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塑料用內(nèi)六角花形盤頭自攻螺釘 Q 2A2

選擇規(guī)格尺寸點(diǎn)擊↓

NST 3

NST 3.5

NST 4

NST 5

ST5.5

NST 6

尺寸單位: mm

汽標(biāo)代號(hào)Q 2A2 Q2A2 2A2Q 塑料用內(nèi)六角花形盤頭自攻螺釘

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單重計(jì)算公差

螺紋尺寸
d

NST 3

NST 3.5

NST 4

NST 5

ST5.5

NST 6

d_k	最大值=公稱
	最小值
k	最大值=公稱
	最小值
y	C型
	F型
槽號(hào)
A	參考
t	最大值
	最小值

5.6	7	8	9.5	11	12
5.3	6.64	7.64	9.14	10.57	11.57
2.4	2.6	3.1	3.7	4	4.6
2.15	2.35	2.8	3.4	3.7	4.3
2.3	2.6	3.0	3.7	4.3	4.8
1.9	2.4	2.6	3.6	3.9	4.0
10	15	20	25	25	30
2.8	3.35	3.95	4.5	4.5	5.6
1.27	1.4	1.8	2.03	2.03	2.42
1.01	1.14	1.42	1.65	1.65	2.02

采用標(biāo)準(zhǔn)

技術(shù)條件和引用標(biāo)準(zhǔn)

螺紋
內(nèi)六角花型
機(jī)械性能	材料
	表面
	芯部
	滲碳層深度
	顯微組織
公差	產(chǎn)品等級(jí)
	標(biāo)準(zhǔn)
表面處理	種類
	標(biāo)準(zhǔn)
表面缺陷
驗(yàn)收及包裝

QC/T 713

GB/T 6188

冷鐓鋼、滲碳鋼

≥ 450 HV0.3
試驗(yàn)方法按CB/T 3098.5 的規(guī)定。

螺紋規(guī)格 ≤ NST3.5: 270 HV5~390 HV5；螺紋規(guī)格 ≥ NST4: 270 HV10~390 HV10。
試驗(yàn)方法按GB/T 3098.5 的規(guī)定。

螺紋規(guī)格 ≤ NST3.5: 0.05mm ~0.18mm； NST4 ≤ 螺紋規(guī)格 ≤ NST5.5: 0.10mm~ 0.23mm；
螺紋規(guī)格 = NST6: 0.15mm~0.28rnm。
試驗(yàn)方法按CB/T 3098.5 的規(guī)定，但NST3和NST3.5的自攻螺釘應(yīng)在牙底上進(jìn)行試驗(yàn)。

在滲碳層與芯部間的顯微組織不應(yīng)呈現(xiàn)帶狀亞共析鐵素體。
試驗(yàn)方法按CB/T 3098.5 的規(guī)定。

A級(jí)

GB/T 3103.1

① 鍍鋅鈍化 Fe/Zn8；② 非電解鋅片涂層

QC/T 625

螺紋表面不允許有裂縫、折疊；
螺釘表面不允許有影響使用的裂縫、爆裂、條痕、凹痕、損傷

GB/T 90.1、GB/T 90.2

引用參考

鍍鋅、鍍鎳、鍍鎘、復(fù)合鍍等層鍍層鹽霧腐蝕的防護(hù)性能

GB /T 193 - 2003

普通螺紋（一般用途米制螺紋）- 直徑與螺距系列 (ISO 261: 1998, MOD)

GB /T 5280 - 2002

自攻螺釘用螺紋

注：技術(shù)數(shù)據(jù)僅供參考，請(qǐng)以官方原件為準(zhǔn)！

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