Here are the screw information of Sifely S Smart Lock.
| Item | Type | Size | Image |
| STEP2 screw | Cross Head Countersunk Self-Tapping Screw | M4*20(MM) | |
| STEP 3.1 screw | half - tooth screws | M4*25(MM) | |
| STEP 4 screw |
Cross Head Countersunk Screw |
X3 Used for 1-3/8'' (30mm) to 1-3/4 (45mm) Door Thickness M4*30(MM) |
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Cross Head Countersunk Screw |
X3 Used for 1-1/2'' (40mm) to 2-1/4''(55mm) Door Thickness M4*40(MM) |
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| STEP 6 screw | Cross Head Countersunk Screw | M4*16(MM) |
If you have any questions, concerns or feedback; please contact Sifely Customer service via email cs@sifely.com or message us at sifely.com. Our CS team is available from Monday to Sunday 8 am to 5 pm (PST/PDT)
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