Ø7/8″ rod × 7/8-14 UNF-2A threads each end, pre-dimensioned to NFPA T3.6.7 spec for 5″ bore heavy-duty hydraulic cylinders. Measure your old rod end-to-end and dial the total length in the configurator. Everything else is filled in. NFPA Table 9 dimensions, for cylinders rated to higher operating pressures (industrial 1000–3000+ PSI hydraulic).
5″ Bore Heavy-Duty Cylinder Tie Rod profile (configurator preview)
Dimensions & defaults
Cylinder duty
Heavy-duty hydraulic
NFPA cylinder bore
5″
Tie-rod diameter
7/8″ (0.875″)
Thread (each end)
7/8-14 UNF-2A
Thread length (each end)
3.18″ minimum (NFPA BB, extendable in configurator)
Default total rod length
12.36″ = 3.18″ thread + 6″ unthreaded middle + 3.18″ thread (editable, measure your old rod; max 48″)
OD tolerance
±0.005″ (tighter than NFPA §6.5, which permits ±0.015″ on two-decimal dimensions)
Priced instantly in the configurator: from $168 for this part as loaded. Change the material, tolerances, features, or quantity and the price updates as you go. $50 minimum order.
Material, tolerances, and features (bores, threads, O-ring seal grooves, wrench flats) stay editable in the configurator. The seal-groove widths and depths follow the SAE AS4716 radial-gland and AS6235 face-gland designs reproduced in the Machinery's Handbook O-ring tables, and tie-rod threads follow NFPA T3.6.7. The bore, rod, and thread fits are set from the nominal size, so measure your cylinder and your old part and check them, and the grooves against your seal maker's chart, before ordering. The drawing's title block stamps the source size so any deviation is visible to your buyer and to us.
Machined from 1144 by default. See the 1144 material guide, or change the grade in the configurator.
Frequently Asked Questions
By the part you are replacing. A piston is sized by the cylinder bore, and a plug by its thread. A rod gland or gland nut has two independent fits: the bore the rod slides through, set by your rod diameter, and the thread (or OD) that mounts into the cylinder head, set by the head, which follows the cylinder bore, not the rod. Pick the card that comes closest and the part loads into the configurator with its diameters, seal grooves, thread, and bore dimensioned. Measure your old part and the cylinder, then adjust any dimension; they are all editable and the rod and head fits move independently.
The seal grooves are cut to the SAE AS4716 gland design reproduced in the Machinery's Handbook O-ring tables. We pick the O-ring cross-section to suit the size: the 0.139" section for cylinder bores up to 2-1/2" and rods up to 1-1/2", and the 0.210" section for 3" bores. The groove width and radial depth come straight from those tables. If your seal maker's chart calls for a different groove, set the groove width and depth to it in the configurator; they stay editable.
These rod glands are the screw-in style: an external thread on the gland OD threads into the cylinder head. The gland carries a rod seal and a wiper in the bore, where the rod slides through, plus a static O-ring groove on the OD that seals the gland to the head. If your cylinder uses a bolted flange gland instead, send us the bolt circle and we build that version.
Yes. The two fits are independent: the bore is set by your actual rod, and the mounting thread (or OD) is set by your cylinder head, which follows the bore. They do not have to match the standard rod-to-bore pairing, a heavy-service cylinder often runs a larger rod than the standard for its bore, and a repaired rod may be a hair under. Measure your rod and the head thread the gland screws into (or send the worn gland or nut), set both in the configurator, and we build to your numbers. The gland nut works the same way: its clearance bore follows the rod, its thread follows the head.
The cards default to 1018 cold-finished steel, the rebuild-part workhorse. Switch to 12L14 free-machining steel, 1045 for higher duty, or 303 / 304 stainless for washdown service in the configurator; 6061 aluminum is a good choice for light pneumatic pistons. If your original gland was a bearing bronze, tell us the cylinder and we will quote the right grade. Material certs (MTRs) are available on request.
No — we do not offer chrome plating, and the rod cards do not pretend otherwise. They ship unplated, machined from 1045 cold-finished at a 16 Ra running finish, which serves pneumatic cylinders and light hydraulic duty well. A finish that fine is reviewed and quoted rather than priced instantly. For hard-chrome hydraulic service, the standard shop practice works here too: supply induction-hardened chrome-plated (IHCP) rod stock — mark the material as customer-supplied in the configurator — and we machine the piston-end stud, the rod-end thread, and the wrench flats on your bar. 303, 304, or 316 stainless are unplated alternatives for corrosive service.
Yes, that is what these are for. Set the bore, rod, thread, and seal grooves to your measured cylinder in the configurator; every dimension stays editable, so measure the old part and check the critical fits before ordering.