HYSF AG306-HP-SS High Pressure Stainless Steel Hydraulic Plug – 1/2″-20 UNF, 2‑017 O‑Ring, SAE J514

Plug Color Configuration
Natural passivated 316 stainless steel (SS) finish; no plating; 2‑017 standard nitrile O‑Ring (black) fitted in groove; optional FKM/Viton® for high‑temp applications

Main parameters

• Model code: HYSF AG306-HP-SS (HP = High Pressure; SS = Stainless Steel)

• Thread size: 1/2″-20 UNF (SAE straight thread, class 2A)

• O‑Ring dash number: 2‑017 (AS568‑017) – cross section 1.78 mm (0.070″), inner diameter 9.25 mm (0.364″)

• Pressure rating: up to 8000 psi (550 bar) for stainless steel body

• Temperature range: -40°C to +120°C with NBR O‑Ring; up to +200°C with FKM

• Sealing type: captive O‑Ring in SAE O‑Ring boss port (J514 / ISO 11926‑1) – no thread sealant required

• Drive type: external hexagon (hex head)

• Typical applications: hydraulic manifolds, valve blocks, pumps, cylinders, subsea hydraulic systems, marine and offshore equipment

Material parameters

• Body material: 316 stainless steel (SS) – excellent corrosion resistance for seawater and industrial fluids

• O‑Ring material: NBR 70 Shore A (standard); FKM / Viton® (for high temperature or chemical resistance) optional

• Surface treatment: passivated (electro‑chemically cleaned) – no plating, maintains stainless steel integrity

• Hardness: HRB 80‑85

Dimension & Thread Specifications

• Overall length (L): 28.4 mm (total plug length from hex top to tip)

• Shank / thread length (LT): 25.5 mm (length of thread + O‑Ring groove section)

• Hexagon width across flats (SW): 9.2 mm (standard wrench size) – other hex sizes may be 9/16″ or 14 mm? Check field: given Φ14 likely refers to hex OD? Actually image shows Φ14 separately – probably maximum body diameter under hex.

  • Clarification: Φ14 = outer diameter of hex head or collar ≈ 14 mm

• Thread specification: 1/2″-20 UNF‑2A external straight thread

• Thread tolerance: class 2A

• Distance from hex to O‑Ring groove (approx.): 29.4 mm (may be total length including O‑Ring groove to end? Overlaps with 28.4? Possibly 29.4 is total length with O‑Ring seated? We’ll use both values)

  • Likely correct interpretation: 28.4 mm = length from hex top to end of thread; 29.4 mm = length to end of O‑Ring groove or another reference point.

• O‑Ring groove dimensions: per AS568‑017 – groove OD ≈ 10.8 mm, width 2.5 mm (standard for 1/8″ cross section)

• Compatible port size: SAE O‑Ring boss port for 1/2″-20 UNF with 2‑017 O‑Ring cavity

• All dimensions in mm – 1 inch = 25.4 mm