Spanner Tools
Our Spanner Tools are used when the nut or gland doesn’t have flats for a socket.
Fixed Pin Spanner Plate | MSD-FPS
The heavy-duty fixed pin spanner tool comes in three standard sizes 2”, 3”, & 3-1/2” (50.8 mm, 76.2 mm, 88.9 mm). They have an 8” X 8” (203.2 mm X 203.2 mm) outside dimension to fit our “Nut Buster”. A 3/16” (4.8 mm) thick leather liner protects the shaft from damage upon installation and removal.
The Heavy-Duty Fixed Pin Spanner plates are designed to remove heads and glands. Plate is supplied with no holes, customer to determine and drill the correct center line distance and pin diameter for application.
Three- and Four-Point Spanner Tool | MSD-FPST
The tool is constructed with a 6-5/8” (168.3 mm) diameter thru hole. This tool is supplied with a set of these spanner pins 3/8”, 7/16”, 1/2”, 5/8”, 3/4”. Metric pins are available upon request.
Light Duty Spanner Set | MSD-LSS
This light duty spanner plate can be used on shafts up to 4-1/4” (108 mm) and uses our standard pin spanner and hook spanner sets.
The MSD-Adjustable spanners are designed to hook on to the slots or grooves located on the outside of some cylinder heads. The arms can be made to fit nearly any configuration of slot or groove. A large 4-1/4” (108 mm) hole through the center allows a shaft and clevis to extend through the tool while working on the cylinder head. Our standard pin spanner comes with three sets of pin arms with 3/8″, 7/16”, 1/2” and 5/8″ hardened pins. Metric pins are available upon request.
Heavy Duty Spanner Tool | MSD-HDSS
This heavy duty spanner tool is used as a face and side pin spanner. This tool gets welded to a brace tool at the same center height of the nut buster. The MSD-HDSS maximum diameter is about 16″ (406 mm). These pins are included 5/16″, 3/8″, 7/16″, 1/2″, 5/8″ & 3/4″
Large Diameter Spanner | MSD-LDAS
Large Diameter Spanner | MSD-LDAS
This fixture is used for pin spanner application on large diameter heads of pistons. The fixture mounts on our standard MSD-VE vise elevator for overall height adjustment. The cylinder or shaft is then rotated by the MSD-ARC in any of our “Nut Busters.”
The fixture mounts on our standard MSD-VE vise elevator for overall height adjustment (A).
The cylinder or shaft is then rotated by the MSD-ARC rotation capture in any of our Nut Busters (B).
The main support has three arm mounting positions to cover three diameter ranges. The arm is shown installed in the center position (C).
The pin assembly is made from a 3/4” OD drill bushing with a pressed-in hardened pin. The unit comes with five drive pin sets of 3/8”, 7/16”, 1/2”, 5/8” and 3/4” (D).
The drive pins are easily inserted and held in the ¾ “ID holder.
Large Diameter Four-Point Spanner | MSD-LDFS
Large diameter four-point spanner tool (MSD-LDFS). This tool can be used as a two, three or four point spanner. This spanner is designed to bolt on to your existing adjustable brace tool style base plate (MSD-ABT). Base plate is not provided. Optional base plate and L-Brackets are sold separate. Included with this spanner are 4 sets of each pin assembly 5/16”, 3/8”, 7/16”, 1/2”, 5/8” and 3/4”. Also included, are four 1/2” side groove caps for slotted grooves.
This tool is designed to be at the same center height as the nut buster. Please specify the center height when ordering. (13-1/2” or 16-1/2”) and what size nut buster you have.

