Core Features of Combined Bolt/Socket Head Cap Bolt with Captive Washer

Socket head cap design: Provides high torque transmission, suitable for installation in narrow or recessed spaces, with a sleek surface for aesthetic appeal
Captive washer feature: Eliminates washer loss during transportation or installation, simplifies assembly processes, and ensures consistent washer positioning
Washer functions: Distributes clamping force evenly, protects workpiece surfaces from damage, and enhances anti-loosening performance and connection stability
Corrosion resistance: Stainless steel or surface-treated (e.g., zinc plating, blackening) variants adapt to indoor/outdoor and harsh environments

Product Parameter (Specification)

Standard	DIN,ASTM/ANSI, JIS, EN, ISO,AS	Material	Carbon steel, Stainless Steel, Aluminum,Brass
Surface Treatment	Zinc Plated, Hop Dip Galvanized(HDG) phosphorization, Black Oxide,Geomet,Dacroment,Nickel plated,Zinc-Nickel plated	Shank	Full thread, Half thread
Grade	4.8,5.8,6.8,8.8, 10.9, 12.9,B7,B7M,B8,B8M,304,316,A2,A4	Size	M3-M64
Unite	Piece,KGS,TON	Packing	Bulk cartons with pallet, small boxes in cartons with pallet

Product Application

Combined screw hexagon socket head cap screw is widely used in heavy Industry, mining, water treatment, healthcare, retail industry, general industry, Oil & Gas, automotive industry, solar system mounting etc.

Socket Head Cap Bolt with Captive Washer Application Scenario Table

Application Field	Specific Application Scenario	Recommended Standards & Grades	Key Considerations
1. Household Use	1. Assembly of solid wood furniture 2. Installation of bathroom/kitchen hardware 3. Fixing of home appliance accessories 4. DIY small projects 5. Mounting of outdoor household items	– Standards: ISO 4762 + custom captive washer; DIN 912 – Grades: Carbon steel Grade 4.6/5.6; Stainless steel A2-70	– Captive washer core value: Prevents small washer loss during DIY installation, easy for non-professionals to operate.
2. Construction Engineering	1. Fixing of lightweight ceiling components 2. Installation of aluminum alloy door/window parts 3. Fastening of interior decoration elements 4. Connection of partition wall accessories 5. Fixing of accessories	– Standards: ISO 4762 + captive washer; ASTM F835 (construction stainless steel); DIN 912 Grade 8.8 (medium-load)	– Efficiency advantage: Integrated bolt-washer design reduces part count, speeding up on-site construction (meets project schedules).
3. Home Smart Devices	1. Mounting of smart door lock mounting plates to wooden/metal doors. 2. Fixing of robot vacuum charging docks to floor tiles. 3. Installation of smart camera brackets to outdoor walls/indoor corners. 4. Fastening of smart socket holders to desk surfaces or wall panels. 5. Connection of smart curtain motor mounting frames to window lintels.	– Standards: ISO 4762 + captive washer; ASTM F835 – Grades: Stainless steel A2-70 (indoor, anti-humidity); Carbon steel Grade 5.6	– Space-saving: Low-profile socket head fits narrow spaces (e.g., between door frames and smart locks).
4. Light Industrial Equipment	1. Fixing of small machine safety guards. 2. Installation of production line auxiliary parts . 3. Fastening of equipment control panel covers. 4. Connection of lightweight mechanical components. 5. Fixing of workshop tool holders.	– Standards: ISO 4762 + captive washer; DIN 912 Grade 8.8 ; ASTM F835	– Assembly efficiency: Integrated design reduces assembly steps, suitable for batch production lines.

Combined Bolt/Socket Head Cap Bolt with Captive Washer

High-strength bolt with captive washer for secure fastening applications.

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Combined Bolt/Socket Head Cap Bolt with Captive Washer

A specialized combined fastener integrating a socket head cap boltwith a captive washer (washer fixed to the bolt shank, non-detachable)
Complies with international standards such as ISO 4762 (bolt) and DIN 125 (washer), ensuring dimensional accuracy and interchangeability
Common materials include carbon steel (e.g., 45#), stainless steel (e.g., 304, 316), and alloy steel
With high-strength variants undergoing heat treatment

Category: Hexagon Socket Screws

Description

Standard	DIN,ASTM/ANSI, JIS, EN, ISO,AS	Material	Carbon steel, Stainless Steel, Aluminum,Brass
Surface Treatment	Zinc Plated, Hop Dip Galvanized(HDG) phosphorization, Black Oxide,Geomet,Dacroment,Nickel plated,Zinc-Nickel plated	Shank	Full thread, Half thread
Grade	4.8,5.8,6.8,8.8, 10.9, 12.9,B7,B7M,B8,B8M,304,316,A2,A4	Size	M3-M64
Unite	Piece,KGS,TON	Packing	Bulk cartons with pallet, small boxes in cartons with pallet

Application Field	Specific Application Scenario	Recommended Standards & Grades	Key Considerations
1. Household Use	1. Assembly of solid wood furniture 2. Installation of bathroom/kitchen hardware 3. Fixing of home appliance accessories 4. DIY small projects 5. Mounting of outdoor household items	– Standards: ISO 4762 + custom captive washer; DIN 912 – Grades: Carbon steel Grade 4.6/5.6; Stainless steel A2-70	– Captive washer core value: Prevents small washer loss during DIY installation, easy for non-professionals to operate.
2. Construction Engineering	1. Fixing of lightweight ceiling components 2. Installation of aluminum alloy door/window parts 3. Fastening of interior decoration elements 4. Connection of partition wall accessories 5. Fixing of accessories	– Standards: ISO 4762 + captive washer; ASTM F835 (construction stainless steel); DIN 912 Grade 8.8 (medium-load)	– Efficiency advantage: Integrated bolt-washer design reduces part count, speeding up on-site construction (meets project schedules).
3. Home Smart Devices	1. Mounting of smart door lock mounting plates to wooden/metal doors. 2. Fixing of robot vacuum charging docks to floor tiles. 3. Installation of smart camera brackets to outdoor walls/indoor corners. 4. Fastening of smart socket holders to desk surfaces or wall panels. 5. Connection of smart curtain motor mounting frames to window lintels.	– Standards: ISO 4762 + captive washer; ASTM F835 – Grades: Stainless steel A2-70 (indoor, anti-humidity); Carbon steel Grade 5.6	– Space-saving: Low-profile socket head fits narrow spaces (e.g., between door frames and smart locks).
4. Light Industrial Equipment	1. Fixing of small machine safety guards. 2. Installation of production line auxiliary parts . 3. Fastening of equipment control panel covers. 4. Connection of lightweight mechanical components. 5. Fixing of workshop tool holders.	– Standards: ISO 4762 + captive washer; DIN 912 Grade 8.8 ; ASTM F835	– Assembly efficiency: Integrated design reduces assembly steps, suitable for batch production lines.

Combined Bolt/Socket Head Cap Bolt with Captive Washer

Socket Head Cap Bolt with Captive Washer Application Scenario Table

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