The Screw Pin Anchor Shackle, commonly referred to as a Bow Shackle, is a versatile rigging connector featuring a wide, rounded body designed to accommodate multi-directional loading and multiple sling legs.
Rapid Fastening: Features a threaded pin that can be quickly tightened by hand and secured with a tool, making it highly efficient for frequent "pick and place" tasks.
Multi-Directional Capability: The curved bow design safely accommodates angular and side-loading, though such uses require a standard reduction in the Working Load Limit (WLL).
Spacious Profile: The wider "O" shaped body provides ample clearance to connect larger hooks, thick synthetic slings, or multiple chain legs simultaneously.
Secure Seating: Engineered so that when properly installed, the shoulder of the screw pin makes full, flush contact with the shackle ear to ensure optimal load distribution.
Versatile G209 Pattern: Manufactured to the industry-standard G209 dimensions. The wide "Bow" or "Omega" shape allows for side loading and accommodates wider crane hooks or multiple sling legs without bunching.
Quick Connection: The Screw Pin design enables fast, tool-free installation and removal, making it ideal for temporary rigging and "pick and place" operations.
Side Load Rated: Unlike Chain (Dee) shackles, these Anchor Shackles are designed to handle angles. (Note: WLL reduction applies for angles > 0°).
Superior Durability: Drop-forged carbon steel body with a high-strength alloy steel pin, quenched and tempered for a 6:1 Safety Factor.
Corrosion Resistance: Available in Hot Dip Galvanized (HDG) finish for long-lasting protection in marine and outdoor environments.
Technical Guide: Side Loading Capabilities
Unlike D-Shackles, Anchor (Bow) Shackles are designed to handle loads from the side. However, the Working Load Limit (WLL) must be reduced according to the angle.
Angle from Vertical (In-Line)
Adjusted WLL (Remaining Capacity)
0° - 5°
100% of Rated WLL
45°
70% of Rated WLL
90°
50% of Rated WLL
Pro Tip: When side loading, always ensure the load is centered on the bow, not the pin. The pin should never rotate under load. If the pin might rotate, use a Bolt Type Shackle instead.
Comparison: Screw Pin vs. Bolt Type
Use Screw Pin (This Product): for temporary jobs, frequent changes, and static lifts.
Use Bolt Type: for permanent installations, overhead lifting where the load might slide/rotate, or high-vibration environments.
Technical Specifications
*Refer to table below for dimensions A-L
Item No.
Size (inch)
WLL (ton)
Dimensions (mm)
Weight (kg)
Product Code
A
B
C
D
E
L
SH01005
3/16"
1/3
9.7
6.4
22.4
4.8
15.2
37.3
0.022
701001005
SH01006
1/4"
1/2
11.9
7.9
28.7
6.4
19.8
46.7
0.05
701001006
SH01008
5/16"
3/4
13.5
9.7
31
7.9
21.3
53
0.08
701001008
SH01010
3/8"
1
16.8
11.2
36.6
9.7
26.2
63
0.135
701001010
SH01011
7/16"
1-1/2
19.1
12.7
42.9
11.2
29.5
74
0.195
701001011
SH01013
1/2"
2
20.6
16
47.8
12.7
33.3
83.5
0.3
701001013
SH01016
5/8"
3-1/4
26.9
19.1
60.5
15.7
42.9
106
0.61
701001016
SH01019
3/4"
4-3/4
31.8
22.4
71.5
19.1
51
126
1.03
701001019
SH01022
7/8"
6-1/2
36.6
25.4
84
22.4
58
148
1.6
701001022
SH01025
1"
8-1/2
42.9
28.7
95.5
25.4
68.5
167
2.3
701001025
SH01029
1-1/8"
9-1/2
46
31.8
108
29.5
74
190
3.2
701001029
SH01032
1-1/4"
12
51.5
35.1
119
32.8
82.5
210
4.4
701001032
SH01035
1-3/8"
13-1/2
57
38.1
133
36.1
92
233
6.2
701001035
SH01038
1-1/2"
17
60.5
44.5
146
38.9
98.5
254
7.8
701001038
SH01044
1-3/4"
25
73
51
178
46.7
127
313
13.8
701001044
SH01050
2"
35
82.5
57
197
52.8
146
348
20.5
701001050
SH01063
2-1/2"
55
105
70
267
69.1
184
453
39
701001063
Anchor Shackles & Chain Shackles
Safety, Selection & Usage Guide
Bolt Type Chain Shackle
Screw Pin Anchor Shackle
Bolt Type Anchor Shackle
Safety Guidelines
Always
Store and handle shackles correctly.
Inspect shackles before use and before placing into storage.
Select the correct pattern of shackle (Dee/Bow) and pin type for the application.
Fully tighten the pin before lifting.
Ensure the load acts through the centre line of the shackle.
Allow for the full resultant imposed load (consider angles).
Never
Use shackles with bent pins or deformed bodies.
Force, hammer, or wedge shackles into position.
Eccentrically load shackles (side loading).
Replace the pin with a standard bolt.
Fit pins in contact with moving parts which may unscrew them.
Shock load shackles.
Selection & Operation Guide
Selecting the Correct Shackle
Type: Use Anchor (Bow) shackles for multi-leg systems or where side loading may occur. Use Chain (Dee) shackles for straight-line pulls.
Pin Type: • Screw Pin: Suitable for general, non-permanent purposes. • Bolt Type (Safety Pin): Essential for long-term installations or where the pin may rotate under load.
⚠️ CAUTION: Loading on the Pin BS and ISO Standard shackles are rated for the pin to accept a central point load. Unless stated otherwise, assume the jaw must be fully filled and the load evenly distributed across the full pin width.
Using Shackles Safely
Avoid Side Loading: Position the shackle so the body takes the load along its center line. Use spacers if necessary to center the load on the pin.
Tightening: Tighten screw pins by hand, then lock with a small bar. Do not overtighten to the point of deforming the body. For bolt types, ensure the split cotter pin is fitted.
Choke Hitches: Place the pin through the eye of the sling. Never place the pin in contact with the "bight" of the choke or moving parts, as friction can unscrew the pin.
Maintenance & Storage
Storage: Store in a clean, dry place protected from corrosion. Never modify or galvanize a shackle without supplier approval.
Inspection: Check regularly for: distorted/stretched bodies, bent pins, damaged threads, nicks, gouges, or corrosion. illegible markings. If any defect is found, refer to a Competent Person.
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