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Socket head cap screws

Socket head cap screws, Total:226 items.

In the international standard classification, Socket head cap screws involves: Fasteners, Fasteners for aerospace construction, Hand-held tools, Non-ferrous metals, Machine tool systems, Medical equipment, Miscellaneous domestic and commercial equipment, Chipless working equipment.

Association Francaise de Normalisation, Socket head cap screws

NF E25-125*NF EN ISO 4762:2004 Hexagon socket head cap screws.
NF L22-298:1979 Hexagon socket head cap screws, fully threaded. ISO thread.
NF E74-331:1995 Assembly tools for screws and nuts. Hexagon socketscrew keys.
NF E25-177*NF EN ISO 12474:2010 Hexagon socket head cap screws with metric fine pitch thread
NF S94-151*NF ISO 8319-1:1996 Orthopaedic instruments. Drive connections. Part 1 : keys for use with screws with hexagon socket heads.
NF ISO 2351-3:2014 Outils de manoeuvre pour vis et écrous - Embouts tournevis à machine - Partie 3 : embouts tournevis pour vis à six pans creux
NF E74-353-3*NF ISO 2351-3:2014 Assembly tools for screws and nuts - Machine-operated screwdriver bits - Part 3 : screwdriver bits for hexagon socket screws
NF ISO 8319-1:1996 Instruments orthopédiques - Raccords d'entraînement - Partie 1 : clés à utiliser pour les vis à tête à six pans creux.
NF E25-111*NF EN ISO 14580:2011 Hexalobular socket cheese head screws.
NF E25-106:1997 Hexagon socket countersunk head screws.
NF E25-125:1997 Hexagon socket head cap screws.
NF E25-126:1997 HEXAGON SOCKET BUTTON HEAD SCREWS. (EUROPEAN STANDARD EN ISO 7380).
NF EN ISO 4762:2004 Vis à tête cylindrique à six pans creux
NF EN ISO 4026:2004 Vis sans tête à six pans creux, à bout plat
NF EN ISO 4029:2004 Vis sans tête à six pans creux, à bout cuvette
NF EN ISO 4027:2004 Vis sans tête à six pans creux, à bout tronconique

International Organization for Standardization (ISO), Socket head cap screws

ISO 4762:2004 Hexagon socket head cap screws
ISO 4762:1977/Amd 1:1984 Hexagon socket head cap screws — Product grade A — Amendment 1
ISO 4762:1989 Hexagon socket head cap screws - Product grade A
ISO 12474:2010 Hexagon socket head cap screws with metric fine pitch thread
ISO 14579:2011 Hexalobular socket head cap screws
ISO 14579:2001 Hexalobular socket head cap screws
ISO 2936:1995 Assembly tools for screws and nuts - Hexagon socket screw keys
ISO 3109:1974 Assembly tools for screws and nuts — Hexagon insert bits for hexagon socket head screws
ISO 2936:1983 Assembly tools for screws and nuts; Hexagon socket screw keys; Metric series
ISO 8319-1:1996 Orthopaedic instruments - Drive connections - Part 1: Keys for use with screws with hexagon socket heads
ISO 14580:2011 Hexalobular socket cheese head screws
ISO 14580:2001 Hexalobular socket cheese head screws
ISO 21269:2004 Hexagon socket head cap screws with metric fine pitch thread

German Institute for Standardization, Socket head cap screws

DIN 34827:2005 Hexalobular socket set screws
DIN 34827:2016 Hexalobular socket set screws
DIN EN ISO 4762:2004-06 Hexagon socket head cap screws (ISO 4762:2004); German version EN ISO 4762:2004
DIN EN ISO 12474:2011-01 Hexagon socket head cap screws with metric fine pitch thread (ISO 12474:2010); German version EN ISO 12474:2010
DIN 6912:2021-03 Hexagon socket head cap screws with reduced loadability - Low head, with centre
DIN 7984:2021 Hexagon socket head cap screws with low head with reduced loadability
DIN 7984:2022 Hexagon socket head cap screws with low head with reduced loadability
DIN ISO 2936:2001 Assembly tools for screws and nuts - Hexagon socket screw keys (ISO 2936:2001)
DIN 6912:2021 Hexagon socket head cap screws with reduced loadability - Low head, with centre
DIN 7422:2002-10 Bits with square drive for hexagon socket screws, hand operated
DIN ISO 2936:2016 Assembly tools for screws and nuts - Hexagon socket screw keys (ISO 2936:2014)
DIN ISO 2351-3:2015-08 Assembly tools for screws and nuts - Machine-operated screwdriver bits - Part 3: Screwdriver bits for hexagon socket screws (ISO 2351-3:2014)
DIN 34805-2:2017 Button head screws - Part 2: Screws with collar and driving feature hexalobular socket
DIN 34805-2:2018 Button head screws - Part 2: Screws with collar and driving feature hexalobular socket
DIN 34805-2:2018-12 Button head screws - Part 2: Screws with collar and driving feature hexalobular socket
DIN 7426:1995 Hexagon insert bits for hexagon socket screws
DIN 34802:2001 Hexalobular socket heat cap screw with large driving feature
DIN EN ISO 10642:2004 Hexagon socket countersunk head screws (ISO 10642:2004); German version EN ISO 10642:2004
DIN EN ISO 14579:2011-06 Hexalobular socket head cap screws (ISO 14579:2011); German version EN ISO 14579:2011
DIN EN ISO 10642:1998 Hexagon socket countersunk head screws (ISO 10642:1997); German version EN ISO 10642:1997
DIN 8376:2006-11 Subland twist drills with parallel shank for clearance holes and counterbores for hexagon socket head cap screws and slotted cheese head screws
DIN 8377:2006-11 Subland twist drills with Morse taper shank for clearance holes and counterbores for hexagon socket head cap screws and slotted cheese head screws

Danish Standards Foundation, Socket head cap screws

DS/EN ISO 4762:2004 Hexagon socket head cap screws
DS/ISO 4762:1983 Hexagon socket head cap screws. Product grade A
DS/EN ISO 12474:2010 Hexagon socket head cap screws with metric fine pitch thread
DS/EN ISO 10642:2004 Hexagon socket countersunk head screws
DS/EN ISO 14583:2011 Hexalobular socket pan head screws
DS/EN ISO 4028:2004 Hexagon socket set screws with dog point
DS/EN ISO 10642/A1:2013 Hexagon socket countersunk head screws
DS/EN ISO 7380-1:2011 Button head screws - Part 1: Hexagon socket button head screws

Japanese Industrial Standards Committee (JISC), Socket head cap screws

JIS B 1136:2004 Hexalobular socket head cap screws
JIS B 1136:2014 Hexalobular socket head cap screws
JIS B 1136 AMD 1:2015 Hexalobular socket head cap screws (Amendment 1)
JIS B 1174:2000 Hexagon socket button head screws
JIS B 1176:2000 Hexagon socket head cap screws
JIS B 1174:2006 Hexagon socket button head screws
JIS B 1176:2006 Hexagon socket head cap screws
JIS B 1177:2007 Hexagon socket set screws
JIS B 1107:2014 Hexalobular socket head screws
JIS B 1176:2014 Hexagon socket head cap screws
JIS B 1194:2000 Hexagon socket countersunk head screws
JIS B 1194:2006 Hexagon socket countersunk head screws
JIS B 1174:2017 Hexagon socket button head screws
JIS B 1194 ERRATUM 1:2000 Hexagon socket countersunk head screws (Erratum 1)

CEN - European Committee for Standardization, Socket head cap screws

EN ISO 14583:2001 Hexalobular Socket Pan Head Screws
EN ISO 14580:2001 Hexalobular Socket Cheese Head Screws
EN ISO 14579:2001 Hexalobular Socket Head Cap Screws
EN ISO 14585:2001 Hexalobular Socket Pan Head Tapping Screws (Incorporating Corrigendum December 2005)

European Committee for Standardization (CEN), Socket head cap screws

EN ISO 14583:2011 Hexalobular socket pan head screws (ISO 14583:2011)
EN ISO 14580:2011 Hexalobular socket cheese head screws
EN ISO 14579:2011 Hexalobular socket head cap screws (ISO 14579:2011)
EN ISO 10642:1997 Hexagon Socket Countersunk Head Screws ISO 10642:1997
EN ISO 10642:2019 Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO 10642:2019)
EN ISO 14585:2011 Hexalobular socket pan head tapping screws (ISO 14585:2011)
EN ISO 10642:2004 Hexagon socket countersunk head screws ISO 10642:2004
EN ISO 7380-1:2023 Fasteners - Button head screws with reduced loadability - Part 1: Hexagon socket button head screws (ISO 7380-1:2022)
EN ISO 7380-1:2011 Button head screws - Part 1: Hexagon socket button head screws
EN ISO 21269:2004 Hexagon socket head cap screws with metric fine pitch thread ISO 21269:2004

Professional Standard - Aviation, Socket head cap screws

HB 1604-1987 Knurled socket head cap screws
HB 5817-1982 Aircraft Conduit Clip Hexagon Socket Screws
HB 4535.29-1991 K type hole series combined clamp elements Interior hexagonal screw
HB 4284.20-1989 Plastic Injection Mold Standard Parts Cylindrical Head Hexagon Socket Cap Screws
HB 7148.7-1995 Large series combination clamp fasteners knurled socket head cap screws
HB 4439-1990 Hexagon socket discharge screw

British Standards Institution (BSI), Socket head cap screws

BS EN ISO 14579:2001 Hexalobular socket head cap screws
BS A 287, A 288 [...]:1982 Specification for hexagon socket head cap screws - Metric series
BS EN ISO 12474:2011 Hexagon socket head cap screws with metric fine pitch thread
BS EN ISO 12474:2010 Hexagon socket head cap screws with metric fine pitch thread
BS EN ISO 14579:2011 Hexalobular socket head cap screws
BS 4168-6:1982 Hexagon socket screws and wrench keys: metric series. Specification for hexagon socket button head screws
BS 4168-8:1982 Hexagon socket screws and wrench keys: metric series. Specification for hexagon socket countersunk head screws
BS 4168-1:1981 Hexagon socket screws and wrench keys: metric series. Specification for hexagon socket head cap screws
BS EN ISO 7380-1:2011 Button head screws. Hexagon socket button head screws
BS 4168-7:1982 Hexagon socket screws and wrench keys: metric series - Specification for hexagon socket shoulder screws
BS ISO 2351-3:2014 Assembly tools for screws and nuts. Machine-operated screwdriver bits. Screwdriver bits for hexagon socket screws
BS EN ISO 10642:2004+A1:2012 Hexagon socket countersunk head screws
BS EN ISO 14580:2011 Hexalobular socket cheese head screws
BS EN ISO 7380-2:2011 Button head screws. Hexagon socket button head screws with collar
BS EN ISO 14585:2011 Hexalobular socket pan head tapping screws
BS EN ISO 14586:2011 Hexalobular socket countersunk head tapping screws

RU-GOST R, Socket head cap screws

GOST R 57981-2017 Hexagon socket screw keys. Specifications
GOST R ISO 4762-2012 Hexagon socket head screws
GOST ISO 8319-1-2011 Orthopaedic instruments. Drive connections. Part 1. Keys for use with screws with hexagon socket heads
GOST R ISO 10642-2012 Hexagon socket countersunk head screws
GOST R ISO 12474-2012 Hexagon socket head cap screws with metric fine pitch thread
GOST ISO 7380-1-2014 Button head screws. Part 1. Hexagon socket button head screws

Korean Agency for Technology and Standards (KATS), Socket head cap screws

KS B ISO 14579:2004 Hexalobular socket head cap screws
KS W 1621-2004(2019) Aerospace－Socket head cap screw
KS P ISO 8319-1-2010(2016) Orthopaedic instruments－Drive connections－Part 1：Keys for use with screws with hexagon socket heads
KS P ISO 8319-1:2010 Orthopaedic instruments－Drive connections－Part 1：Keys for use with screws with hexagon socket heads
KS B ISO 14580:2007 Hexalobular socket cheese head screws
KS B 1028-1990 Hexagon socket set screws
KS B 2815-2000 HEXAGON SOCKET BUTTON HEAD SCREWS
KS B 1061-2007 HEXAGON SOCKET BUTTON HEAD SCREWS
KS B 1061-1990(2005) HEXAGON SOCKET BUTTON HEAD SCREWS
KS B 1067-2009(2020) Hexagon socket button head screws
KS B 2815-1998 HEXAGON SOCKET BUTTON HEAD SCREWS
KS B 1028-1990(2020) Hexagon socket set screws
KS B ISO 14580:2013 Hexalobular socket cheese head screws
KS B 1061-1990 HEXAGON SOCKET BUTTON HEAD SCREWS

Professional Standard - Light Industry, Socket head cap screws

QB/T 4209-2011 Screwdriver bits for hexagon socket screws
QB/T 2564.7-2015 Screwdrivers.Screwdriver for hexagon socket screws

Lithuanian Standards Office , Socket head cap screws

LST EN ISO 4762:2004 Hexagon socket head cap screws (ISO 4762:2004)
LST EN ISO 12474:2011 Hexagon socket head cap screws with metric fine pitch thread (ISO 12474:2010)
LST EN ISO 4028:2004 Hexagon socket set screws with dog point (ISO 4028:2003)
LST EN ISO 10642:2004 Hexagon socket countersunk head screws (ISO 10642:2004)
LST EN ISO 14583:2011 Hexalobular socket pan head screws (ISO 14583:2011)

AENOR, Socket head cap screws

UNE-EN ISO 4762:2005 Hexagon socket head cap screws (ISO 4762:2004)
UNE-EN ISO 12474:2011 Hexagon socket head cap screws with metric fine pitch thread (ISO 12474:2010)
UNE 16506-3:2000 Assembly tools for screws and nuts. Screwdriver bits. Parte 3: Screwdriver bits for hexagon socket screws, with shank. Technical specifications and tests.
UNE-EN ISO 10642:2005 Hexagon socket countersunk head screws (ISO 10642:2004)
UNE-EN ISO 14583:2011 Hexalobular socket pan head screws (ISO 14583:2011)
UNE-EN ISO 4028:2005 Hexagon socket set screws with dog point (ISO 4028:2003)

IFI/FASTNR - Industrial Fastener Institute, Socket head cap screws

SECT G- Section G - Socket Screws
535-1982 Metric Socket Countersunk Head Cap Screws

Professional Standard - Aerospace, Socket head cap screws

QJ 289-1978 Hex socket head cap screws
QJ 959.3-1985 Multi-functional combined stamping formwork element hexagon socket head screw
QJ 1960.26-1990 Light series multi-functional combined stamping formwork components hexagon socket head screws
QJ 1960.26A-2007 Multifunctional combined stamping formwork elements - Part 26: Hexagon socket head cap screws
QJ 74.2A-1997 Machine Tool Fixture Parts and Components Lathe Faceplate Safety Device Hexagon Screws
QJ/Z 131.18-1984 Machine Tool Fixture Parts Process Card Atlas Hexagonal Screw Process Card

Standard Association of Australia （SAA）, Socket head cap screws

AS 1420:2008(R2015)

American Society of Mechanical Engineers (ASME), Socket head cap screws

ASME B18.3.1M-1986(R2008) Socket Head Cap Screws (Metric Series)

American National Standards Institute （ANSI), Socket head cap screws

ANSI/ASME B18.3.1M-1986 Screws, Socket Head Cap (Metric Series)

未注明发布机构, Socket head cap screws

BS EN ISO 21269:2004 Hexagon socket head cap screws with metric fine pitch thread
BS 4168-8:1982(1999) Hexagon socket screws and wrench keys : metric series — Part 8 : Specification for hexagon socket countersunk head screws

ZA-SANS, Socket head cap screws

SANS 1700-19-2:2003 Fasteners Part 19: Hexalobular socket head screws Section 2: Hexalobular socket cheese head screws
SANS 1700-19-3:2003 Fasteners Part 19: Hexalobular socket head screws Section 3: Hexalobular socket pan head screws
SANS 1700-19-4:2003 Fasteners Part 19: Hexalobular socket head screws Section 4: Hexalobular socket raised countersunk head screws
SANS 1700-19-1:2003 Fasteners Part 19: Hexalobular socket head screws Section 1: Hexalobular socket head cap screws
SANS 1700-9-4:1998 Fasteners Part 9: Hexagon socket head screws Section 4: Hexagon socket countersunk head screws
SANS 1700-9-1:1998 Fasteners Part 9: Hexagon socket head screws Section 1: Hexagon socket head cap screws
SANS 1700-9-2:1996 Fasteners Part 9: Hexagon socket head screws Section 2: Hexagon socket head shoulder screws
SANS 1700-9-3:1998 Fasteners Part 9: Hexagon socket head screws Section 3: Hexagon socket button head screws
SANS 1700-19-5:2003 Fasteners Part 19: Hexalobular socket head screws Section 5: Hexalobular socket pan head tapping screws
SANS 1700-19-6:2003 Fasteners Part 19: Hexalobular socket head screws Section 6: Hexalobular socket countersunk head tapping screws
SANS 1700-9-4:2008 Fasteners Part 9: Hexagon socket head screws Section 4: Hexagon socket countersunk head screws
SANS 1700-19-7:2003 Fasteners Part 19: Hexalobular socket head screws Section 7: Hexalobular socket raised countersunk (oval) head tapping screws
SANS 1700-9-1:2008 Fasteners Part 9: Hexagon socket head screws Section 1: Hexagon socket head cap screws
SANS 1700-9-3:2008 Fasteners Part 9: Hexagon socket head screws Section 3: Hexagon socket button head screws

American Society for Testing and Materials (ASTM), Socket head cap screws

ASTM A574-04 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM A574-04e1 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM A574-00 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM A574-21 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM F468-22 Standard Specification for Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs for General Use
ASTM F837-02a Standard Specification for Stainless Steel Socket Head Cap Screws
ASTM F837-02ae1 Standard Specification for Stainless Steel Socket Head Cap Screws
ASTM F837-02 Standard Specification for Stainless Steel Socket Head Cap Screws
ASTM A574-11 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM F837-13 Standard Specification for Stainless Steel Socket Head Cap Screws
ASTM A574-13 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM A574-08 Standard Specification for Alloy Steel Socket-Head Cap Screws
ASTM A574M-04e1 Standard Specification for Alloy Steel Socket-Head Cap Screws [Metric]
ASTM A574M-04 Standard Specification for Alloy Steel Socket-Head Cap Screws [Metric]
ASTM A574M-00 Standard Specification for Alloy Steel Socket-Head Cap Screws [Metric]
ASTM A574M-12 Standard Specification for Alloy Steel Socket-Head Cap Screws (Metric)
ASTM F468-23 Standard Specification for Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs for General Use
ASTM F837M-02a Standard Specification for Stainless Steel Socket Head Cap Screws [Metric]
ASTM F837M-02 Standard Specification for Stainless Steel Socket Head Cap Screws [Metric]
ASTM A574M-08 Standard Specification for Alloy Steel Socket-Head Cap Screws [Metric]
ASTM A574M-11 Standard Specification for Alloy Steel Socket-Head Cap Screws [Metric]
ASTM F837M-02a(2015) Standard Specification for Stainless Steel Socket Head Cap Screws [Metric]
ASTM F837M-16 Standard Specification for Stainless Steel Socket Head Cap Screws [Metric]
ASTM F879-02a(2008) Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
ASTM F879-15(2020) Standard Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
ASTM F879-23 Standard Specification for Stainless Steel Socket Button, Low and Flat Countersunk Head Cap Screws
ASTM F468-12 Standard Specification for Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs for General Use

Defense Logistics Agency, Socket head cap screws

DLA MS18116 REV H VALID NOTICE 2-2007 Bolt, Stud, and Socket Cap Head Screw, Nickel-Copper-Aluminum Alloy
DLA MS18116 REV H (1)-2002 BOLT, STUD, AND SOCKET CAP HEAD SCREW, NICKEL- COPPER-ALUMINUM ALLOY
DLA MS18116 REV H VALID NOTICE 1-1994 BOLT, STUD, AND SOCKET CAP HEAD SCREW, NICKEL- COPPER-ALUMINUM ALLOY
DLA MS18116 REV H REINST NOTICE-1988 BOLT, STUD, AND SOCKET CAP HEAD SCREW, NICKEL- COPPER-ALUMINUM ALLOY
DLA MS35456 REV B VALID NOTICE 2-2013 Screw, Cap, Socket Head - Hexagon, Alloy Steel, Uncoated, UNF-3A

International Federation of Trucks and Engines, Socket head cap screws

NAVISTAR ESP CM-28.101-GS-2015 VOID - Hex Socket Head Capscrews - General Specifications - Metric Series
NAVISTAR ESP C-28.101-GS-2015 VOID - Hexagon Socket Head Cap Screws - General Specifications (Noun Code 7450)
NAVISTAR ESP C-28.121-PP-2015 VOID - Hexagon Socket Head Capscrews - Preferred Parts (Noun Code 7450)
NAVISTAR ESP CM-28.121-PP-2015 VOID - Hex Socket Head Capscrews - Preferred Parts (Noun Code - 7450)
NAVISTAR ESP C-28.221-NPP-2015 VOID - Hexagon Socket Head Cap Screws - Non Preferred Parts (Noun Code - 7450)

机械工业部, Socket head cap screws

JB/T 6188.7-1992 16mm groove system combination clamp fastener hexagon socket screw

GM North America, Socket head cap screws

GM GMC132-1996 Metric Pan Head 6-Lobed Socket Machine Screws General Specifications
GM GMC144-1996 Metric Oval 90 Degree Countersunk Trim Head 6-Lobed Socket Machine Screws General Specifications

Professional Standard - Machinery, Socket head cap screws

JB/T 8043.2-1999 The parts and units of jigs and fixtures.Inner hex screw for plastic fixture
JB/T 4212.5-1996 Mold for cold heading interior hexagonal cylindrical head screws Interior hexagonal punch pin A type
JB/T 4212.6-1996 Mold for cold heading interior hexagonal cylindrical head screws Interior hexagonal punch pin B type
JB/T 4212.7-1996 Mold for cold heading interior hexagonal cylindrical head screws Interior hexagonal punch pin C type
JB/T 4212.8-1996 Mold for cold heading interior hexagonal cylindrical head screws Interior hexagonal punch pin D type

Professional Standard - Medicine, Socket head cap screws

YY/T 0957.1-2014 Orthopaedic instruments.Drive connections.Part 1:Keys for use with screws with hexagon socket heads

VN-TCVN, Socket head cap screws

TCVN 54-1986 Hexagon socket headcap screws.Design and dimensions

AIA/NAS - Aerospace Industries Association of America Inc., Socket head cap screws

NASM21262-1998 Screws@ Self Locking@ 250 Degrees F@ Cylindrical Head Hexagonal Wrenching Socket@ Alloy Steel@ 160 KSI Ftu (Socket Head Cap Screws)
NASM21295-1999 Screws@ Self Locking@ 250 Degrees F@ Cylindrical Head@ Hexagonal Wrenching Socket@ Corrosion Resisting Steel 80 KSI Ftu (Socket Head Cap Screws)

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Socket head cap screws

GB/T 70.3-2000 Hexagon socket countersunk head screws
GB/T 70.3-2008 Hexagon socket countersunk head screws
GB/T 5358-1998 Hexagon spline screwdrivers

Aerospace Industries Association, Socket head cap screws

AIA NASM21262-1998 Screws, Self Locking, 250 Degrees F, Cylindrical Head Hexagonal Wrenching Socket, Alloy Steel, 160 KSI Ftu (Socket Head Cap Screws) FSC 5305
AIA NASM21295-1999 Screws, Self Locking, 250 Degrees F, Cylindrical Head, Hexagonal Wrenching Socket, Corrosion Resisting Steel 80 KSI Ftu (Socket Head Cap Screws) FSC 5306

IN-BIS, Socket head cap screws

IS 6761-1972

国家市场监督管理总局、中国国家标准化管理委员会, Socket head cap screws

GB/T 5358-2021 Screwdriver for hexalobular socket screws

工业和信息化部, Socket head cap screws

QB/T 5378-2019 Hexalobular screwdriver bit