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十字槽沉头自攻螺钉 DIN EN ISO 7050 - 2011

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ST2.2

ST2.9

ST3.5

ST4.2

ST4.8

ST5.5

ST6.3

ST8

ST9.5

DIN EN ISO  7050 - 2011 十字槽沉头自攻螺钉

尺寸单位: mm
德标DIN EN ISO 7050 - 2011 DIN EN ISO7050  十字槽沉头自攻螺钉
德标DIN EN ISO 7050 - 2011 DIN EN ISO7050  十字槽沉头自攻螺钉
DIN EN ISO  7050 - 2011 十字槽沉头自攻螺钉
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螺纹规格
ST2.2 ST2.9 ST3.5 ST4.2 ST4.8 ST5.5 ST6.3 ST8 ST9.5
P 螺距
a 最大值
dk 最大值
最小值
k 最大值
槽号
M1 H型
深度 H型 最大值
最小值
M2 Z型
深度 Z型 最大值
最小值
y 参考值 C型
F型
R型
0.8 1.1 1.3 1.4 1.6 1.8 1.8 2.1 2.1
1.6 2.2 2.6 2.8 3.2 3.6 3.6 4.2 4.2
3.8 5.5 7.3 8.4 9.3 10.3 11.3 15.8 18.3
3.5 5.2 6.9 8 8.9 9.9 10.9 15.4 17.8
1.1 1.7 2.35 2.6 2.8 3 3.15 4.65 5.25
0 1 2 2 2 3 3 4 4
1.9 3.2 4.4 4.6 5.2 6.6 6.8 8.9 10
1.2 2.1 2.4 2.6 3.2 3.3 3.5 4.6 5.7
0.9 1.7 1.9 2.1 2.7 2.8 3 4 5.1
2 3 4.1 4.4 4.9 6.3 6.6 8.8 9.8
1.2 2.01 2.2 2.51 3.05 3.18 3.45 4.6 5.64
0.95 1.76 1.75 2.06 2.6 2.73 3 4.15 5.19
2.0 2.6 3.2 3.7 4.3 5.0 6.0 7.5 8.0
1.6 2.1 2.5 2.8 3.2 3.6 3.6 4.2 4.2
/ / 2.7 3.2 3.6 4.3 5.0 6.3 /
①,材料:
a)钢—冷镦、表面硬化的优质钢,按ISO 2702
b)不锈钢,性能等级:A2-20H, A4-20H, A5-20H; 按ISO 3506-4
替代列表
等效标准
国标 GB 国际 ISO 德标 DIN 意大利 UNI
GB /T 846
ISO 7050
DIN EN ISO 7050
UNI 6955
以上有部分标准可能为近似等效,如有异议以标准原件为准

技术条件和引用标准

材料
通用技术条件
螺纹
十字槽
机械性能 等级
标准
公差 产品等级
标准
表面处理
验收及包装
钢(ISO 2702) 不锈钢
ISO 8992
ISO 1478
ISO 4757,ISO 7721-2
/ A2-20H,A4-20H,A5-20H
ISO 2702 ISO 3506-4
A
ISO 4759-1
不经处理;
电镀技术要求按 ISO 4042;
非电解锌片涂层技术要求按 ISO 10683;
如需其他技术要求或表面处理,应由供需协议
不经处理;
钝化处理技术要求按 ISO 16048
ISO 3269
注:技术数据仅供参考,请以官方原件为准!
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材料:302HQ, 304 (A2-70), 316C (A4-70, A4-80), 410, 430,公称直径:2.9-6.3 长度6.5-100mm
联系人:汤继勇 点击这里给我发消息546348066   移动电话: 15298892886     电话:0512-66700967 Email: 登陆后可见
材质:不锈钢、碳钢;公称直径范围:M1-M14;公称长度范围:5-400mm
联系人:刘小姐   移动电话: 13925805160     电话:0752-6860202/6860303 Email: 登陆后可见
材质:不锈钢SUS410、SUS304、SUS316、1022碳钢等;公称直径:ST2.9-ST6.3;公称长度:9.5—300mm;表面处理:镀锌、镀镍、达克罗等可按客户需求;支持非标定制。
类似标准及供货信息
1 十字槽沉头自攻钉 [国标]
GB /T 846 - 2017
十字槽沉头自攻钉
Cross Recessed Countersunk Head Tapping Screws
供应商(7)
2 十字槽沉头自攻钉 [国标]
GB /T 846 - 1985
十字槽沉头自攻钉
Cross Recessed Countersunk Head Tapping Screws
供应商(7)
3 十字槽沉头自攻螺钉 [国标]
GB 846 - 1976
十字槽沉头自攻螺钉
Cross recessed countersunk head self-tapping screws
供应商(7)
4 十字槽沉头自攻钉 [德标]
DIN 7982 - 1990
十字槽沉头自攻钉
Cross recessed countersunk head tapping screws
供应商(3)
5 十字槽沉头自攻螺钉 [国际]
ISO 7050 - 2011
十字槽沉头自攻螺钉
Cross Recessed Countersunk (Flat) Head Tapping Screws
供应商(1)
6 十字槽沉头自攻螺钉 [国际]
ISO 7050 - 1983
十字槽沉头自攻螺钉
Cross recessed countersunk head tapping screws
供应商(1)
7 十字槽喇叭头自攻钉 [日标]
JIS B 1125 - 2015
十字槽喇叭头自攻钉
Cross Recessed Trumpet Head Self Drilling Tapping Screw
8 十字槽沉头带筋自攻钉 [日标]
JIS B 1125 - 2015
十字槽沉头带筋自攻钉
Flex. Purpose Drilling Tapping Screws
9 十字槽喇叭头自攻钉 [日标]
JIS B 1125 - 2003
十字槽喇叭头自攻钉
cross recessed trumpet head self drilling tapping screw
10 十字槽沉头带筋自攻钉 [日标]
JIS B 1125 - 2003
十字槽沉头带筋自攻钉
Cross recessed ribbed countersunk head tapping screws
11 十字槽沉头自攻钉 - 螺纹型式:Class 1~Class 4【附表2】 [日标]
JIS B 1122 (AAT2) - 1996
十字槽沉头自攻钉 - 螺纹型式:Class 1~Class 4【附表2】
Cross Recessed Countersunk Head Tapping Screws - threaded portion are of class 1 to 4 [Annex attached table 2]
12 十字槽沉头自攻钉 【表2】 [日标]
JIS B 1122 (AT2) - 1996
十字槽沉头自攻钉 【表2】
Cross recessed countersunk head tapping screws [Table 2]
13 十字槽喇叭头自攻钉 [日标]
JIS B 1125 - 1995
十字槽喇叭头自攻钉
Cross recessed bugle head self-drilling tapping screws
14 十字槽沉头自攻螺钉 C型 [汽标代号]
Q 274
十字槽沉头自攻螺钉 C型
Cross recessed countersunk head tapping screws - Type C
15 十字槽沉头自攻螺钉 F型 [汽标代号]
Q 278
十字槽沉头自攻螺钉 F型
Cross recessed countersunk head tapping screws - Type F
16 80°十字槽沉头自攻钉 [美标]
ASME/ANSI B 18.6.3 - 2010
80°十字槽沉头自攻钉
80° Machine Screw and Tapping Screw Nuts (Inch Seires)
17 塑料用双螺纹十字槽沉头(平头)自攻螺钉 [意大利]
UNI 9709 - 1990
塑料用双螺纹十字槽沉头(平头)自攻螺钉
Two-thread countersunk (flat) head tapping screws with cross rocessed for plastics
18 十字槽沉头自攻钉 [意大利]
UNI 6955
十字槽沉头自攻钉
Cross-Recessed Flat Countersunk Head Tapping Screws
19 十字槽沉头自攻螺钉 [法国]
NF E 25-656 - 1994
十字槽沉头自攻螺钉
Cross Recessed Countersunk (Flat) Head Tapping Screws
20 米字槽80°沉头自攻钉  [Table 9] [英标]
BS 4174 - 1972
米字槽80°沉头自攻钉 [Table 9]
Recess 80°countersunk Head Screws - Type Z [Table 9]
21 米字槽80°沉头清根自攻钉 [Table 11] [英标]
BS 4174 - 1972
米字槽80°沉头清根自攻钉 [Table 11]
Recess 80°Truncated Countersunk Head Screws - Type Z [Table 11]
22 米制十字槽沉头自攻螺钉 [澳标]
AS /NZS 4407 - 1996
米制十字槽沉头自攻螺钉
ISO metric cross recessed countersunk head tapping screws
23 十字槽沉头自攻钉 [原电子工业部]
SJ 2822 - 1987
十字槽沉头自攻钉

24 十字槽沉头自攻钉 [原电子工业部]
SJ 2498 - 1984
十字槽沉头自攻钉

25 十字槽沉头自攻螺钉 [韩标]
KS B 1032 - 2016 (R2021)
十字槽沉头自攻螺钉
Cross-Recessed Countersunk (Flat) Head Tapping Screws
26 十字槽沉头自攻螺钉 [韩标]
KS B 1032 - 2001
十字槽沉头自攻螺钉
Cross-Recessed Countersunk (Flat) Head Tapping Screws
27 十字槽沉头自攻螺钉 [企标]
YJT 4058 (WN1413C)
十字槽沉头自攻螺钉
Cross recessed countersunk head Tapping screws
供应商(1)
28 十字槽82度沉头AB ABR自攻螺钉 [美标]
ASME B 18.6.3 (H1B-I/H1B-IA+T1A) - 2024
十字槽82度沉头AB ABR自攻螺钉
82° Cross Recessed Countersunk Head Tapping Screws - Type AB (ABR)
29 十字槽82°沉头清根 AB ABR自攻螺钉 [美标]
ASME B 18.6.3 (H3B-I/H3B-IA+T1A) - 2024
十字槽82°沉头清根 AB ABR自攻螺钉
Undercut 82-deg Flat Countersunk Head Tapping Screws - Type AB (ABR)
30 十字槽小沉头 AB ABR自攻螺钉 [美标]
ASME B 18.6.3 (H4B-I/H4B-IA+T1A) - 2024
十字槽小沉头 AB ABR自攻螺钉
Flat Coutersunk Trim Head Tapping Screws - Type AB and ABR
31 十字槽82度沉头AB ABR自攻螺钉 [美标]
ASME B 18.6.3 (T2-I/T2-IA+T40) - 2013
十字槽82度沉头AB ABR自攻螺钉
82° Cross Recessed Countersunk Head Tapping Screws - Type AB (ABR)
32 十字槽82°沉头清根 AB ABR自攻螺钉 [美标]
ASME B 18.6.3 (T10-I/T10-IA+T40) - 2013
十字槽82°沉头清根 AB ABR自攻螺钉
Undercut 82-deg Flat Countersunk Head Tapping Screws - Type AB (ABR)
33 十字槽小沉头 AB ABR自攻螺钉 [美标]
ASME B 18.6.3 (T14-I/T14-IA+T40) - 2013
十字槽小沉头 AB ABR自攻螺钉
Flat Coutersunk Trim Head Tapping Screws - Type AB and ABR
34 米制米字槽沉头自攻螺钉 [Table 10] [美标]
ASME B 18.6.5M (T10) - 2000 (R2010)
米制米字槽沉头自攻螺钉 [Table 10]
Metric Type IA Cross-Recessed Flat Countersunk Head Tapping Screws [Table 10]
35 米制十字槽沉头自攻螺钉 [Table 9] [美标]
ASME B 18.6.5M (T9) - 2000 (R2010)
米制十字槽沉头自攻螺钉 [Table 9]
Metric cross recessed countersunk head tapping screws [Table 9]
36 I型十字槽沉头自攻螺钉 A型 [Table 10] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头自攻螺钉 A型 [Table 10]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type A Thread Forming [Table 10]
37 I型十字槽沉头自攻螺钉 B, BP型 [Table 10] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头自攻螺钉 B, BP型 [Table 10]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 10]
38 I型十字槽沉头自攻螺钉 C型 (统一螺纹) [Table 10] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头自攻螺钉 C型 (统一螺纹) [Table 10]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 10]
39 I型十字槽沉头自攻螺钉 AB型 [Table 10] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头自攻螺钉 AB型 [Table 10]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 10]
40 IA型米字槽沉头自攻螺钉 A型  [Table 11] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头自攻螺钉 A型 [Table 11]
Type IA Cross Recessed Flat Countersunk Head Tapping Screws - Type A Thread Forming [Table 11]
41 IA型米字槽沉头自攻螺钉 B,BP型 [Table 11] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头自攻螺钉 B,BP型 [Table 11]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 11]
42 IA型米字槽沉头自攻螺钉 C型(统一螺纹) [Table 11] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头自攻螺钉 C型(统一螺纹) [Table 11]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 11]
43 IA型米字槽沉头自攻螺钉 AB型 [Table 11] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头自攻螺钉 AB型 [Table 11]
Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 11]
44 II型十字槽沉头自攻螺钉 A型 [Table 12] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头自攻螺钉 A型 [Table 12]
Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type A Thread Forming [Table 12]
45 II型十字槽沉头自攻螺钉 B,BP型 [Table 12] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头自攻螺钉 B,BP型 [Table 12]
Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 12]
46 II型十字槽沉头自攻螺钉 C型(统一螺纹) [Table 12] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头自攻螺钉 C型(统一螺纹) [Table 12]
Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 12]
47 II型十字槽沉头自攻螺钉 AB型 [Table 12] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头自攻螺钉 AB型 [Table 12]
Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 12]
48 I型十字槽沉头清根自攻螺钉 B,BP型 [Table 14] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头清根自攻螺钉 B,BP型 [Table 14]
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 14]
49 I型十字槽沉头清根自攻螺钉 C型(统一螺纹) [Table 14] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头清根自攻螺钉 C型(统一螺纹) [Table 14]
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 14]
50 I型十字槽沉头清根自攻螺钉 AB型 [Table 14] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头清根自攻螺钉 AB型 [Table 14]
Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 14]
51 IA型米字槽沉头清根自攻螺钉 B,BP型 [Table 15] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头清根自攻螺钉 B,BP型 [Table 15]
Type IA Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 15]
52 IA型米字槽沉头清根自攻螺钉 C型(统一螺纹) [Table 15] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头清根自攻螺钉 C型(统一螺纹) [Table 15]
Type IA Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 15]
53 IA型米字槽沉头清根自攻螺钉 AB型 [Table 15] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽沉头清根自攻螺钉 AB型 [Table 15]
Type IA Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 15]
54 II型十字槽沉头清根自攻螺钉 B,BP型 [Table 16] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头清根自攻螺钉 B,BP型 [Table 16]
Type II Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 16]
55 II型十字槽沉头清根自攻螺钉 C型(统一螺纹) [Table 16] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头清根自攻螺钉 C型(统一螺纹) [Table 16]
Type II Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 16]
56 II型十字槽沉头清根自攻螺钉 AB型 [Table 16] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头清根自攻螺钉 AB型 [Table 16]
Type II Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 16]
57 I型十字槽沉头精整自攻螺钉,B,BP型 [Table 17] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头精整自攻螺钉,B,BP型 [Table 17]
Type I Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type B and BP Thread Forming [Table 17]
58 I型十字槽沉头精整自攻螺钉,C型(统一螺纹) [Table 17] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头精整自攻螺钉,C型(统一螺纹) [Table 17]
Type I Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type C Thread Forming [Table 17]
59 I型十字槽沉头精整自攻螺钉,AB型 [Table 17] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头精整自攻螺钉,AB型 [Table 17]
Type I Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type AB Thread Forming [Table 17]
60 I型十字槽沉头精整自攻螺钉,A型 [Table 17] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽沉头精整自攻螺钉,A型 [Table 17]
Type I Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type A Thread Forming [Table 17]
61 IA型十字槽沉头精整自攻螺钉 B,BP型 [Table 18] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型十字槽沉头精整自攻螺钉 B,BP型 [Table 18]
Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type B and BP Thread Forming [Table 18]
62 IA型十字槽沉头精整自攻螺钉 C型(统一螺纹) [Table 18] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型十字槽沉头精整自攻螺钉 C型(统一螺纹) [Table 18]
Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type C Thread Forming [Table 18]
63 IA型十字槽沉头精整自攻螺钉 AB型 [Table 18] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型十字槽沉头精整自攻螺钉 AB型 [Table 18]
Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type AB Thread Forming [Table 18]
64 IA型十字槽沉头精整自攻螺钉 A型 [Table 18] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型十字槽沉头精整自攻螺钉 A型 [Table 18]
Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type A Thread Forming [Table 18]
65 II型十字槽沉头精整自攻螺钉 B,BP型 [Table 19] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头精整自攻螺钉 B,BP型 [Table 19]
Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type B and BP Thread Forming [Table 19]
66 II型十字槽沉头精整自攻螺钉 C型(统一螺纹) [Table 19] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头精整自攻螺钉 C型(统一螺纹) [Table 19]
Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type C Thread Forming [Table 19]
67 II型十字槽沉头精整自攻螺钉 AB型 [Table 19] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头精整自攻螺钉 AB型 [Table 19]
Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type AB Thread Forming [Table 19]
68 II型十字槽沉头精整自攻螺钉 A型 [Table 19] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽沉头精整自攻螺钉 A型 [Table 19]
Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type A Thread Forming [Table 19]
69 I型十字槽100°沉头自攻螺钉 B,BP型 [Table VI2] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽100°沉头自攻螺钉 B,BP型 [Table VI2]
Type I Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI2]
70 I型十字槽100°沉头自攻螺钉 AB型 [Table VI2] [美标]
ASME B 18.6.4 - 1998 (R2005)
I型十字槽100°沉头自攻螺钉 AB型 [Table VI2]
Type I Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI2]
71 IA型米字槽100°沉头自攻螺钉 B,BP型 [Table VI3] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽100°沉头自攻螺钉 B,BP型 [Table VI3]
Type IA Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI3]
72 IA型米字槽100°沉头自攻螺钉 AB型 [Table VI3] [美标]
ASME B 18.6.4 - 1998 (R2005)
IA型米字槽100°沉头自攻螺钉 AB型 [Table VI3]
Type IA Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI3]
73 II型十字槽100°沉头自攻螺钉 B,BP型 [Table VI4] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽100°沉头自攻螺钉 B,BP型 [Table VI4]
Type II Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI4]
74 II型十字槽100°沉头自攻螺钉 AB型 [Table VI4] [美标]
ASME B 18.6.4 - 1998 (R2005)
II型十字槽100°沉头自攻螺钉 AB型 [Table VI4]
Type II Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI4]
75 十字槽沉头自攻螺钉 [深圳紧固件行业协会标准]
T/SZJGJ 001 (C) - 2024
十字槽沉头自攻螺钉
Cross Recessed Countersunk Head Tapping Screws
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