The Enerpac EAJ-QFN-Series, EAJ tensioner quick fastening nuts speed up the run-down step in hydraulic bolt tensioning, letting an operator close the gap between nut and joint face by hand before the tensioner pulls the stud. Enerpac, founded in 1910 and headquartered in Milwaukee, Wisconsin, builds high-pressure bolting and tensioning equipment rated to 10,000 PSI, and these quick fastening nuts are the accessory layer that pairs with that tensioning hardware. If you are matching a discontinued nut to a current bolt size or working out which EAJ thread fits your stud, request a cross-reference quote and we will confirm the equivalent.
Quick fastening nuts are sized to the stud diameter and thread of the tensioning system they serve, so selection starts with the joint and the tensioner you already run. The full tensioning picture spans more than the nuts: Enerpac builds the hydraulic tools and dedicated Enerpac hydraulic tools that drive the load, the hydraulic pumps that supply pressure, and the hydraulic cylinders behind related pressing and lifting work. For lifting and positioning around the joint, see Enerpac hydraulic jacks, and route pressure with the matching hydraulic hoses. To confirm fit, match the nut thread and diameter to the stud, then verify the tensioner head clears the nut profile.
Tensioning accessories carry long service lives, so the part number stamped on an existing nut may no longer match a current Enerpac catalog item. We cross-reference discontinued EAJ-QFN part numbers against current-production equivalents and identify replacement and equivalent parts when an original line has changed. Across the broader Enerpac range we also map superseded items to their current alternatives, such as the discontinued XC-series cordless pumps to the current SC-series, and the RCH and RRH hollow plunger cylinders that serve modern tensioning and pulling work. Send us the nut size, stud thread, and the tensioner model it works with, and request a cross-reference quote for the right equivalent.
38 Enerpac EAJ-QFN-Series, EAJ Tensioner Quick Fastening Nuts models · 38 quoted on request · 32 in stock
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Yes. Every Enerpac product we list is factory-new and genuine — not aftermarket or remanufactured. Item SKUs match the manufacturer part numbers, so you can verify any model directly against Enerpac documentation.
Click Request a Quote on the product (or call (800) 823-4937). We confirm current pricing and availability with the manufacturer and typically respond within one business day.
Yes — Northern Hydraulics has supplied hydraulic equipment since 1963. Call (800) 823-4937 with your application details, or send a quote request with the model you are replacing and we will cross-reference it to the right Enerpac part.
Yes. For multi-unit or recurring orders, use the Request a Quote button — volume pricing on Enerpac equipment is quoted case by case, usually within one business day.