Cross small pan head machine screw 304
GB823
Diameter range: M1.6-M8 Length range: 2.5mm-100mm
| Grade | A2-50 |
|---|---|
| standard | GB national standard |
| head shape | small pantou |
| Groove | Cross recess |
| Material | 304 |
| Surface | whitewash |
| Thread | Fully threaded |
| Thread size d | M2 | M2.5 | M3 | (M3.5) | M4 | M5 | M6 | M8 |
|---|---|---|---|---|---|---|---|---|
| p pitch | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.25 |
| amaximum | 0.8 | 0.9 | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 |
| dk max = nominal | 3.5 | 4.5 | 5.5 | 6 | 7 | 9 | 10.5 | 14 |
| dk minimum | 3.2 | 4.2 | 5.2 | 5.7 | 6.64 | 8.64 | 10.07 | 13.57 |
| kmax = nominal | 1.4 | 1.8 | 2.15 | 2.45 | 2.75 | 3.45 | 4.1 | 5.4 |
| kminimum | 1.26 | 1.66 | 2.01 | 2.31 | 2.61 | 3.27 | 3.8 | 5.1 |
| rminimum | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 |
| R≈ | 4.5 | 6 | 7 | 8 | 9 | 12 | 14 | 18 |
| xmax | 1 | 1.1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3.2 |
| slot number | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 |
| m≈ | 2.2 | 2.6 | 3.5 | 3.8 | 4.1 | 4.8 | 6.2 | 7.7 |
| depth max | 1.01 | 1.42 | 1.43 | 1.73 | 2.03 | 2.73 | 2.86 | 4.36 |
| depth minimum | 0.6 | 1 | 0.86 | 1.15 | 1.45 | 2.14 | 2.26 | 3.73 |
| steel | Stainless steel | ||
| General technical conditions | GB/T 16938 | ||
| Thread | tolerance | 6g | |
| standard | GB/T 193、GB/T 9145 | ||
| Mechanical properties | Performance level | d＜3mm: according to the agreement; | C4-50、A1-50 |
| d≥3mm: 4.8 | |||
| standard | d＜3mm: according to the agreement; | GB/T 3098.6 | |
| d≥3mm：GB/T 3098.1 | |||
| tolerance | Product grade | A | |
| standard | GB/T 3103.1 | ||
| Cross recess | GB/T 944.1 | ||
| surface defects | GB/T 5779.1 | - | |
| surface treatment | Without treatment; | Simple handling; | |
| Electroplating technical requirements shall comply with GB/T 5267.1; | Passivation treatment technical requirements according to GB/T 5267.4 | ||
| Technical requirements for non-electrolytic zinc flake coating according to GB/T 5267.2 | |||
| If other technical requirements or surface treatment are required, it should be agreed upon by the supplier and the buyer. | |||
| Acceptance and packaging | GB/T 90.1、GB/T 90.2 | ||
