M4 — MasterDrive QD Bushing, "M Series", 4 in Bore, 9 in Flng OD, Ductile Iron Material

This part is quoted on request, so no price is listed for it here. Send the quote form on this page with your quantity, or email orderdesk@kkmsolutions.com, and our order desk will reply with pricing and availability within 1 business day.

M4 is made by MasterDrive and is listed in our Bushings & Hubs (QD, Taper) category. KKM Solutions is an independent distributor, not an authorized MasterDrive dealer: we source the exact MasterDrive part number M4, and the quote confirms condition and lead time before you order.

Parts we supply are new and genuine unless the quote expressly states otherwise. Where a part is new-old-stock, from excess inventory, refurbished or open-box, the quote says so before you approve it.

Parts we supply are warranted against manufacturing defects for 1 year from the date of delivery; where the manufacturer's own warranty is longer, the manufacturer's warranty applies. The warranty covers repair, replacement, or credit of the defective part and does not cover normal wear items, misapplication, improper installation, or consequential damages. Contact us within 30 days of delivery before returning anything — all returns need a return authorization from the order desk.

No published lifecycle status is on file for M4. MasterDrive lists whether a catalog number is current, superseded or end-of-life on its own product page, and our order desk confirms the status with the manufacturer at quote time, before you commit. Send the part number through the quote form on this page.

Key specifications include Bore Diameter: 4 in; Bore Type: Finished Bore with Keyway and 1 Set Screw; Bushing Size: M; Bushing Type: QD Type. The full specification table on this page lists every published attribute for this part.

Per the published specification for M4: Length Through Bore: 6.75 in. Confirm against the full specification table on this page, or ask our order desk to verify it with the manufacturer at quote time.

Per the published specification for M4: Material: Ductile Iron. Confirm against the full specification table on this page, or ask our order desk to verify it with the manufacturer at quote time.

Lead time for M4 is quoted per order and confirmed on your quote, which our order desk sends within 1 business day. For a line-down emergency, call the 24/7 order desk at (825) 454-5367.