SCHAEFER 51mm 5 Series Block - Swivel, 504-05 Block Configuration_Exit Block Large sheave diameter and high

Large sheave diameter and high working loads make them suitable for sheet and control blocks on medium to large offshore boats

blocks use 1/4" fasteners

Universal Head: brass bearing washer in head assembly provides smooth 360° rotation of post and shackle

(4) #10 RH fasteners

Harken 51mm Thru-Deck High-Strength Block allows lines through the deck and bulkhead

SCHAEFER 51mm 5 Series Block - Swivel, 504-05 Block Configuration_Exit Block Large sheave diameter and highSchaefer 5 Series single Aluminum Block with Delrin sheave ensures smooth operation with the high safe working load. Used extensively for sheet blocks on small to mid sized keelboats, and as control line blocks for larger offshore boats. Suitable as mast base or lead blocks on small to mid sized boats. Adaptable universal three way head. Black anodized aluminum or stainless steel cheeks. Stainless steel straps and posts.