Masterline® Products

Exclusively manufactured and distributed by
Freer Tool & Supply
We are proud to announce that Freer Tool & Supply has officially acquired Masterline® Design & Manufacturing. With this acquisition, Freer Tool has assumed full operational responsibility and is honored to continue Masterline®’s legacy of precision, innovation, and superior quality. This exciting expansion strengthens our ability to serve both longstanding and new customers with an even broader range of capabilities, all backed by our unwavering commitment to excellence.
Precision Manufacturing Solutions — Custom and Standard
At Freer Tool, we proudly manufacture our full product line in-house and can produce virtually any part to meet your specifications or blueprint requirements. Whether you need industry-standard components or custom-engineered solutions, we are ready to deliver.
For our existing Masterline® customers: Rest assured that your trusted manufacturing partner's legacy of precision and quality craftsmanship will continue under the Freer Tool & Supply banner.
For our Freer Tool customers: This expansion brings you access to additional specialized manufacturing capabilities, further strengthening our ability to serve your industrial needs.
Already have a part number or need assistant?
Simply give us a call at 586-463-3200 or email our specialist at sales@freertool.com we'll quickly retrieve the information you need and assist you every step of the way.
All of our products, blueprints, and part details are available in both standard and metric units. Additionally, we offer welding and sub-assembly services to support your complete project needs.
We are excited for the opportunities ahead and look forward to continuing to deliver the craftsmanship, service, and reliability you expect now with expanded capabilities.
Thank you for trusting Freer Tool & Supply Masterline®
- Head / Headless Shaft Assemblies
- Stub Shafts
- Shoulder Bolts
- Threaded Studs
- Leveling Screw Assemblies
- Tubular Spacers
- Jig Feet
- Stop Buttons
- Stop Blocks
- Locating / Drive Keys
- Fitting / Grind Spacers
- Tap Pads
Browse the catalog below
- II1 - Shaft Assembly
- II2 - Metric Shaft Assembly
- II3 - Shaft Assembly with Lube Hole
- II4 - Metric Shaft Assembly with Lube Hole
- II5 - Heavy Duty Shaft Assembly
- II6 - Metric Heavy Duty Shaft Assembly
- II7 - Heavy Duty Shaft Assembly with Lube Hole
- II8 - Metric Heavy Duty Shaft Assembly with Lube Hole
- II9 - Extra Heavy Duty Shaft Assembly
- II10 - Metric Extra Heavy Duty Shaft Assembly
- II11 - Extra Heavy Duty Shaft Assembly with Lube Hole
- II12 - Metric Extra Heavy Duty Shaft Assembly with Lube Hole
- II13 - Double Retainer Shaft Assembly
- II14 - Metric Double Retainer Shaft Assembly
- II15 - Double Retainer Shaft Assembly with Lube Hole
- II16 - Metric Double Retainer Shaft Assembly with Lube Hole
- II17 - Heavy Duty Doube Retainer Shaft Assembly
- II18 - Metric Heavy Duty Doube Retainer Shaft Assembly
- II19 - Heavy Duty Doube Retainer Shaft Assembly with Lube Hole
- II20 - Metric Heavy Duty Doube Retainer Shaft Assembly with Lube Hole
- II21 - Extra Heavy Duty Doube Retainer Shaft Assembly
- II22 - Metric Extra Heavy Duty Doube Retainer Shaft Assembly
- II23 - Extra Heavy Duty Doube Retainer Shaft Assembly with Lube Hole
- II24 - Metric Extra Heavy Duty Doube Retainer Shaft Assembly with Lube Hole
- II25 - Special Tolerance Shaft Assembly (for PTFE Bearings)
- II26 - Metric Special Tolerance Shaft Assembly (for PTFE Bearings)
- II27 - Special Tolerance Double Retainer Shaft Assembly (for PTFE Bearings)
- II28 - Metric Special Tolerance Double Retainer Shaft Assembly (for PTFE Bearings)
- II29 - Key Pin Assembly
- II30 - Metric Key Pin Assembly
- II31 - Set Screw Shaft
- II32 - Metric Set Screw Shaft
- II33 - Set Screw Shaft with Lube Hole
- II34 - Metric Set Screw Shaft with Lube Hole
- II35 - Double-Flat Set Screw Shaft
- II36 - Metric Double-Flat Set Screw Shaft
- II37 - Double-Flat Set Screw Shaft with Lube Hole
- II38 - Metric Double-Flat Set Screw Shaft with Lube Hole
- II39 - Headlesss Cotter Pin Shaft
- II40 - Metric Headlesss Cotter Pin Shaft
- II41 - Double Snap Ring Shaft Assembly
- II42 - Metric Double Snap Ring Shaft Assembly
- II43 - Double Snap Ring Shaft Assembly with Lube Hole
- II44 - Metric Double Snap Ring Shaft Assembly with Lube Hole
- II45 - Custom Products
- III1 - Head Type Shaft Assembly with Retainer
- III2 - Metric Head Type Shaft Assembly with Retainer
- III3 - Head Type Shaft Assembly with Retainer with Lube Hole
- III4 - Metric Head Type Shaft Assembly with with Lube Hole
- III5 - Head Type Screw Flat Shaft
- III6 - Metric Head Type Screw Flat Shaft
- III7 - Head Type Screw Flat Shaft with Lube Hole
- III8 - Metric Head Type Screw Flat Shaft with Lube Hole
- III9 - Head Type Whistlenotch Shaft
- III10 - Metric Head Type Whistlenotch Shaft
- III11 - Head Type Whistlenotch Shaft with Lube Hole
- III12 - Metric Head Type Whistlenotch Shaft with Lube Hole
- III13 - Head Type Cotter Pin Shaft
- III14 - Metric Head Type Cotter Pin Shaft
- III15 - Head Type Cotter Pin Shaft with Lube Hole
- III16 - Metric Head Type Cotter Pin Shaft with Lube Hole
- III17 - Head Type Knurled Cotter Pin Shaft
- III18 - Metric Head Type Knurled Cotter Pin Shaft
- III19 - Head Type Knurled Cotter Pin Shaft with Lube Hole
- III20 - Metric Head Type Knurled Cotter Pin Shaft with Lube Hole
- III21 - Head Type Snap Ring Shaft
- III22 - Metric Head Type Snap Ring Shaft
- III23 - Head Type Snap Ring Shaft with Lube Hole
- III24 - Metric Head Type Snap Ring Shaft with Lube Hole
- III25 - Head Type Knurled Snap Ring Shaft
- III26 - Metric Head Type Knurled Snap Ring Shaft
- III27 - Head Type Knurled Snap Ring Shaft with Lube Hole
- III28 - Metric Head Type Knurled Snap Ring Shaft with Lube Hole
- III29 - Pivot Pin
- III30 - Metric Pivot Pin
- III31 - Tapped Pivot Pin
- III32 - Metric Tapped Pivot Pin
- III33 - Head Type Tapped Pivot Pin with Lube Hole
- III34 - Metric Type Tapped Pivot Pin with Lube Hole
- III35 - Custom Products
- IV1 - Round Head Shoulder Screw
- IV2 - Metric Round Head Shoulder Screw
- IV3 - Hex Head Shoulder Screw
- IV4 - Metric Hex Head Shoulder Screw
- IV5 - Hex Head Shoulder Screw with Lube Hole
- IV6 - Metric Hex Head Shoulder Screw with Lube Hole
- IV7 - Metric Hex Head Shoulder Screw with Lube Hole
- IV8 - Metric Hex Head Double Body Shoulder Screw
- IV9 - Hex Head Double Body Shoulder Screw with Lube Hole
- IV10 - Metric Hex Head Double Body Shoulder Screw w/Lube Hole
- VI1 - Threaded Stud
- VI2 - Metric Threaded Stud
- VI3 - Threaded Rod
- VI4 - Metric Threaded Rod
- VI5 - Keys
- VI6 - Metric Keys
- VI7 - Keys (Over Size)
- VI8 - Metric Keys (Over Size)
- VI9 - Hardened & Ground Keys
- VI10 - Metric Hardened & Ground Keys
- VI11 - D Washers
- VI12 - Hardened D Washers
- VI13 - Precison Weld Washers
- VI14 - Hardened Precision Weld Washers
- VI15 - C Washers
- VI16 - Set Screw Collars
- VI17 - Threaded Set Screw Collars
- VI18 - Fractions-Decimals-Millimeters
- VI19 - Press Fit Rest Button
- VI20 - Metric Press Fit Rest Button
- VI21 - Press Fit Rest Button with Spherical Radius
- VI22 - Metric Press Fit Rest Button with Spherical Radius
- VI23 - Hex Screw Rest Button
- VI24 - Metric Hex Screw Rest Button
- VI25 - Hex Screw Rest Button with Spherical Radius
- VI26 - Metric Hex Screw Rest Button with Spherical Radius
- VI27 - Non-Slip Hex Screw Rest Button
- VI28 - Metric Non-Slip Hex Screw Rest Button
- VI29 - Jig Feet
- VI30 - Metric Jig Feet
- VI31 - Stop Button
- VI32 - Metric Stop Button
- VI33 - Stop Button (Precision Ground)
- VI34 - Metric Stop Button (Precision Ground)
- VI35 - Stop Button
- VI36 - Metric Stop Button
- VI37 - Stop Button (Precision Ground)
- VI38 - Metric Stop Button (Precision Ground)
- VI39 - Stop Blocks (Flat)
- VI40 - Stop Blocks (Crowned)
- VI41 - Stop Blocks (MBL-A)
- VI42 - Stop Blocks (MBL-C)
- VI43 - Stop Blocks (MBL-D)
- VI44 - Stop Blocks (MBL-E)
- VI45 - Stop Blocks (MBL-F)
- VI46 - Stop Blocks (MBL-G)
- VI47 - Stop Blocks (MBL-H)
- VI48 - Stop Blocks (MBL-L)
- VI49 - Stop Blocks (MBL-W)
- VI50 - Stop Blocks (MBL-X)
- VI51 - Stop Blocks
- VI52 - Metric Rest Pads
- VI53 - Positioning Block
- VI54 - Clamp
- VI55 - Adjusting Blocks
- VI56 - Precision Adjusting Blocks
- VI57 - Leveling Screw
- VI58 - Leveling Screw Assembly
- VI59 - Turnbuckles
- VI60 - Weld Gun Adjuster
- VI61 - T Nuts
- VI62 - Metric T Nuts
- VII1 - Spacers & Tap Pads
- VII2 - One-Bolt Spacers
- VII3 - One-Bolt Slotterd Spacers
- VII4 - One-Bolt Tap Pad
- VII5 - Two-Bolt Spacers
- VII6 - Two-Bolt Slotted Spacers
- VII7 - Two-Bolt Tap Pad
- VII8 - Three-Bolt Spacers
- VII9 - Three-Bolt Slotted Spacers
- VII10 - Three-Bolt Tap Pad
- VII11 - Four-Bolt Spacers
- VII12 - Four-Bolt Slotted Spacers
- VII13 - Four-Bolt Spacers
- VII14 - Four-Bolt Tap Pad
- VII15 - Tubluar Spacer
- VII16 - Metric Tubluar Spacer
- VII17 - Retainers (Inch)
- VII18 - Metric Retainers
- VII19 - Double Hole Retainers (Inch)
- VII20 - Metric Double Hole Retainers
- VII21 - Custom Products
- VIII1 - Cylinder Accessory Mating Chart
- VIII2 - Knuckle
- VIII3 - Clevis Bracket
- VIII4 - Eye Bracket
- VIII5 - Self-Aligning Coupler
- VIII6 - Metric Self-Aligning Coupler
- VIII7 - Double Snap Ring Shaft Assembly
- VIII9 - Cylinder Clevis
- VIII10 - Metric Cylinder Clevis
- VIII11 - Trunnion Block
- VIII12 - Metric Trunnion Block
- VIII13 - Male Thread Mount Adapters
- VIII14 - Screw Mount Adapters & Plate
- VIII15 - Mini Adapters & Mini Couplers
- VIII16 - Couplers (Male & Female)
- VIII17 - Metric Couplers (Female)
- VIII18 - Metric Couplers (Male)
- VIII19 - Round & Tapered Switch Dogs
- VIII20 - Metric Round & Tapered Switch Dogs