Hex socket flat countersunk head screws fully threaded
BN 21
DIN 7991
(Standard withdrawn)
~ISO 10642
~UNI 5933
| 頭形 |
頭形
埋頭 90°
|
| 穴型 |
穴型
六角穴
|
| 螺紋 |
螺紋
全牙
|
| 材質 |
材質
碳鋼
|
| 強度等級 |
強度等級
010.9 / 10.9 (頭部印記協商決定)
|
| 表面處理 |
表面處理
鍍鋅
|
All features
Standard
DIN 7991 (Standard withdrawn)
~ISO 10642
~UNI 5933
Additional information
Fasteners to the given specification have a reduced loadability due to the head geometry according to ISO 898-1.
The general change-over from DIN 7991 to ISO 10642 in the practice requires a verification of the application.
Features
| 頭形 |
頭形
埋頭 90°
|
| 穴型 |
穴型
六角穴
|
| 螺紋 |
螺紋
全牙
|
| 材質 |
材質
碳鋼
|
| 強度等級 |
強度等級
010.9 / 10.9 (頭部印記協商決定)
|
| 表面處理 |
表面處理
鍍鋅
|
裝配
注意
BN 1422 - DIN 7991 - ~ISO 10642
Hex socket flat countersunk head screws fully threaded - Steel - 010.9 / 10.9 (The head marking is determining) - Zinc flake coated ISO 10683/flZnL/nc/480h/C (µ=0.12-0.18)
BN 2102 - ISO 10642 - ~DIN 7991
Hex socket flat countersunk head screws fully threaded - Steel - 010.9 / 10.9 (The head marking is determining) - zinc plated blue
BN 2103 - ISO 10642 - ~DIN 7991
Hex socket flat countersunk head screws fully threaded - Steel - 010.9 / 10.9 (The head marking is determining) - Zinc flake coated ISO 10683/flZnL/nc/480h/C (µ=0.12-0.18)