
Concealed Head Standoffs
Threaded standoffs fitted into a blind hole, hidden from the front.

Snap-top standoffs: push the board on, no screw needed.
Clip-on (snap-top) standoffs hold a PCB with a spring clip at the top. Boards push on and pull off without screws, saving assembly time.
Full dimensions, preferred lengths and installation / push-out / torque-out performance data are in the tables below, taken from the self-clinching fasteners catalogue.
| Part numbers | SG-SSS, SG-SSC, SG-SSA |
|---|---|
| Zinc Plated Steel | SG-SSS |
| Stainless Steel | SG-SSC |
| Aluminium | SG-SSA |
| Sheet hardness (SG-SSS) | HRB 60 or less |
All dimensions in mm unless stated. Values from the self-clinching fasteners catalogue. Install into sheet within the hardness limits shown in the specifications.
| Top panel mounting hole diameter | Length code L ±0.13 | A max. | B ±0.13 | C ±0.13 | D ±0.13 | Hole size +0.08 |
|---|---|---|---|---|---|---|
| Metric 4 mm | 8, 10, 12, 14, 16, 18, 20, 22, 25 | 5.39 | 4.78 | 3.58 | 6.35 | 5.4 |
| Type | Steel, zinc | Stainless steel | Aluminium |
|---|---|---|---|
| Installation (kN) | 15.6 | 16.5 | 6.7 |
| Pushout (kN) | 1785 | 1785 | 881 |
| Test sheet material | Steel | Steel | Aluminium |
| Test sheet thickness (mm) | 1.5 | 1.5 | 1.0 |
| Part no. | SG-SSS | SG-SSC | SG-SSA |
|---|---|---|---|
| Panel 1: bottom mounting hole +0.08 | 5.41 | ||
| Panel 1: max. hardness | HRB 60 | HRB 70 | HRB 50 |
| Panel 1: min. thickness | 1.0 | ||
| Panel 1: min. distance to edge of sheet | 6.6 | ||
| Panel 1: max. location tolerance | ±0.13 | ||
| Panel 2: top mounting hole +0.08 | 4.0 | ||
| Panel 2: max. hardness | No limit | ||
| Panel 2: thickness range | 1-1.8 | ||
| Panel 2: min. distance to edge of sheet | 2.54 | ||

Threaded standoffs fitted into a blind hole, hidden from the front.

Closed-end threaded spacers, sealed on one side.

Threaded spacers open at both ends.

Unthreaded spacers for a screw that passes right through.

Standoffs with a locking thread that resists screw loosening.

Keyhole-mount standoffs that slide and lock a board in place.