HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory
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Product Highlights
- Tamper-Proof Security: Shears off at predetermined torque to prevent unauthorized removal or machinery damage.
- Standard Tool Installation: Requires only standard spanner or socket; no specialized equipment needed.
- Wide Material Options: Available in Carbon Steel, Stainless Steel (SS304/316), Alloy Steel, Brass, and Titanium.
- Customizable Head Mark: Head Mark is fully customizable to meet specific branding or identification needs.
- Flexible Thread Length: Options include Full Thread or Half Thread to suit various application requirements.
- Extensive Size Range: Sizes available from M3 to M100, covering metric and imperial specifications.
- Low Stockout Rate: Stockout rate under 0.1% with real-time monitoring and free upgraded alternatives.
- Free Technical Support: Dedicated 1v1 engineer team provides free installation guidance and drawing optimization.
Product Attributes
- Customization
- Available
- Material
- Carbon Steel, Stainless Steel, Alloy Steel
- Type
- Hexagon Head
- Connection
- Common Bolt
- Head Style
- Hexagonal
- Standard
- DIN, ANSI, GB, JIS, BSW, GOST
- Grade
- 4.8/8.8/10.9/12.9
- Application
- Machinery, Chemical Industry, Environmental, Building
- Finish
- Black/Yzp/Bzp/HDG/Dacromet/Plain
- Delivery
- 5-10 Days in Stock, 10-30 Days Not in Stock
- Head Mark
- Customized
- Thread Length
- Full Thread/Half Thread
- Size
- M3-M100
- Customized
- Yes
- Transport Package
- Plastic Bags+Cartons+Pallets
- Specification
- as Request
- Trademark
- LS or Customized
- Origin
- Hebei, China
- HS Code
- 731815
- Production Capacity
- 50 Million Tons/Month
- Package Size
- 24.40cm * 12.00cm * 12.00cm
- Package Gross Weight
- 25.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory
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HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory -
HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory -
HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory -
HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory -
HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory -
HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory -
HDG ASTM A325tc Torsional Shear Bolt / American Standard Torsional Shear Type High Strength Bolt/Black/Hot DIP Galvanized Bolt Inventory
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Product Description
PRODUCT PARAMETER
Shear Bolt
Shear Bolt (or snap-off bolt) is a one-way security fastener with dual functions: anti-tampering and equipment protection. It breaks at a predetermined torque to prevent unauthorized removal or machinery damage from overload.
Design & Materials
Structure: Features a hexagonal drive head that shears off after full tightening, leaving no grip for removal.
Materials: A2 stainless steel, zinc-plated carbon steel, or galvanized steel (corrosion-resistant for indoor/outdoor use).
Specs: Thread sizes M6–M12 (metric), 1/8–1 1/8 inch (imperial); available in button or countersunk head styles.
Installation
Tighten with a standard spanner/socket (no special tools needed).
When torque reaches the shear point, the hexagonal drive head snaps off.
The remaining bolt head is tamper-proof, forming a permanent fixing.
Key Applications
Anti-tampering: Public facilities (street furniture, fencing), banks, prisons, and outdoor fixtures.
Equipment Protection: Agricultural machinery (PTO shafts), industrial gearboxes, and conveyor systems (prevents overload damage).
Advantages
Tamper-proof: No way to remove after installation.
Equipment protection: Breaks to avoid overload damage (like a "mechanical fuse").
Easy installation: Uses standard tools, no specialized equipment.
Cost-effective: Affordable security and safety solution.
Design & Materials
Structure: Features a hexagonal drive head that shears off after full tightening, leaving no grip for removal.
Materials: A2 stainless steel, zinc-plated carbon steel, or galvanized steel (corrosion-resistant for indoor/outdoor use).
Specs: Thread sizes M6–M12 (metric), 1/8–1 1/8 inch (imperial); available in button or countersunk head styles.
Installation
Tighten with a standard spanner/socket (no special tools needed).
When torque reaches the shear point, the hexagonal drive head snaps off.
The remaining bolt head is tamper-proof, forming a permanent fixing.
Key Applications
Anti-tampering: Public facilities (street furniture, fencing), banks, prisons, and outdoor fixtures.
Equipment Protection: Agricultural machinery (PTO shafts), industrial gearboxes, and conveyor systems (prevents overload damage).
Advantages
Tamper-proof: No way to remove after installation.
Equipment protection: Breaks to avoid overload damage (like a "mechanical fuse").
Easy installation: Uses standard tools, no specialized equipment.
Cost-effective: Affordable security and safety solution.
Thread Specification | M12 | M16 | M20 | (M22) | M24 | (M27) | M30 | M36 |
P (Pitch) | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 |
da (Maximum) | 15.2 | 18.83 | 24.4 | 26.4 | 28.4 | 32.84 | 35.84 | 42.4 |
ds (Maximum) | 12.7 | 16.43 | 20.52 | 22.52 | 24.52 | 27.84 | 30.84 | 37 |
ds (Minimum) | 11.3 | 15.57 | 19.48 | 21.48 | 23.48 | 26.16 | 29.16 | 35 |
dk (Maximum) | 22 | 30 | 37 | 41 | 44 | 50 | 55 | 67 |
d_w (Minimum) | 20.9 | 27.9 | 34.5 | 38.5 | 41.5 | 42.8 | 46.5 | 58.5 |
de (≈) | 10 | 13 | 17 | 18 | 20 | 22 | 24 | 30 |
k (Nominal) | 8 | 10 | 13 | 14 | 15 | 17 | 19 | 23 |
k (Maximum) | 8.8 | 10.75 | 13.9 | 14.9 | 15.9 | 17.9 | 20.05 | 24.05 |
k (Minimum) | 7.2 | 9.25 | 12.1 | 13.1 | 14.1 | 16.1 | 17.95 | 21.95 |
r (Minimum) | 1.2 | 1.2 | 1.2 | 1.2 | 1.6 | 2 | 2 | 2 |
d_b (Nominal) | 7.7 | 11.1 | 13.9 | 15.4 | 16.7 | 19 | 21.1 | 25.4 |
d_b (Maximum) | 8 | 11.3 | 14.1 | 15.6 | 16.9 | 19.3 | 21.4 | 25.7 |
d_b (Minimum) | 7.4 | 11 | 13.8 | 15.3 | 16.6 | 18.7 | 20.8 | 25.1 |
d_c (≈) | 8.36 | 12.8 | 16.1 | 17.8 | 19.3 | 21.9 | 24.4 | 29.36 |
d0 (≈) | 6.9 | 10.9 | 13.6 | 15.1 | 16.4 | 18.6 | 20.6 | 25.6 |
k1 (Minimum) | 11 | 12 | 14 | 15 | 16 | 17 | 18 | 25 |
k2 (Maximum) | 16 | 17 | 19 | 21 | 23 | 24 | 25 | 33 |
Approx. Weight per 1000 Pcs (kg) | - | - | - | - | - | - | - | - |
Material | Corrosion Resistance | Temperature Resistance | Magnetic | Applications |
Carbon Steel | Low | -20°C to 300°C (-4°F to 572°F) | Yes | General purpose, construction, indoor machinery, automotive. |
Alloy Steel | Low to Medium | -50°C to 450°C (-58°F to 842°F) | Yes | High-strength & high-load applications: engines, heavy machinery, structural bolts. |
SS304 Stainless Steel | Good | -196°C to 800°C (-321°F to 1472°F) | No | Food processing, kitchen equipment, chemical equipment, architectural fixtures. |
SS316 Stainless Steel | Excellent | -196°C to 800°C (-321°F to 1472°F) | No | Marine environments, chemical processing, medical implants, coastal structures. |
Brass | Good | -20°C to 200°C (-4°F to 392°F) | No | Electrical applications, plumbing and pipe fittings, decorative purposes. |
Aluminum Alloy | Good | -200°C to 150°C (-328°F to 302°F) | No | Lightweight applications: aerospace, racing, drones, bicycles. |
Titanium Alloy | Excellent | -200°C to 600°C (-328°F to 1112°F) | No | High-end aerospace, medical implants, performance racing, chemical industry. |
Nylon (Plastic) | Excellent | -40°C to 85°C (-40°F to 185°F) | No | Electrical insulation, lightweight fastening, chemical resistance, electronics. |
ABOUT US
LONGSHI FASTENERS MANUFACTURING CO.,LTD.,
Longshi Fastener Manufacturing Co., Ltd., founded in 2008, is located in Shahe City, Hebei Province, close to the country's largestLarge fastener industrial cluster - Yongnian standard parts Industrial Park. The company headquarters covers an area of 21 thousand square meters, the annual output value of 200 million yuan, with more than 200 employees, with domestic More than 100 sets of advanced production equipment. It is a "manufacturing + service" type enterprise integrating fastener production, intelligent warehousing and e-commerce sales. The company's construction of the sea screw e-commerce park is located in Yongnian District, Handan City, Hebei Province, covers an area of 45 acres, the park planning and construction of office area, production area, packaging area, storage area, etc., to provide fastener production, packaging, warehousing, e-commerce sales and other services. Longshi mainly produces high quality and high strength fasteners, and "Longshi" screws have become a well-known brand in the industry. Longshi always adhere to quality first, reputation first. From raw material procurement, design and development, production and processing to products strict quality control is implemented in every link of quality testing and sales to win the recognition of our customers. The company has established standardized product testing laboratories and quality testing processes and standards to ensure that products strictly comply with national standards.
Items | Hex Flange Nut/ Hex Nut/Nylon Insert Nut/Rivet Nut/Wing Nut/Spring Nut/Square Nut...... |
Material | Stainless Steel A2 A4 A8/Carbon Steel/Brass/Alloy Steel |
Grade | A2-70 A2-80 A4-70 A4-80 A8; Class 4/5/6/8/10/12;Grade 2/5/8 |
Standard | DIN;ISO;ASME;GB;BS;IFI;GOST....and customised |
Surface | Black;Zinc Plate;Dacromet;Ruspert;Magni;Zinc-Nickel;Plain;HDG |
Package | Box;Plastic Bag;Plastic Bucket;Blister Box;Pallet Carton... |
Sample | Available |
EU CBAM | Available |
Items | U Bolt/Hex Flange Bolt/ Hex bolt/Hammer Bolt/Socket Bolt/Carriage Bolt/Hanger Bolt/Wing Bolt/Eye bolt/Weld bolt/Clinch Bolt/ Thread Bar/Thread Rod |
Material | Stainless Steel A2 A4 A8/Carbon Steel/Brass/Alloy Steel |
Grade | A2-70 A2-80 A4-70 A4-80 A8; Class 4.6/4.8/5.6/6.8/8.8/10.9/12.9;Grade 2/5/8 |
Standard | DIN;ISO;ASME;GB;BS;IFI;GOST....and customised |
Surface | Black;Zinc Plate;Dacromet;Ruspert;Magni;Zinc-Nickel;Plain;HDG |
Package | Box;Plastic Bag;Plastic Bucket;Blister Box;Pallet Carton... |
Sample | Available |
EU CBAM | Available |
Items | Chipboard Screw/ Wood Scew/ Roofing Screw/Decking Screw/ Facade Screw/Drywall Screw/Set Screw/Drilling Screw/ Euro Screw/ Window Screw/ Bimetal |
Material | Stainless Steel C1 A2 A4 /Carbon Steel/Brass/Alloy Steel |
Grade | A2-70 A2-80 A4-70 A4-80 |
Standard | DIN;ISO;ASME;GB;BS;IFI;GOST....and customised |
Surface | Black;Zinc Plate;Dacromet;Ruspert;Magni;Zinc-Nickel;Plain;HDG |
Package | Box;Plastic Bag;Plastic Bucket;Blister Box;Pallet Carton... |
Sample | Available |
EU CBAM | Available |
FAQ
Q1: What is your minimum order quantity (MOQ)? Do you charge extra for small orders?
100 pieces MOQ (most peers require 1,000+), no price premium for small orders. First-time customers for cross-border e-commerce/trade get free samples.
Q2:Do you support custom orders? How long does the customization process take?
Longshi Advantage: 8-dimensional customization (material, specification, surface treatment, etc.), with 3D design drawings + process plans.
Q3: What if an item is out of stock?
Stockout rate <0.1% (peers: 10+%), with real-time inventory monitoring. For extreme stockouts, free upgraded alternatives are provided (peers often leave clients waiting indefinitely).
Q4: Do you provide technical support, such as installation guidance or drawing optimization?
Dedicated 1v1 engineer team offering free technical support.
Q5:Can I visit your factory or arrange a factory audit?
Support online factory tours (real-time video of production lines/laboratories) and offline visits (pick-up service available).
100 pieces MOQ (most peers require 1,000+), no price premium for small orders. First-time customers for cross-border e-commerce/trade get free samples.
Q2:Do you support custom orders? How long does the customization process take?
Longshi Advantage: 8-dimensional customization (material, specification, surface treatment, etc.), with 3D design drawings + process plans.
Q3: What if an item is out of stock?
Stockout rate <0.1% (peers: 10+%), with real-time inventory monitoring. For extreme stockouts, free upgraded alternatives are provided (peers often leave clients waiting indefinitely).
Q4: Do you provide technical support, such as installation guidance or drawing optimization?
Dedicated 1v1 engineer team offering free technical support.
Q5:Can I visit your factory or arrange a factory audit?
Support online factory tours (real-time video of production lines/laboratories) and offline visits (pick-up service available).
About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASI256317". Items marked "
" are certified.
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Company Profile
Longshi Fastener Manufacturing Co., Ltd., founded in 2008, is located in Shahe City, Hebei Province, close to the country's largestLarge fastener industrial cluster - Yongnian standard parts Industrial Park. The company headquarters covers an area of 21 thousand square meters, the annual output value of 200 million yuan, with more than 200 employees, with domestic More than 100 sets of advanced production equipment. It is a "manufacturing + service" type enterprise integrating fastener production, intelligent warehousing and e-commerce sales. The company's construction of the sea screw e-commerce park is located in Yongnian District, Handan City, Hebei Province, covers an area of 45 acres, the park planning and construction of office area, production area, packaging area, storage area, etc., to provide fastener production, packaging, warehousing, e-commerce sales and other services. Longshi mainly produces high quality and high strength fasteners, and "Longshi" screws have become a well-known brand in the industry. Longshi always adhere to quality first, reputation first. From raw material procurement, design and development, production and processing to products strict quality control is implemented in every link of quality testing and sales to win the recognition of our customers. The company has established standardized product testing laboratories and quality testing processes and standards to ensure that products strictly comply with national standards.
About Our Factory & Business Background
-
Business Type
- Trading Company
- Address
- 12f Block C, Junlong Square, Heping District, Tianjin, China
-
Plant Area
- 20 square meters
-
Number of Employees
- 4
-
Registered Capital
- 1,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- CIF, FOB, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Tianjin Port
-
Minimum Order Quantity
- 1000 pcs
-
Supply Chain Partners
- 20
Our Production Capability & Technical Expertise
-
Main Products
- Screw, Bolts, Nuts, Nails, Tapping Screw, Hexagon Head Bolts, Round Head Bolts, Countersunk Bolts, Double End Studs, Rivets
-
QA/QC inspectors
- 1 people
-
Inspection Type for Finished Products
- Random inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Flexible customization, Minor Customization, Full Customization, Customization from Designs, Customization from Samples
-
R&D Engineers
- 1 people
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2024-09-02
-
Export Year
- 1 year
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 2
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Cooperated with Fortune 500
- No
FAQ
- What is your minimum order quantity (MOQ)? Do you charge extra for small orders?
- 100 pieces MOQ (most peers require 1,000+), no price premium for small orders. First-time customers for cross-border e-commerce/trade get free samples.
- Do you support custom orders? How long does the customization process take?
- Longshi Advantage: 8-dimensional customization (material, specification, surface treatment, etc.), with 3D design drawings + process plans.
- What if an item is out of stock?
- Stockout rate <0.1% (peers: 10+%), with real-time inventory monitoring. For extreme stockouts, free upgraded alternatives are provided (peers often leave clients waiting indefinitely).
- Do you provide technical support, such as installation guidance or drawing optimization?
- Dedicated 1v1 engineer team offering free technical support.
- Can I visit your factory or arrange a factory audit?
- Support online factory tours (real-time video of production lines/laboratories) and offline visits (pick-up service available).
Send your message to this supplier
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