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Global Manufacturer Identification Symbols
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Country or Region Company Symbol Note
China Taiwan Hwang Shiang Ind. Co., Ltd. H
China Mainland Ningbo Taidahezhong Fastener Manufacture Co., Ltd. TDF
China Mainland Haining Zhongda Fasteners Co., Ltd. 01RD
China Mainland Chilok Industry Co., Ltd. O or 大
China Taiwan Yeu Yuan Ltd. 01VU
China Taiwan Wattson Fastener Group Inc. WF
China Mainland Suzhou GPYH International Technology Co., Ltd. GP
China Mainland Jinshang Technology Co., Ltd.
China Mainland Mingzhan Aviation Technology (Hangzhou) Co., Ltd. MAT
America Penn Automotive, Inc.
America Patriot Bolt LLC 01XQ
China Mainland Zhejiang Meiquan Fastener Intelligent Manufacturing Co., Ltd. M9
China Mainland Liaoning Shiqiang Machinery Manufacturing Co., Ltd. SQ
China Taiwan Tycoons Group Enterprise Co., Ltd. TY
China Mainland Jinyou Technology (Jiaxing) Co., Ltd. WWW
China Taiwan Chang Chi Metal Industry Co., Ltd. C
China Mainland Hebei Upsetting Fastener Manufacturing Co., Ltd. DGF
Japan Alps Seiko Co., Ltd.
China Mainland Sichuan Jianyang Sanhe Standard Parts Co., Ltd. JB
China Mainland Hangzhou Dingmingshang Industrial Co., Ltd. DMS
America Duncan Bolt Co. 01SN
China Mainland Dalian Hengping Precision Fasteners Co., Ltd. SEA
China Mainland Hangzhou Tongyu Machinery Co., Ltd. T+
China Mainland Hangzhou Damao Technology Co., Ltd. DM
America Birmingham Fastener & Supply Inc. BF
India R.F. India 01WV or 01WS
China Mainland Zhejiang Jinbi Fastener Manufacturing Co., Ltd. DX
America Lewis Bolt & Nut Company
China Mainland Shanghai Lock&Lock Trade Co., Ltd. LK
China Mainland Jiaxing Youwei General Parts Co., Ltd. W
China Mainland Hangzhou Lihuahuang Industrial Co., Ltd. SM
America Allied Bolt Products LLC ALLIED BOL
America American Specialty Products and Machine, Inc. 611
China Mainland Anhui Chaohu Foundry Factory Co., Ltd. A
China Mainland Wuhan Langwei Hengyue Technology Co., Ltd. LWHY
America Bolts of America LLC 01XM
China Mainland Nanjing Fubeier Metal Products Co., Ltd. FBR
America United Titanium, Inc. UT
China Mainland Jiangxi Chengde Fasteners Co., Ltd. CF
China Mainland Shanghai Jin-He Fastener Co., Ltd. JHF
China Mainland Ningbo Ninghe Power Locomotive Parts Co., Ltd. NH
China Mainland Shenyang Tools Standard Parts Manufacturing Co., Ltd. BG
China Mainland Zhejiang GANCHO Standard Parts Enterprise GC
America Wecall Inc. 01OH
China Mainland Sahndong Baoyuan Standard Parts Manufacture Co., Ltd. YBY
America RX Industrial Corp. 01LO
America Sales Systems Limited
China Mainland Jiashan Steelfit Trading Co., Ltd. 01WD
China Mainland Shanghai Jingyang Imp. & Exp Co., Ltd. JYF
America Hammond Machine Works, Inc. H
China Mainland Guangzhou Shangyi Machinery Co., Ltd. GSY or YSY
China Mainland Shanghai Fastenman Metal Product Co., Ltd. HFM
America C.F.F.F. Corp DBA Formed Fastener FF
America Kenneth G. Lilly Fasteners, Inc. KGL
China Mainland Shanghai Zhengao Automobile Technology Co., Ltd. ZG
China Mainland Wenzhou Meiquan Auto Parts Co., Ltd. MQ
China Mainland Shenyang LeDongQi Commercial and Trade Co., Ltd. DK
China Mainland Hebei Puyang Iron and Steel Co., Ltd. PY
China Mainland Zhangjiagang Tonghao Metal Products Co., Ltd. TH
China Mainland Ningbo Taidahezhong Fastener Manufacture Co., Ltd. HZF
China Mainland Shandong Zenno Chemical Equipment Co., Ltd. ZN
America STS Industrial, Inc. STS or 01WZ
China Mainland Handan Lianhua Fastener Co., Ltd. GST
China Mainland DB Fasteners (China) Ltd. DBF
America Threading & Sealing Technologies, LLC. 01WN
China Mainland Boai Mingchuang Nonferrous Standard Parts Co., Ltd. MC
China Mainland Nantong Ansaile Fastener Co., Ltd. ASL
China Taiwan Asia Technical Services Pte. Ltd. Asiatec
China Mainland Xuzhou Hui Li Gao Qiang Standard Component Co., Ltd.
China Mainland Wuhan Guanxiong Hardware Co., Ltd. GX
China Mainland Jinan Star Fastener Co., Ltd. PB or STAR
China Mainland Ningbo Lingqi Hardware Industrial Co., Ltd. LQ
China Mainland Shenzhen Winjoin Industrial Technology Co., Ltd. WZ
China Mainland Zhejiang Rising Fastener Co., Ltd. 01VK
China Mainland Huai'an Suli Fastener Co., Ltd. HASL or 建机 苏建
China Mainland Haiyan Hongrun Fastener Co., Ltd. HRF
China Mainland Zhejiang Dite High Intension Bolt Co., Ltd. DL
America Universal Punch Corp. USA
China Mainland Shanghai Caifu Machinery Co., Ltd. TK
China Mainland Shenzhen Aerofasteners Mfg. Co., Ltd. 3L
China Mainland Zhejiang Sanlin Metals Products Co., Ltd. SAN
America Wyandotte Industries, Inc.
China Mainland Suzhou Topfast Mechatronics Co., Ltd. STX
Japan Muro Corporation VISROPE
China Mainland Jiangsu Ningxin Automotive Parts Co., Ltd. JNX
America Ameribolt, Inc.
China Mainland Infastech Fastening System (Nantong) Co., Ltd. JSR
China Mainland Ningbo Zhongbin Fastener Manufacturing Co., Ltd.
China Taiwan Patta International Limited PATTA®
China Mainland Wuxi No.2 Standard Pieces Manufacturing Co., Ltd. EB
Pakistan M.B.I. Industries (PVT) Limited 01YB
Malaysia Sanwa Iron (Malaysia) Sdn. Bhd. 01WC
China Mainland Suzhou Sanyong Metals Products Co., Ltd. SU
China Mainland Guangdong Jiesiwei Screw City Co., Ltd. J∙T
China Mainland Hebei Hanguang Heavy Industry Ltd. HGF
China Mainland Shaoxing Shunxin Fastener Co., Ltd. SXS
America Thalasinos & Thalasino Enterprises, Inc. TT010J
China Taiwan Qst International Corp.
China Mainland Shanghai Xinluo Enterprise Development Co., Ltd. SX
China Taiwan Panther T&H Industry Co., Ltd. PTH
China Mainland Yancheng Yonggao Metal Technology Co., Ltd. YY

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Note:
①China National Technical Committee for Fasteners: Identifying Marks of Verified Fastener Manufacturers, Announcement No. 10 [2021-04-08];
②U.S. Patent & Trademark Office Fastener Insignia Register Active Insignias, Jan 29, 2020;
③China National Technical Committee for Fasteners: Identifying Marks of Verified Fastener Manufacturers, Announcement No. 11 [2023-05-16];
④China National Technical Committee for Fasteners: Identifying Marks of Verified Fastener Manufacturers, Announcement No. 12-1 [2024-01-15];
⑤China National Technical Committee for Fasteners: Identifying Marks of Verified Fastener Manufacturers, Announcement No. 13-1 [2024-11-01];
⑥China National Technical Committee for Fasteners: Identifying Marks of Verified Fastener Manufacturers, Announcement No. 14 [2025-04-15];