
Hex Socket Cap Head SEMS Screw with Plain Washer
Cap head, hex socket, plain washer. M2 x 0.4 to M10 x 1.5, 316 stainless.

Image is a rendering of this SEMS screw, made from its data sheet dimensions.
SEMS screw: plain washer held captive under the head. M3 x 0.5 to M6 x 1.0, 316 stainless steel.
A pan head SEMS screw with a cross recess (type Z) and a plain washer held captive under the head. The washer is fitted before the thread is rolled, so it cannot fall off: the screw and washer go in as one part, which saves time on the line and stops loose washers getting lost in equipment.
Made in 316 stainless steel (A4), passivated or chemi-black. Head dimensions to DIN 7985 type Z recess. Sizes M3 x 0.5 to M6 x 1.0.
| Brand | S&G |
|---|---|
| Part no. series | SG-SEMS-PPP |
| Head | Pan head, cross recess (type Z) |
| Washers | Plain washer, held captive |
| Standards | DIN 7985 type Z recess |
| Material | 316 stainless steel (A4) |
| Finish | Passivated or chemi-black |
| Threads | M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0 |
| Units | Metric (class 6g threads) |
| Thread-locking patch | Optional |
Values in mm. D is the plain washer outside diameter, max./min.
| Part no. | Thread T | A head Ø (mm) | B head ht (mm) | C driver no. | D washer Ø (mm) | E (mm) | F (mm) | Standard L1 (mm) |
|---|---|---|---|---|---|---|---|---|
| SG-SEMS-PPP-M3 | M3 x 0.5 | 6.0 | 2.4 | 1 | 7.0/6.7 | 0.5 | 1.25 | 6, 8, 10, 12, 16, 20, 25, 30 |
| SG-SEMS-PPP-M4 | M4 x 0.7 | 8.0 | 3.1 | 2 | 9.0/8.7 | 0.5 | 1.55 | 8, 10, 12, 16, 20, 25, 30 |
| SG-SEMS-PPP-M5 | M5 x 0.8 | 10.0 | 3.8 | 2 | 10.0/9.7 | 0.7 | 1.9 | 10, 12, 16, 20, 25, 30 |
| SG-SEMS-PPP-M6 | M6 x 1.0 | 12.0 | 4.6 | 3 | 12.5/12.1 | 0.7 | 2.2 | 12, 16, 20, 25, 30 |
Quote the part number with the underhead length L1, for example SG-SEMS-PPP-M4 × 16 mm, and the finish: passivated or black. Ask for a thread-locking patch if you need one. Other lengths are made to order.

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