Qingdao Haorui Steel Products Co., Ltd.
Mob: 15966945003
Contact: Yanan Wang
Tel: 0532-87881070
Fax: 0532-87980111
Email: wang@qdhaorui.com
Add: No. 375, Zhengyang East Road, Xifu Town, Chengyang District, Qingdao
What are the classifications of screw products?
There are several categories of bolts:
(1), hexagonal bolts (HEXAGON HEAD BOLTS)
1. The reference standard for inch bolts is ANSI/ASME B18.2.1, and the Japanese standard refers to JIS B1180 (Webster teeth). The imperial system refers to BSW916 (Webster's teeth).
(1), HEX MACHINE BOLT: without washer, with beam tail, half tooth hexagon bolt,
(2), HEX TAP BOLT: no washer, no beam tail, full tooth hexagon bolt,
(3), HEX CAP SCREWS: with washer, with beam tail, half tooth hexagon bolt,
2. The reference standards for metric bolts are as follows, and their differences are shown in the table:
old national standard | new national standard | ISO standard | DIN (German Standard) |
GB30 | GB5780 (half tooth) GB5781 (full tooth) GB5782 (half tooth) GB5783 (full tooth) | ISO4016 ISO4018 ISO4014 ISO4017 | DIN601 DIN558 DIN931 DIN933 |
(2) Carriage Bolts/Carriage Bolts:
ANSI/ASME B18.5; DIN603; ISO 8677; GB12; GB14
(3) Hexagon socket-head cap screws:
DIN912; GB70; ISO4762; ANSI/ASME B18.3
(4) Hexagon Head Lag Screws:
ANSI/ASME B18.2.1 DIN 571
(5) Furniture screws: according to customer standards
(6) Hexagon Flange Bolt:
IFI 111 GB 5787 DIN 921
