APS - Springs, Boots & Stand-up Bases
Call Us: 800 - 729 - 9767

Harken Stand-Up Bases

Harken Stand-Up Bases

The H010 and H029 Ball Socket Swivel Bases allow blocks to swivel freely and pivot to a 45° angle. Bases may be fitted with springs but withouth them the block still won't hit the deck. Select blocks carefully as the maximum working load of either base is often less than suited blocks.

The H061 Stanchion Mount Base attaches blocks to 7/8" (22mm) or 1" (25mm) stanchions and pulpits and is often used to lead furling lines to the cockpit. Allows blocks to swivel and pivot for fair leads.

Use the H1573 Midrange Stand-Up Base with Midrange blocks. The low-profile design is ideal as a mastbase halyard lead block. Combine the H1573 with single Midrange ratchet or fiddle blocks. Doubles and Triples will fit the H1573 but their Safe Working Loads are higher than the base.

Part # Description Height Weight Base Dia. Inside Socket Pin Dia. Safe Working Load Breaking Strength Hole Spacing Blocks Suited
in mm oz g in mm in mm in mm lb kg lb kg in mm
H010 Ball Socket Stand Up Base* 1 3/4 44 3.0 85 2 1/8 54 3/8 10 3/16 5 400 181 1300 590 1 25 2.25", Little Fiddle, Ratchets
H029 Ball Socket Stand Up Base, Large* 2 51 4.0 113 2 1/8 54 7/16 12 1/4 6 400 181 1300 590 1 25 Fiddle, 3.00" Cruiser, Ratchets
H061 Stanchion Mount Base 1 1/4 32 2.0 57 - - 3/8 10 3/16 5 350 159 - - - - Bullet, Big Bullet, 2.25", Ratchets
H460 Hi-Load Ball and Socket 1 3/4 44 4 113 2 1/8 54 3/8 10 3/16 5 800 363 2500 1134     57mm Carbo
H461 Hi-Load Ball and Socket, Large 2 51 4.5 127 2 1/8 54 7-16 12 1/4 6 1000 454 2500 1134     75mm Carbo
H1634 MR Stand-Up Base 1 15/16 49 9.0 255 2 7/8 73 9/16 15 5/16 8 3500 1588 7000 3175 1 5/8 41 Midrange/Cruising ESP Blocks

* Fasteners Required are 4 #10FH (5mm FH)

H010 Ball Socket Stand-Up Base, 3/8 (10mm) Inside Socket Price: $42.73 H029 Ball Socket Stand-Up Base, Large, 7/16 (12mm) Inside Socket Price: $45.00
H061 Stanchion Mount Base, 3/8 (10mm) Price: $27.15 H1634 \MR & ESP Cruise Stand-Up Base, 9/16 (15mm) Inside Socket Price: $97.94
H460 Hi-Load Ball & Socket Price: $54.12 H461 Hi-Load Ball & Socket Base Large Price: $56.41


Harken Stand-Up Springs and Boots

Harken Stand-Up Springs and Boots

Springs are used to support blocks on padeyes, eyestraps, bases and traveler cars. Keeps blocks from hitting the deck. Use the HSB2 Spring Cup with the H071 Stand-Up Spring to keep the spring in place on a block. The HSB2 has a hole for the block post. Sold separately.

The H077 DN Adaptor uses an H071 spring and the base has a 1/4" (6mm) Base Pin that spans a 1/2" (12mm) gap The block pin, for replacing the shackle on the block, is 3/16" (5mm) and spans a gap of 9/32" (7mm).

Stand-Up Boots are made of durable, flexible PVC and hold blocks up without snagging lines.

Part # Description Weight Height Diameter Suits
oz g in mm in mm
H097 Stand-Up Spring, Small 0.13 3.7 1 25 3/4 19
H071 Stand-Up Spring 0.32 9.1 2 51 7/8 22
H1603 Stand-Up Spring, Midrange 0.74 21 2 1/2 64 1 3/8 35
H077 DN Adaptor (Spring w/ Swivel Mount) 2.40 69 - - - -
H369 Stand-Up Boot, Small 0.45 12.7 2 51 1 9/16 40 40 and 47mm Carbo & Black Magic
H370 Stand-Up Boot, Large 1.10 30.8 2 5/8 67 2 3/16 55 75mm Carbo
HSB2 Spring Cup for H071 Spring - - 1/8 3 1 1/4 33 H071


H071 Stand Up-Spring Price: $1.01 H077 DN Adapter (Spring w/ Swivel Mount) Price: $47.04
H097 Small Stand-Up Spring, Small Price: $0.77 H1603 MR Stand-Up Spring Price: $2.90
H369 Stand-Up Boot, Medium, Black PVC Price: $10.34 H370 Stand-Up Boot, Large, Black PVC Price: $12.41
HSB2 Spring Cup for H071 Spring Price: $1.00


Selden Standup Springs

Selden Standup Springs

Stand Up Springs can support deck mounted blocks. Different springs correspond with different types of blocks.

Part # Dimension Weight Combine With
oz g
SLD308074R Ø36.5x70 0.67 19 Plain Bearing Block 50
SLD308085R Ø50x85 1.72 49 Plain Bearing Block 60/70, Roller Bearing Block 60
SLD308093R Ø60x100 2.68 76 Plain Bearing Block 80
SLD403123R Ø20/16-25 0.07 2 Ball Bearing Block 20/30
SLD433411R Ø30/20-40 0.07 2 Ball Bearing Block 40


SLD308074R Stand Up Spring for PBB 50 Price: $7.00 SLD308085R Stand Up Spring for PBB 60, PBB 70 & RBB 60 Price: $9.00
SLD308093R Stand Up Spring for PBB 80 Price: $13.00 SLD403123R Stand Up Spring for BBB 20 & BBB 30 Price: $2.00
SLD433411R Stand Up Spring Price: $4.00


Ronstan Stand-Up Springs

Ronstan Stand-Up Springs

Stand up bases and springs for various Ronstan block ranges. Made of Grade 316 stainless steel. The RF2455 Stand up Base features a clatter free rubber boot which you can attach the Dyneema link so that the block is aligned with or across the base. It's a neat, low profile solution.

Part # Description Dimensions (A) Dimensions (B) Dimensions (C) Dimensions (D) Weight Suits
in mm in mm in mm in mm oz g
RF318 Tapered Stand-Up Spring, Small - - 21/32 16.5 7/8 22 3/64 1.2 0.1 3 Series 20
RF319 Stand-Up Spring, Small - - 1-1/4 32 25/32 20 5/64 2 0.1 3 Smart Ratchets
RF321 Tapered Stand-Up Spring, Medium - - 1-9/16 40 1-1/8 28 5/64 2 0.3 9 Series 20
RF324 Stand-Up Spring 17/32 45.3 2-3/8 60 3-3/16 81 1/8 3.5 2.8 80 Series 60, 70 and 100
RF2455 Stand Up Base Max Working Load 1,100 lbs (550kg) and Breaking Load of 2,200 lbs (1,000kg) 0.9 26 Series 55 BB and RT


RF2455 Stand Up Base: Series 55 BB & RT Blocks Price: $9.31 RF318 Tapered Stand-Up Spring, Small Price: $2.08
RF319 Stand-Up Spring, Small Price: $2.93 RF321 Tapered Stand-Up Spring, Medium Price: $3.78
RF324 Stand-Up Spring for Ronstan Series 60, 75, 100 Price: $68.81 RF94A Eye Strap - 40mm Smart Ratchet Price: $2.93


RWO Stand-Up Boots

RWO Stand-Up Boots

Great for use in place of stainless steel coil springs to better shed lines, prevent snags and keep blocks from hitting the deck. Made of flexible, gray PVC.

Part # Description Height Diameter Suits
in mm in mm
R1814 Stand-Up Boot, Small 1 3/4 45 1 1/2 38 Bullet Sized Blocks
R1815 Stand-Up Boot, Medium 2 1/2 63 2 1/4 57 Big Bullet Blocks Through 3 inch Blocks


R1814 Stand-Up Boot, Small, Gray PVC Price: $12.13 R1815 Stand-Up Boot, Large, Gray PVC Price: $15.44


Ronstan Stand-Up Base

Ronstan Stand-Up Base

Stand-up base accepts a 3/8" post and 3/16" pin. Works with all Ronstan Series 40 blocks with posts (ie. not loop heads) and with only the singles with posts from Ronstan's Series 50. Base is a rhombus, 51mm x 75mm (2" x 2 31/32") angle-to-angle.

Part # Description Post Pin MWL BL
in mm in mm kg lbs kg lbs
RF2450 Snap Shackle Head Adapter 3/8 9 3/16 5 500 1100 1135 2500


RF2450 Stand-Up Base Price: $36.51


Lewmar Block Upstands

Lewmar Block Upstands

Use these to turn blocks into stand-up blocks. The LW29904046 suits 40 and 50mm blocks. The LW29904050 suits 60mm blocks. The LW19811000 suits 60mm Synchro Blocks. The LW19821000 suits 72mm Synchro Blocks. The LW19831000 suits 90mm Synchro Blocks.

Part No. Size (mm) Description SWL Weight Base Dia.
kg lbs g oz mm in
LW29904046 50 Upstand Kit 400 990 24 0.8 30 1-3/16
LW29904050 60 Upstand Kit 400 990 24 0.8 45 1-3/4
LW198110 00 60 Syncro Block Upstand 800 1760 120 4 69 2-1/4
LW19821000 72 Syncro Block Upstand 1100 2420 130 4.5 69 2-1/4
LW19831000 90 Syncro Block Upstand 2000 4400 310 11 89 3-1/4


LW19811000 60mm Synchro Stand UP Deck Plate SZ1 Price: $63.75 LW19821000 72mm Synchro Stand Up Deck Plate SZ2 Price: $67.15
LW19831000 90mm Synchro Stand Up Deck Plate SZ3 Price: $94.69 LW29904046 40/50mm Standup Kit Price: $11.48
LW29904050 60mm Ratchet Stand-up Kit Price: $14.88

Sailing Clothing: Foul Weather Gear | Sailing Footwear | Sailing Life Jackets & PFDs | Sailing Shorts and Pants | Sailing Shirts and Rash Guards | Dry Suits and Wet Suits

Sailing Equipment: Sailboat Blocks | Sailboat Cam Cleats | Shackles and Fids | Sailboat Tillers & Wheels | Mainsheet and Traveler Parts | Sailboat Winches and Winch Handles

Sailing Gear: Sailing Watches and Timers | Sailboat Maintenance | Boat Speed, Wind & Weather Instruments | Sailing Gear Bags & Backpacks | Tools, Knives & Tension Gauges | Sailboat Compasses

Sailing Line: Hi-Tech Single Braids | Dyneema Cored Lines | Dyneema Single Braids | Vectran Cored Lines | Polyester Cored Lines | Small Diameter Lines
Annapolis Performance Sailing Limited Copyright© 2014. All Rights Reserved.

Annapolis Performance Sailing
104 Severn Avenue
Annapolis, MD 21403
(410) 268-3676