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Plain Eyebolt

If you wish to purchase custom products, please consider China Xiaoguo® custom Plain Eyebolt, which include full-size specifications, special materials and surface treatments. You can provide drawings or samples for production. The minimum order quantity is flexible and samples can be tested within 7 days.

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Product Description

How to extend the service life?

To extend the service life of the Plain Eyebolt, the key lies in correct selection, standardized installation, rational use, and regular maintenance.

【1】Correct selection

（1）Select the appropriate material and surface treatment based on the working conditions:

Environmental conditions	Recommended materials + Surface treatment
Indoor drying	Carbon steel + electro-galvanizing
Outdoor damp conditions	Carbon steel + hot-dip galvanizing (HDG) or 304 stainless steel
Coastal / High Salt Spray Resistance	316 Stainless Steel
High-temperature environment (>200°C)	Alloy steel (such as 35CrMo) + Dacromet coating
Low-temperature environment (below -20°C)	Alloy steel (with good impact toughness)

（2）Choose the correct load level: Ensure that the actual lifting weight does not exceed the working load limit (WLL) of the Plain Eyebolt, and leave sufficient safety margin.

（3）Confirm the matching of thread specifications: Ensure that the thread of the lifting ring bolt (such as M10×1.5) is exactly the same as the thread hole of the equipment.

Plain Eyebolt

【2】Standard installation

（1）Preparation of threaded holes

Thread hole depth: At least 1 times the thread diameter in steel; at least 1.5 - 2 times the diameter in cast iron and aluminum materials.

Clean the threads: Before installation, remove oil stains, iron filings, old thread adhesives and other debris from the thread holes.

（2）The correct tightening method

Using a torque wrench: Tighten according to the standard recommended torque value.

Strictly prohibited: Do not use impact wrenches or extension tubes to forcefully tighten.

Matching gasket: If the installation surface is not flat, a steel flat washer must be added.

（3）Threaded Anti-loosening and Lubrication

For situations where the components need to be disassembled repeatedly, you can apply molybdenum disulfide lubricating grease or anti-sticking agent (especially for stainless steel materials) on the threads.

Plain Eyebolt

Mon	M8	M10	M12	M16	M20	M24	M27	M30	M33	M36	M39
P	1.25	1.5	1.75	2	2.5	3	3	3.5	3.5	4	4
d1 max	8.036	10.036	12.043	16.043	18.043	22.052	25.052	28.052	30.052	32.062	35.062
d1 min	8	10	12	16	18	22	25	28	30	32	35
dk max	18	20	25	32	40	45	50	55	60	65	70
dk min	16.9	18.7	23.7	30.4	38.4	43.4	48.4	53.1	58.1	63.1	68.1
s max	11	14	17	19	24	28	30	34	38	41	46
s min	10.3	13.3	16.3	18.16	23.16	27.16	29.16	33	37	40	45
ds max	8	10	12	16	20	24	27	30	33	36	39

【3】Reasonable use

（1）Strictly adhere to the load direction restrictions.

Never allow any oblique pulling at any angle.

（2）Avoid impact loads and overloading.

When lifting or fixing, the load should be applied steadily to avoid sudden impacts.

Regularly weigh the lifted objects to ensure they do not exceed the WLL of the Plain Eyebolt.

（3）Avoid environmental corrosion that accelerates aging

After use in acidic, alkaline or salt spray environments, it should be promptly rinsed with clean water and dried.

For electro-galvanized products, avoid prolonged contact with chlorine-containing solutions (such as seawater and bleach).

【4】Regular maintenance

（1）Visual inspection before use (each time)

Check items	Normal state	Abnormal state
Ring shape	Circular, without deformation.	Obvious bending, twisting, and enlargement of the opening.
Surface condition	No cracks, no severe rusting.	Visible cracks, deep rust pits, extensive peeling of the coating.
Thread	Complete, without burrs	Loose teeth, wear and rust prevent smooth insertion
Identification	Clear and legible (WLL, specifications, etc.)	Blurry and illegible

（2）Regular professional inspection

Monthly: Use a torque wrench to re-torque the frequently used Plain Eyebolt.

Quarterly: Conduct MT or PT to inspect surface and near-surface cracks.

Each year: Conduct sampling for the guaranteed load test (1.5 times the WLL).

（3）Cleaning and Rust Prevention

After each use, wipe it clean with a clean cloth to remove dust and grease.

For carbon steel electro-galvanized products, apply anti-rust oil or anti-rust wax once a month.

When stored for a long time, it should be placed on a dry and ventilated shelf, and should not be stored in the same warehouse as corrosive chemicals.