DIN 5299 Spring Snap Hooks: Standard & Design
DIN 5299:1980-10 is the German standard titled “Snap hook half-round wire, round wire and forged.” On this page, DIN 5299 identifies the standardized snap-hook family and dimensional concept. Because requirements can vary by form, material and manufacturing route, confirm the exact drawing, material grade, surface finish and load data for the ordered item rather than selecting by overall length alone.
Spring-Loaded Gate and Available Configurations
The spring-loaded gate opens inward for quick attachment and returns to the closed position when released. This makes the hook practical for connection points that are opened and closed repeatedly without a separate removable pin. Depending on the ordered configuration, eyelets or locking features may be available. If your project calls for a specific DIN 5299 form, send the form designation or drawing with your inquiry so availability can be checked against the production specification.
DIN 5299 Snap Hook Sizes & Dimensions
Standard sizes shown on this page run from 4×40 mm through 15×200 mm. The first number identifies the nominal body or wire diameter and the second the overall length. Use the dimensional drawing together with the A, B, C, D and L values to check gate clearance, connection geometry and fit with the rope, chain, cable or attachment point. For replacement parts, compare every relevant dimension rather than relying on nominal size alone.
Selection tip: start with the mating component. Measure the opening and the space available around the connection point, then confirm body diameter, overall length and the clearance needed for the gate to open and close fully. If the existing part is being replaced, send a photo beside a ruler or caliper together with the required load information.
| SIZE | A | B | C | D | L | WLL | WEIGHT(KG/100PCS) |
| MM | MM | MM | MM | MM | MM | LBS | NORMAL |
| 4×40 | 20 | 6 | 6 | 4 | 40 | 100 | 0.8 |
| 5×50 | 25 | 6 | 7 | 5 | 50 | 160 | 1.6 |
| 6×60 | 30 | 9 | 7 | 6 | 60 | 260 | 2.8 |
| 7×70 | 35 | 10 | 10 | 7 | 70 | 335 | 4.5 |
| 8×80 | 40 | 11 | 11 | 8 | 80 | 400 | 6.3 |
| 9×90 | 45 | 13 | 11 | 9 | 90 | 500 | 9.4 |
| 10×100 | 50 | 16 | 12 | 10 | 100 | 650 | 12.5 |
| 11×120 | 57 | 18 | 19 | 11 | 120 | 700 | 19.2 |
| 12×140 | 67 | 20 | 20 | 12 | 140 | 800 | 25.8 |
| 13×160 | 74 | 22 | 29 | 13 | 160 | 1300 | 35.1 |
| 14×180 | 86 | 22 | 42 | 14 | 180 | 1600 | 45.5 |
| 15×200 | 90 | 26 | 42 | 15 | 200 | 1800 | 61.8 |
Steel & Stainless Steel DIN 5299 Snap Hooks
Choose the material and finish for the working environment, not just appearance. Carbon steel is a practical option for general industrial service and can be supplied with a protective galvanized finish. Stainless steel is better suited to wet, outdoor or corrosive environments where rust resistance matters. If chloride exposure or a specific stainless grade such as AISI 304 or 316 is important, state the required grade in the RFQ so it can be confirmed for the selected size before production.
Galvanized Steel Snap Hooks
For carbon-steel models, galvanizing adds a zinc layer that improves corrosion protection in normal outdoor and industrial service. When coating performance is a purchase requirement, specify the required finish and any coating-thickness or salt-spray requirement instead of ordering by the word “galvanized” alone.
Stainless Steel Snap Hooks
Stainless steel snap hooks are a better fit for wet, marine and wash-down environments where corrosion resistance is a priority. Grade, finish and any polishing or passivation requirement should be written into the purchase specification. For dedicated marine configurations, compare the stainless steel marine snap hook range before choosing the DIN 5299 model.
Working Load Data & Product Selection
The current product table publishes WLL values from 100 lb for 4×40 mm up to 1,800 lb for 15×200 mm. Before using those figures in a purchase specification, confirm the exact material, manufacturing route and test basis for the ordered model. “Heavy duty” is not a load rating by itself. Select the connector from verified working-load, proof-load or breaking-load data that applies to the exact part supplied.
Check these points before ordering:
• nominal size and all critical dimensions
• load direction and connection geometry
• verified WLL, proof-load or breaking-load basis
• carbon steel or stainless steel grade
• galvanized, polished or other specified finish
• fit with the rope, chain, cable or mating hardware
• inspection, material-certificate and traceability requirements
| SIZE | A | B | C | D | L | WLL | WEIGHT(KG/100PCS) |
| MM | MM | MM | MM | MM | MM | LBS | NORMAL |
| 4×40 | 20 | 6 | 6 | 4 | 40 | 100 | 0.8 |
| 5×50 | 25 | 6 | 7 | 5 | 50 | 160 | 1.6 |
| 6×60 | 30 | 9 | 7 | 6 | 60 | 260 | 2.8 |
| 7×70 | 35 | 10 | 10 | 7 | 70 | 335 | 4.5 |
| 8×80 | 40 | 11 | 11 | 8 | 80 | 400 | 6.3 |
| 9×90 | 45 | 13 | 11 | 9 | 90 | 500 | 9.4 |
| 10×100 | 50 | 16 | 12 | 10 | 100 | 650 | 12.5 |
| 11×120 | 57 | 18 | 19 | 11 | 120 | 700 | 19.2 |
| 12×140 | 67 | 20 | 20 | 12 | 140 | 800 | 25.8 |
| 13×160 | 74 | 22 | 29 | 13 | 160 | 1300 | 35.1 |
| 14×180 | 86 | 22 | 42 | 14 | 180 | 1600 | 45.5 |
| 15×200 | 90 | 26 | 42 | 15 | 200 | 1800 | 61.8 |
Industrial Applications for DIN 5299 Spring Snap Hooks
DIN 5299 snap hooks are useful where a compact spring gate simplifies repeated attachment and removal. Typical non-life-safety applications include securing general equipment, connecting ropes or light chain assemblies, temporary cable attachments, marine deck hardware and other industrial fastening tasks where the selected size, material and verified load rating are appropriate.
Application Limits
Use the hook only in the load direction and service conditions covered by the product specification. Avoid side loading, gate loading, deformed mating parts and connections that prevent the gate from closing fully. For personnel protection, fall arrest, climbing, rescue or overhead lifting, use a connector specifically designed, tested and documented for that duty.
Manufacturing, Inspection & Batch Control
Consistent DIN 5299 supply depends on dimensional control as much as material choice. For production orders, the inspection plan should cover body diameter, overall length, gate opening and closure, surface condition and any specified load test.
Bulk orders can also be matched to batch identification, packaging and customer-specific labeling requirements. If you need material certificates, dimensional inspection reports, coating records, samples or third-party inspection, list those requirements before order confirmation so they can be included in the production plan.
OEM & Bulk DIN 5299 Snap Hooks
Powerful Machinery supports standard and custom DIN 5299 snap hook orders for distributors, rigging-hardware buyers and OEM programs. Send the target size, material, finish, quantity, destination and drawing or sample if available. We will use those details to confirm the closest standard item or review a custom requirement.
For repeat orders, keep the approved drawing and inspection criteria with the purchase order to reduce specification drift between batches.
DIN 5299 Snap Hook FAQs
What is DIN 5299?
DIN 5299:1980-10 is the current DIN standard titled “Snap hook half-round wire, round wire and forged.” For purchasing, the standard designation should be used together with the required form or drawing, dimensions, material, finish and performance data for the exact hook.
What DIN 5299 snap hook sizes are available?
The current range on this page covers 4×40, 5×50, 6×60, 7×70, 8×80, 9×90, 10×100, 11×120, 12×140, 13×160, 14×180 and 15×200 mm. Use the full dimensional table and drawing to confirm fit rather than choosing by overall length alone.
Are carbon steel and stainless steel snap hooks available?
The current product range lists carbon steel and stainless steel options. Specify the required material and finish in the inquiry. If a particular stainless grade or coating specification is mandatory, ask for confirmation on the selected size before ordering.
Can I order AISI 304 or 316 stainless steel?
If your application requires AISI 304 or AISI 316, state the grade in the RFQ. Grade availability should be confirmed for the selected DIN 5299 size and configuration before production.
Are DIN 5299 snap hooks heavy duty?
“Heavy duty” is a general description, not a standardized load value. Choose the hook by verified WLL, proof-load or breaking-load data for the exact size, material and manufacturing specification. If your application has a required load, include it in the RFQ.
Can DIN 5299 snap hooks be used for fall protection or overhead lifting?
Do not assume that a DIN 5299 designation alone provides approval for fall arrest, climbing, rescue or overhead lifting. Use a connector specifically certified, tested and documented for the required life-safety or lifting application.
Can sizes, finishes or packaging be customized?
Custom size, finish, marking and packaging requests can be reviewed for OEM or bulk orders. Send the drawing, quantity and acceptance criteria with the inquiry. Any custom load requirement must be confirmed through the appropriate engineering and test process.
What information should I send for a quote?
Send the required size or drawing, material, finish, quantity, application, required load data, inspection or certificate requirements and delivery destination. A sample or clear photo is helpful when replacing an existing hook.
Snap hook or quick link: which should I choose?
Choose a snap hook when frequent connection and release through a spring gate is the priority. Choose a threaded quick link when the connection is intended to stay closed for longer periods and the threaded closure suits the application. In either case, match the connector geometry, material and verified load data to the job.
How do I choose the right snap hook size?
Check body diameter, overall length, gate opening and the mating component first. Then confirm the load basis and service environment. A dimensional drawing is more reliable than choosing by nominal length alone.
