1/4 สกรูหัวจมดำ
ความยาวสกรู นิ้ว
หมวดหมู่ : สกรูหัวจมดำ ,  น๊อต สกรู ,  เหล็กดำ 8.8,10.9,12.9 , 
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Size | 3/16 BSW | 1/4 BSW / NC | 5/16 BSW / NC | 3/8 BSW / NC | 1/2 BSW /NC | 5/8 BSW / NC | 3/4 BSW / NC | 7/8 NC | 1'' NC | ||
pitch | 24 | 20 | 18 | 16 | 12 / 13 | 11 | 10 | 9 | 8 | ||
Length | |||||||||||
3/8 | |||||||||||
1/2 | / | / | / | / | |||||||
5/8 | / | / | / | ||||||||
3/4 | / | / | / | / | |||||||
1'' | / | / | / | / | / | ||||||
1.1/4 | / | / | / | / | / | ||||||
1.1/2 | / | / | / | / | / | / | / | ||||
2'' | / | / | / | / | / | / | |||||
2.1/2 | / | / | / | / | / | / | |||||
3'' | / | / | / | / | / | / | |||||
3.1/2 | / | / | / | ||||||||
4'' | / | / | / | ||||||||
4.1/2 | / | / | |||||||||
5'' | / | / | |||||||||
5.1/2 | / | / | |||||||||
6'' | / | / |