Index | Use chart | 57 mm | 75 mm | 100 mm | 125 mm & 150 mm | Teardrop | Crossover | Mastbase Halyard Lead & Flip-Flop | Footblocks | AirRunners | Stainless Steel Runners | Opening Foot Blocks | Snatch | ESP Blocks | Stainless Steel ESP | Stainless Steel Blocks | Specifications

Big Boat blocks > Stainless Steel Runners

Harken stainless steel runner blocks feature computer-designed sideplates, and sheaves with hi-load composite/ball combination bearings.

Heads are offered with parallel/perpendicular shackles. Tangs attach turnbuckles, toggles and other fittings.

1855	Accepts tangs or shackle posts Computer designed sideplates Highly polished stainless steel Hi-load sheaves Legal for all rating rules

737

1853

1863

740

747

1857 1858

1862

1859 1861

Shackle Post

Runner Blocks

Part No.	Description	Sheave		Length		Weight		Clevis pin		Max Line		Safe working load		Breaking strength
		in	mm	in	mm	oz	g	in	mm	in	mm	Ib	kg	Ib	kg
737	Single	3	76	4 7/8	124	14	397	1/2	12.7	9/16	14	5000	2268	10000	4544
1853	Single	4	102	6 1/8	156	21	595	9/16	14.3	9/16	14	6250	2835	12500	5670
1855	Single	5	127	7 3/4	197	44	1247	11/16	17.5	5/8	16	9500	4310	19000	8618
1863	Single/becket	4	102	7 5/16	186	27	768	9/16	14.3	9/16	14	6250	2835	12500	5670

Heads Perpendicular Part No. Parallel Part No. Weight oz g 740 740 7 198 1859 — 10 280 1861 1862 13 369

Tangs Tang Part No. Weight Runner pin Checkstay pin Fits oz g in mm in mm 747 3 85 7/16 11.1 1/4 6.35 737 1857 5 1/2 156 1/2 12.7 3/8 9.5 1853/1863 1858 9 255 5/8 16 7/16 11.1 1855

Index | Use chart | 57 mm | 75 mm | 100 mm | 125 mm & 150 mm | Teardrop | Crossover | Mastbase Halyard Lead & Flip-Flop | Footblocks | AirRunners | Stainless Steel Runners | Opening Foot Blocks | Snatch | ESP Blocks | Stainless Steel ESP | Stainless Steel Blocks | Specifications