032 | .394 | 394 | .280-.283 | .287-.299 | .042 | .374 | .315 |
| 1/4-20 | 2520 | .551 | 551 | .339-.346 | .354-.370 | .052 | .472 | .394 |
| 1/4-28 | 2528 | .551 | 551 | .339-.346 | .354-.370 | .052 | .472 | .394 |
| 5/16-18 | 3118 | .591 | 591 | .417-.425 | .433-.449 | .052 | .551 | .472 |
| 5/16-24 | 3124 | .591 | 591 | .417-.425 | .433-.449 | .052 | .551 | .472 |
| 3/8-16 | 3716 | .709 | 709 | .496-.504 | .512-.528 | .062 | .630 | .551 |
| 3/8-24 | 3724 | .709 | 709 | .496-.504 | .512-.528 | .062 | .630 | .551 |
| 1/2-13 | 5013 | .866 | 866 | .575-.583 | .591-.606 | .062 | .709 | .630 |
| 1/2-20 | 5020 | .866 | 866 | .575-.583 | .591-.606 | .062 | .709 | .630 |
Stud Length
| Stud Thread | Stud Thread Code | D Insert Diameter Max. | S-Stud Length | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| .187 | .250 | .312 | .375 | .437 | .500 | .625 | .750 | .875 | 1.000 | |||
| Stud Length Code | ||||||||||||
| 2-56 | 256 | .177 | 187 | 250 | 312 | — | — | — | — | — | — | — |
| 4-40 | 440 | .177 | 187 | 250 | 312 | 375 | 437 | — | — | — | — | — |
| 6-32 | 632 | .236 | 187 | 250 | 312 | 375 | 437 | 500 | — | — | — | — |
| 8-32 | 832 | .256 | 187 | 250 | 312 | 375 | 437 | 500 | 625 | — | — | — |
| 10-24 | 1024 | .315 | 187 | 250 | 312 | 375 | 437 | 500 | 625 | 750 | — | — |
| 10-32 | 1032 | .315 | 187 | 250 | 312 | 375 | 437 | 500 | 625 | 750 | — | — |
| 1/4-20 | 2520 | .394 | — | 250 | 312 | 375 | 437 | 500 | 625 | 750 | 875 | 1000 |
| 1/4-28 | 2528 | .394 | — | 250 | 312 | 375 | 437 | 500 | 625 | 750 | 875 | 1000 |
| 5/16-18 | 3118 | .472 | — | — | 312 | 375 | 437 | 500 | 625 | 750 | 875 | 1000 |
| 5/16-24 | 3124 | .472 | — | — | 312 | 375 | 437 | 500 | 625 | 750 | 875 | 1000 |
| 3/8-16 | 3716 | .551 | — | — | — | 375 | 437 | 500 | 625 | 750 | 875 | 1000 |
| 3/8-24 | 3724 | .551 | — | — | — | 375 | 437 | 500 | 625 | 750 | 875 | 1000 |
| 1/2-13 | 5013 | .630 | — | — | — | — | — | 500 | 625 | 750 | 875 | 1000 |
| 1/2-20 | 5020 | .630 | — | — | — | — | — | 500 | 625 | 750 | 875 | 1000 |
General
| Insert Thread | Insert Thread Code | L Insert Length | Insert Length Code | Boss Hole Dia. B | A Head Thickness | C Head Diameter | D Insert Diameter Max. | |
| Thermo– plastics +0.10 -0.00 | Thermo– setting +0.10 -0.00 | |||||||
| M2 x 0.4 | M2 | 6.00 | 6.00 | 4.00-4.10 | 4.10-4.30 | 0.58 | 6.00 | 4.50 |
| M2.5 x 0.45 | M2.5 | 6.00 | 6.00 | 4.00-4.10 | 4.10-4.30 | 0.58 | 6.00 | 4.50 |
| M3 x 0.5 | M3 | 6.00 | 6.00 | 4.50-4.60 | 4.60-4.80 | 0.58 | 6.50 | 5.00 |
| M3.5 x 0.6 | M3.5 | 8.00 | 8.00 | 5.30-5.40 | 5.50-5.70 | 0.73 | 7.50 | 6.00 |
| M4 x 0.7 | M4 | 8.00 | 8.00 | 5.80-5.90 | 6.00-6.20 | 0.89 | 8.00 | 6.50 |
| M5 x 0.8 | M5 | 10.00 | 10.00 | 7.10-7.20 | 7.30-7.60 | 1.06 | 9.50 | 8.00 |
| M6 x 1.0 | M6 | 14.00 | 14.00 | 8.60-8.80 | 9.00-9.40 | 1.32 | 12.00 | 10.00 |
| M8 x 1.25 | M8 | 15.00 | 15.00 | 10.60-10.80 | 11.00-11.40 | 1.32 | 14.00 | 12.00 |
| M10 x 1.5 | M10 | 18.00 | 18.00 | 12.60-12.80 | 13.00-13.40 | 1.57 | 16.00 | 14.00 |
| M12 x 1.75 | M12 | 22.00 | 22.00 | 14.60-14.80 | 15.00-15.40 | 1.57 | 18.00 | 16.0 |
(1) All dimensions are in millimeters and reference unless toleranced. (2) North State Fastener recommends determining the minimum hole wall thickness through testing in the application.
Stud Length
| Stud Thread | Stud Thread Code | D Insert Diameter Max. | S-Stud Length | |||||||||
| 5.00 | 6.00 | 8.00 | 10.00 | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 | |||
| Stud Length Code | ||||||||||||
| M2 x 0.4 | M2 | 4.50 | 5.00 | 6.00 | 8.00 | — | — | — | — | — | — | — |
| M2.5 x 0.45 | M2.5 | 4.50 | 5.00 | 6.00 | 8.00 | 10.00 | — | — | — | — | — | — |
| M3 x 0.5 | M3 | 5.00 | 5.00 | 6.00 | 8.00 | 10.00 | 12.00 | — | — | — | — | — |
| M3.5 x 0.6 | M3.5 | 6.00 | 5.00 | 6.00 | 8.00 | 10.00 | 12.00 | 14.00 | — | — | — | — |
| M4 x 0.7 | M4 | 6.50 | 5.00 | 6.00 | 8.00 | 10.00 | 12.00 | 14.00 | 16.00 | — | — | — |
| M5 x 0.8 | M5 | 8.00 | 5.00 | 6.00 | 8.00 | 10.00 | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | — |
| M6 x 1.0 | M6 | 10.00 | — | 6.00 | 8.00 | 10.00 | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 |
| M8 x 1.25 | M8 | 12.00 | — | — | 8.00 | 10.00 | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 |
| M10 x 1.5 | M10 | 14.00 | — | — | — | 10.00 | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 |
| M12 x 1.75 | M12 | 16.00 | — | — | — | — | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 |
(1) All dimensions are in millimeters and reference unless toleranced. (2) Custom stud lengths available by request.
Boss Design Recommendation
The SSZ Screw Zert is designed to be installed into a straight hole with a 1°inclusive taper. The recommended hole size applies at the point reached by the bottom of the insert. Molded holes should be used wherever possible as drilled holes may result in diminished performance. North State Fastener recommends a 60°countersink, with a depth equal to the external thread pitch of the insert being used, at the top of the hole to prevent chipping of the surrounding boss hole surface. Hole diameters are dependant on the type of plastic being used with harder plastics requiring larger holes than softer plastics, for example. Diameter ranges shown in the tables are those recommended for thermoplastics and thermosetting plastics with the exact hole size determined through testing in the application.
Installation
The slot in the insert acts as a thread cutting edge. Inserts are installed following standard tapping procedures using hand tools or conventional tapping equipment.