The H-Lift BS 4278 Part 1 Collared Eye Bolt is a high-tensile lifting point compliant with British Standard 4278. Its integral collar design rests flush against the load surface, enabling safe angular loading capability unlike standard dynamo eye bolts. Suitable for heavy-duty lifting with sizes from M6 to M64.

Manufactured to BS 4278 Table 1 standard
Material: High-tensile Carbon Steel, hardened and tempered
Collared design supports angular loading (with WLL reduction)
Available Sizes: M6 (0.1t) to M64 (20t)
Ideal for general-purpose lifting where side loading may occur

Technical Data
Guide to Eye Bolts

H-Lift BS 4278 Table 1 Collared Eye Bolts are heavy-duty lifting points designed for industrial applications requiring high strength and reliability. Unlike standard dynamo eyebolts, the collared design features a wide shoulder that, when seated flush, permits safe angular (side) loading up to 45°, making them versatile for complex rigging setups.

📐 Angular Loading Capable

The reinforced collar allows for side loading up to 45° from vertical when properly seated, offering greater flexibility than plain pattern eyebolts.

🏗️ High Tensile Forged

Forged from High Tensile Carbon Steel (hardened and tempered) to provide superior ductility and a 5:1 Safety Factor for critical lifting.

📜 British Standard

Manufactured strictly to BS 4278 Table 1 specifications, ensuring consistent quality, dimensions, and load ratings.

📏 Massive Range

Available in a comprehensive range of Metric coarse threads from M6 up to M64, with Working Load Limits up to 20 Tons.

Q: What is the difference between BS 4278 Table 1 and Table 3 eyebolts?
A: Table 1 refers to Collared Eyebolts, which have a shoulder and can handle angular loads. Table 3 refers to Dynamo Eyebolts, which have no shoulder and are strictly for vertical (axial) lifting only.

Q: Can I use this eyebolt for side loading?
A: Yes, provided the collar is fully seated flush against the load surface and the load is derated according to the angle (e.g., capacity is reduced at 45°).

Working Load Limits (WLL) & Angular Derating

The BS 4278 standard provides specific "De-rating" factors. As the angle from vertical increases, capacity decreases. Never exceed 45° from vertical.

Thread Size	Vertical Pull (0°)	0° - 15° Angle	15° - 45° Angle
M10	0.25 Ton	0.20 Ton	0.06 Ton
M12	0.40 Ton	0.32 Ton	0.10 Ton
M16	0.80 Ton	0.64 Ton	0.20 Ton
M20	1.25 Tons	1.00 Ton	0.32 Ton
M24	2.00 Tons	1.60 Tons	0.50 Ton

Technical Specifications

Item No.	Size (A)	W.L.L. (ton)	Dimensions (mm)					Weight	Product Code
Item No.	Size (A)	W.L.L. (ton)	B	C	D	F	H	kg	Product Code
HK2506	M6	0.10	22	15	7	9	18	0.06	706003006
HK2508	M8	0.15	22	15	7	9	18	0.06	706003008
HK2510	M10	0.25	22	15	7	9	18	0.06	706003010
HK2512	M12	0.40	22	15	7	9	18	0.06	706003012
HK2516	M16	0.80	29	20	10	12	23	0.15	706003016
HK2518	M18	1.00	36	24	12	14	28	0.27	706003018
HK2520	M20	1.60	40	27	14	16	32	0.38	706003020
HK2522	M22	1.60	45	30	14	18	35	0.54	706003022
HK2524	M24	2.50	52	35	17	21	40	0.85	706003024
HK2527	M27	2.50	58	39	20	23	46	1.13	706003027
HK2530	M30	4.00	65	44	22	26	51	1.62	706003030
HK2533	M33	4.00	72	48	24	29	56	2.37	706003033
HK2536	M36	6.30	81	54	27	32	63	3.12	706003036
HK2539	M39	6.30	86	57	29	36	67	3.81	706003039
HK2545	M45	8.00	101	68	34	40	79	6.45	706003045
HK2552	M52	12.50	115	76	38	46	89	9.58	706003052
HK2556	M56	16.00	128	86	43	51	100	12.99	706003056
HK2564	M64	20.00	144	96	48	58	112	18.20	706003064

⚠️ INSTALLATION WARNING

Flush Seating: The collar must be in 100% contact with the machined face of the load. Gaps will cause bending failure.
Alignment: The plane of the eye must align with the pull direction. Use shims (max thickness 1/2 thread pitch) if needed.
Derating: Always reduce the WLL for angular lifts as per the table above. Never exceed 45° from vertical.

A Complete Guide to Eye Bolts

Types, Installation, Safety & Working Load Limits

What is an Eye Bolt?

An eye bolt is a mechanical fastener with a threaded shaft and a loop (eye) at one end. It is designed to be screwed into a structure or equipment to provide a secure lifting point or a tie-down point.

Eye bolts are critical components in rigging operations, allowing wire ropes, shackles, or cables to be attached to loads such as motors, containers, mold plates, and machinery for lifting, tensioning, or securing.

Main Types of Eye Bolts

Choosing the correct pattern is crucial for safety. The two most common types are:

Machinery Eye Bolt (Shoulder Pattern)

Features: Has a "shoulder" or "collar" between the eye and the threaded shank.

Use: Essential for angular lifting (lifting at an angle). The shoulder presses against the mating surface to support the bolt and prevent bending.

✔ Suitable for vertical and angular lifts (up to 45°).
✔ Most common in heavy industrial rigging.

Machinery Eye Bolt (Plain Pattern)

Features: No shoulder; the thread transitions directly to the eye.

Use: Designed strictly for vertical lifting only (in line with the bolt axis).

⚠ DANGER: Do not use for angular lifting. The shank can bend or break under side load.
✔ Lower cost, good for simple vertical pulls.

Nut Eye Bolt

Features: Designed to be passed through a hole and secured with a nut on the other side.

Use: Typically used when there is no pre-tapped hole available, such as through a beam or a post.

Screw Eye (Lag Eye)

Features: Has a coarse lag screw thread and a sharp point.

Use: Designed for screwing into wood or light duty anchors. Not for heavy machinery lifting.

Proper Installation Methods

The Golden Rule: Flush Seating

For Machinery Eye Bolts (Shoulder Pattern), the shoulder must sit completely flush and firm against the mating surface. If there is a gap, the bolt is acting as a lever and is significantly weaker.

Installation Steps:

Inspect the Hole: Ensure the tapped hole is clean, has good thread condition, and is deep enough for the full shank.
Check Surface: The area around the hole must be flat and clean to allow the shoulder to seat properly.
Screw In: Screw the eye bolt down until the shoulder contacts the load surface securely.
Alignment (Shimming): If the eye is not aligned with the direction of the pull, use a washer (shim) of the correct thickness under the shoulder to adjust the angle. Never unscrew the bolt to align it.
Engagement: Thread engagement length should be at least:
- 1.5x diameter for steel
- 2.5x diameter for aluminum/soft metals

Safety Precautions & Working Load Limits (WLL)

⚠ WARNING: Angular Lifting Reduces Capacity

Lifting at an angle significantly reduces the Working Load Limit (WLL) of an eye bolt. Plain pattern eye bolts must NEVER be used for angular lifts.

Reduction Factors for Shoulder Pattern Eye Bolts

When lifting at an angle, you must de-rate the bolt's capacity. Standard carbon steel eye bolts generally follow these guidelines:

Direction of Pull	Angle (from Vertical)	Remaining Capacity (% of WLL)
Vertical Pull	0°	100% WLL
Slight Angle	1° – 15°	55% - 80% WLL (Check Mfr Specs)
Standard Angular Lift	16° – 45°	25% - 30% WLL
Extreme Angle	> 45°	NOT RECOMMENDED (Use Swivel Hoist Ring)

*Note: Always consult the specific manufacturer's load chart, as values can vary by brand and material (e.g., DIN 580 vs. ASTM A489).

General Safety Checklist

Inspect before use: Look for bent shanks, cracks, nicked threads, or deformation of the eye. Destroy and replace damaged bolts.
No Side Loading: Never load an eye bolt perpendicular to the plane of the eye (side loading). This will bend the eye.
Do not modify: Never grind, machine, or weld an eye bolt, as this alters its thermal properties and strength.
Use Swivel Rings for Rotation: If the load needs to rotate or flip, use a Swivel Hoist Ring instead of an eye bolt to prevent unscrewing.

Materials and Finishes

Carbon Steel (Drop Forged): The industry standard for heavy-duty lifting. Usually heat-treated (normalized or quenched & tempered).
304 / 316 Stainless Steel: Essential for marine, food processing, or chemical environments. Note that stainless steel typically has a lower WLL than carbon steel of the same size.
Galvanized Finish: Provides a zinc coating for rust protection in outdoor applications.