HYSF XSG-6-BCL 3/4″-16 UNF SAE J514 O‑Ring Boss Hydraulic Hex Plug with 2‑213 NBR Seal

Plug Color Configuration
Zinc‑plated silver trivalent clear finish (standard), also available in black zinc, yellow zinc, or plain steel unplated for HYSF XSG series hydraulic plugs

Main parameters

• Thread size: 3/4″-16 UNF male straight thread per SAE J514 / ISO 11926‑1

• O‑Ring dash number: 2‑213 (AS568‑213), compatible with SAE O‑Ring boss port

• Working pressure: up to 5000 psi (345 bar) for hydraulic systems

• Temperature range: -40°C to +120°C with NBR O‑Ring; FKM / Viton® optional for high‑temp applications

• Sealing type: captive O‑Ring recessed in boss, no thread sealant required

• Drive type: external hexagon for standard wrench

• Model code: HYSF XSG‑6‑BCL (straight thread hydraulic plug)

• Typical applications: hydraulic manifolds, valve blocks, pumps, cylinders, and subsea or industrial fluid power systems

Material parameters

• Body material: cold‑forged carbon steel (grade 1215 or 1045) for high strength

• Surface treatment: RoHS‑compliant zinc trivalent passivation, 8‑12 μm thickness, provides 72‑96 hours salt spray protection (ASTM B117)

• O‑Ring material: NBR 70 Shore A (standard), resistant to mineral oils and hydraulic fluids

• Hardness: HRB 75–80 core hardness for reliable thread engagement

• Optional materials: stainless steel SS316, SS304, or brass available upon request for corrosion‑resistant applications

Dimension & Thread Specifications

• Thread specification: 3/4″-16 UNF‑2A external thread, class 2A tolerance

• Overall length (L): 30.5 mm total plug length

• Hexagon width across flats (SW): 15.7 mm (approx. 5/8″) – fits standard SAE hex socket or wrench

• Shank length under head (or total thread + O‑Ring groove length): 39.7 mm

• O‑Ring groove dimensions: AS568‑213 standard – cross section 3.53 mm, inner diameter 23.47 mm

• Thread length engagement: full UNF thread for leak‑free high‑pressure seal

• Compatibly port size: SAE O‑Ring boss port for 3/4″-16 UNF with mating 2‑213 O‑Ring

• Exact replacement for: Parker, Hydac, or Enerpac style SAE plugs; direct cross‑reference to XSG‑6‑BCL