APS - Dwyer Dinghy Mast & Boom Parts
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Dwyer/Damco Spar Information

Dwyer/Damco Spar Information

Dwyer spars have and do supply many builders with spars and parts. We stock all of their most popular replacement parts. Note that DM-20 and DM-3 sections are used as mast only and DM-1 and DM-2 as both masts and booms. We have provided the information above to help you identify your Dwyer mast type.




DM-20 Mast Ends Fittings

DM-20 Mast Ends Fittings From Dwyer, the mast head and mast step are designed to work with the DM-20 Mast. The masthead is made up of two sheaves, two aluminum pins and the mast casting. It uses two pop rivets.

DH120 DM-20 Masthead w/Sheaves Price: $28.00 DH2120 DM-20 Mast Heel Plug/Step Price: $14.15



DM-1 Mast Ends Fittings

DM-1 Mast Ends Fittings Designed to be compatible with the DM-1 Mast, the end fittings are a mast head with nylon sheaves, or two options for mast steps. The Mast steps are available with or without a Tenon. Two pop rivets are needed for the mast head and the mast step with Tenon.

DH101 DM-1 Masthead Casting Price: $28.00 DH211 DM-1 Step w/Tenon Price: $13.65
DH212 DM-1 Mast Heel Plug/Step Price: $13.25



DM-2 Mast End Fittings

DM-2 Mast End Fittings Designed to be compatible with the DM-2 Mast, the end fittings are a mast head with nylon sheaves, or three options for mast steps. The Mast steps are available with or without a Tenon or with a hinged step. Two pop rivets are needed for the mast head, mast step with Tenon and the hinged step.

DH102 DM-2 Masthead w/Sheaves Price: $28.60 DH213 DM-2 Step w/Tenon Price: $15.35
DH214 DM-2 Mast Heel Plug/Step Price: $13.90 DH214H DM-2 Hinged Step w/Heel Plug Price: $67.00



DM-3 Mast End Fittings

DM-3 Mast End Fittings Designed to be compatible with the DM-3 Mast, the end fittings are a mast head with nylon sheaves, or three options for mast steps. The Mast steps are available with or without a Tenon or with a hinged step. Two pop rivets are needed for the mast head, mast step with Tenon and the hinged step.

DH103 Masthead Casting DM-3 Price: $33.10 DH215 DM-3 Step w/Tenon Price: $14.40
DH216 DM-3 Mast Heel Plug/Step Price: $13.60 DH216H DM-3 Hinged Mast Step Price: $67.50


DM-2 & DM-3 Mast Hardware

DM-2 & DM-3 Mast Hardware

Part Number Description
DH713 Radiused Tang Needs 3 SSP2 Pop Rivets
DH714 Radiused Tang Needs 4 SSP2 Pop Rivets
DH70 Tang Needs 4 SSP2 Pop Rivets
DH601 Mast Eye Needs 4 SSP2 Pop Rivets
DH312 Bail Needs 4 SSP2 Pop Rivets
DH856A Hound Assembly Needs BN1 Bolt with Nut and 2 SSP2 Pop Rivets


DH312 Boom Bail - 4 Mounting Holes Price: $5.85 DH601 Spin Pole Mast Ring Price: $24.00
DH70 Tang - Fork with Four Hole Attach Price: $13.90 DH713 Tang - Three Hole Attachment Price: $5.80
DH714 Tang - Four Hole Attachment Price: $6.25 DH856 Mast Hound - No Clevis Pin Price: $17.90
DH856A Mast Hound Assy - Complete Price: $38.55


Dwyer Spreaders

Dwyer Spreaders

Part Number Description Additional Information
DH2510 Spreader Fits with the 256 Bracket, it has diameter of 1/2" and 24" in length
DH256 Spreader Bracket 1/4" Pin, Needs 2 SSP2 Pop Rivets
DH2520 Spreader Fits with the 252 Bracket, it is 5/8" OD and 24" Length
DH252 Spreader Bracket Needs 3 SSP2 Pop Rivets
DHDS1 Spreader, Standard Airfoil (Pair) Fits with with 2521 Bracket, 1" in width and 20" long
DH2521 Spreader Bracket Wrap Around Spreader Bracket, Uses 6 SSP2 Pop Rivets


DH2510 1/2 Round Spreader 24 (1) Price: $15.90 DH252 Spreader Bracket One Side SS Price: $15.85
DH2520 5/8 Round Spreader 24 w/Sq Price: $20.10 DH2521 Dwyer Airfoil Spreader Bracket Price: $38.00
DH256 Spreader Lug Cast Aluminum Price: $11.75 DHDS1 Spreaders Std Airfoil (pr) Price: $51.10


DM-1 Boom End Fittings

DM-1 Boom End Fittings

Part Number Description
DH6530 Outhaul Cap Needs 2 SSP4 Pop Rivets
DH353C Gooseneck Casting Needs 2 SSP4 Pop Rivets
DH653 Outhaul Cap with Tang Needs 2 SSP4 Pop Rivets
DH3531S Sliding Gooseneck Needs 2 SSP4 Pop Rivets
DH3531L Sliding Gooseneck Needs 2 SSP4 Pop Rivets
DH353F Fixed Gooseneck Needs 2 SSP4 Pop Rivets and 6 SSP2 Rivets


DH3531L DM-1 Boom End w/Gooseneck-DM2+ Price: $62.75 DH3531S DM-1 Boom End w/Gooseneck-DM1 Price: $62.75
DH353C DM-1 Boom Gooseneck End Price: $20.15 DH353F DM-1 Boom End w/Gooseneck - Fixed Price: $60.20
DH653 DM-1 Outhaul End w/Tang Price: $18.85 DH6530 DM-1 Outhaul Boom End Price: $11.95


DM-2 Boom End Fittings

DM-2 Boom End Fittings

Part Number Description
DH6540 Outhaul Cap Needs 2 SSP4 Pop Rivets
DH354C Gooseneck Casting Needs 2 SSP4 Pop Rivets
DH654 Outhaul Cap with Tang Needs 2 SSP4 Pop Rivets
DH3541L Sliding Gooseneck Needs 2 SSP4 Pop Rivets
DH354F Fixed Gooseneck Needs 2 SSP4 and 6 SSP2 Pop Rivets
DH354FL Fixed Gooseneck Needs 2 SSP4 and 6 SSP2 Pop Rivets


DH3541L DM-2 Boom End w/Slide Gooseneck Price: $63.35 DH354C DM-2 Gooseneck Boom End Price: $19.60
DH354F DM-3 Boom End w/Fixed Gooseneck Price: $63.35 DH654 DM-2 Outhaul Boom End w/Tang Price: $18.95
DH6540 DM-2 Outhaul Boom End Price: $12.20


Dwyer Goosenecks

Dwyer Goosenecks

Part Number Description Fits Mast Size/Groove Size Additional Information
DH410 Fixed Gooseneck DM-500 6 fixing holes on mast mounting plate
DH414 Fixed Gooseneck, Roller Reefing, Removable Spring-Loaded Pin 2" to 2-1/2", Round 4 fixing holes on mast mounting plate
DH415 Fixed Gooseneck, Roller Reefing, Removable Spring-Loaded Pin DM-3, DM-4, DM-5 6 fixing holes on mast mounting plate
DH415L Fixed Gooseneck, Roller Reefing DM-375
DH418 Roller Reefing Gooseneck Slide, Removable Spring-Loaded Pin 3/8" Deep Groove
DH4151 Roller Reefing Gooseneck Slide 1/2" Deep Groove


DH410 Fixed Gooseneck Price: $71.00 DH414 Fixed Gooseneck Price: $38.10
DH415 Gooseneck Fixed DM 3, 4 & 5 Price: $38.10 DH4151 Sliding Gooseneck -1/2 groove Price: $41.20
DH418 Gooseneck Sliding 3/8 Groove Price: $41.20

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