Standard No.:	GB/T 24425.4-2009
English Name:	Prevailing torque type wire thread inserts for blind hole
Chinese Name:	锁紧型盲孔用钢丝螺套
Chinese Classification:	J13    Fastener
Professional Classification:	GB    National Standard
ICS Classification:	21.060.10 21.060.10    Bolts, screws, studs 21.060.10
Issued by:	AQSIQ; SAC
Issued on:	2009-10-15
Implemented on:	2010-3-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	160.00
Delivery:	via email in 1~3 business day

GB/T24425的本部分规定了螺纹公称直径为3mm~12mm、螺距0.5mm~1.75mm 的粗牙系列对称型面锁紧型盲孔用钢丝螺套。
本部分规定的钢丝螺套,旋入GB/T24425.5规定的用于5H 的内螺纹,所形成内螺纹的公差带为5H(GB/T197)。
本部分规定的钢丝螺套适用于提高低强度材料机体(如:铝合金、镁合金、铜合金、铸铁及非金属)螺孔的强度,提高螺钉的疲劳强度,提高锁紧性能,修复损坏的螺孔。