Mantus Anchor Swivel

The Strongest Link in Your Chain

The strongest link – the Mantus anchor swivel is stronger than its corresponding Grade 40 chain. (WLL is 1/5 UBS)

Integrated swivel shackle design completely eliminates side loading, making this the safest anchor swivel on the market.

The pin on the chain side of the swivel is the strength-limiting part since the geometry of the chain determines the pin size. The Mantus anchor swivel and shackle is the first to feature an oblong pin to maximize the pin strength. With the aid of computer modeling and physical testing, we truly created a swivel that is the strongest link.

Note the innovative shackle bolt design – no shackle dog! This slim hex head design (with holes for safety wire) offers a slimmer profile making it easier for translating through your bow roller.

316 L Stainless Steel, Precision Cast and Electro-Polished Body
Pin made from Duplex Stainless Steel and is mechanically polished and electro-polished.

Mantus Anchor Swivel Specifications

Swivels are available in three sizes : S1 – S2 – S3
	Swivel Models	S1	S2	S3
	Imperial Chain	1/4 – 5/16	5/16 -3/8	3/8 -1/2
	Metric Chain	6mm – 8mm	8mm – 10 mm	10 mm – 14 mm
	UBS (Ulitmate Breaking Strength)	15,000 lb/ 6.8 T	21,700 lb/ 9.8 T	35,000 lb/ 16 T
These numbers are used to generate the recommendations below	WLL (Working load limit) (Safety Factor 5)	3000 lb/ 1.5 T	4,340 lb / 2 T	7,000 lb / 3.2 T
	PRICE	$105	$132	$252

Swivel Sizing Guide

	Chain Size (in)	1/4 (6 – 7mm)	5/16 (8mm)	3/8 (10mm)	7/16 (11mm)	1/2 (10 – 14mm)
Recommended swivel model for a given chain type and size	Grade 30 Chain	S1	S1	S2	S2	S3
	Grade 40 Chain (G4 HT)	S1	S1	S2	S3	S3
	Grade 70 Chain	S1	S2	S3	S3	NA
S1 swivel comes with 7/16 shackle (3/8 shackle optional, with a lower breaking strength) S2 swivel comes with 1/2 shackle (7/16 shackle optional, with a lower breaking strength) S3 swivel comes with 5/8 shackle (1/2 shackle optional, with a lower breaking strength)

Understanding your chain

Imperial Chain Type	G30 (Proofcoil/BBB) (lb) UBS / WLL / WLL inflated*	G40 HT (lb) UBS / WLL / WLL inflated*	G70 HT (lb) UBS / WLL / WLL inflated*
1/4	5,000 / 1,250	7750 / 1,938 / 2,600	9,450 / 2,350 / 3,150	UBS -Ultimate Breaking Strength (lb) WLL – Working Load Limit (lb) WLL Inflated* – Working Load Limit inflated using a a different safety factor than is standard. See note below.
5/16	7,600 / 1,900	11,600 / 2,900 /3,900	14100 / 3,500 / 4,700
3/8	10,600 / 2,650	16,200 / 4,100 / 5,400	19800 / 4,950 / 6,600
7/16	NA	21,600 / 5,400 / 7,200	26,250 / 6,560 / 8,750
1/2	18, 000/ 4,500	27,600 / 6,900 / 9,200	33,900 / 8,475 / 11,300
*Grade 40/70 chain types claim inflated working load limit values. Typically, chains working load limit is calculated as 1/4th of the ultimate breaking strength. Published WLL for Grade 70 /Grade 40 chain are calculated using the safety factor of 3, or UBS/3 = WLL. (G4 HT) is only 50% stronger than G30 chain and Grade 70 chain is only 20% stronger than G40 chain and 85% stronger than G30 chain. Thus, WLL values we use to size you with the correct swivel are WLL = UBS/4 regardless of the chain type. For Mantus Swivels, we use a safety factor of 5 when determining the WLL recommendations.