Used as terminals and overloads in…

  • Semi-Hermetic Air Conditioning Compressors
  • Semi-Hermetic Refrigeration Compressors
  • Explosion Proof Electric Motors
  • Electromagnets
  • Vacuum Furnaces
  • Electric Steam Generators
  • Autoclaves
  • Oil & Gas Filled Transformers and Switching Equipment
  • Centrifugal and Submersible Pumps


  • Provide a leakproof electrical connection through the walls of a variety of pressure vessels.
  • Are compatible with currently used refrigerants and phenolic oils.
  • Have a superior leakage resistance, tested with a helium leak tester, and a standard acceptance leak rate of <1×10-6 cc/sec (He).
  • Typical operating pressures are from 0 PSIA to 500 PSIG.
  • Have a greater temperature capability than similar products… up to 250 deg. F.
  • Are built with copper conductors (brass for BG220-1H and BG350B) and brass nuts for maximum electrical current carrying ability and lowest connection losses.


Auburn Part NumberEquipment Manufacturer P/NBG Part Number
F-200-1, F-200-1H, F-210-1H,
F200-1, F200-1H, F210-1H
Eclipse 14320BG210-1H
F-220-1, F-220-1B,
F220-1, F220-1B
F-230-1H, F230-1HBG230-1H
F-240LL, F-240LLH, F-250LL,
F-250LLH, F240LL, F240LLH, F250LL, F250LLH
F-300, F-310H,
F300, F310H
F-350H, F350H,
F-351, F351
Not ApplicableBG350B
F-610, F610BG610
F630, F630BG630
F-650, F650BG650
F-670-1, F670-1BG670-1
F-68, F-140, F-150,
F-820, F68, F140, F150,
Contact Factory
* BG220-1H overall length is .25″ longer than F-220-1B
BG Model Conductor Current Rating Amps Electric Flashover > Mounting Thread, Hex Overall Length Insertion Length Operating Pressure1, 2 Brass Nut Installation3 Maximum Operating Temp.
BG210-1H 0.25 in (6.35mm) 175 10kV DC 3/8-18 PTF-SAE Short, 13/16″ Hex 4.45 in (113mm) 1.57 in (39.9mm) 500 PSIG (3445Kpa) 40 in-lb (4.5 N-m) 250°F (121°C)
BG220-1H 105 5/8-18 UNF-2A X .360 LG. 13/16″ Hex
BG230-1H 175
BG250LLH 14kV DC 1/2-14 NPT 7/8″ Hex 5.17 in (131.3mm) 1.93 in (49mm)
BG310H .375 in (9.53mm) 275 12 kV DC 3/4-14 NPT 1-1/8″ Hex 5.22 in (132.6mm) 2 in (50.8mm) 10 ft-lb (12.5 N-m)
BG350H 7/8-14 UNF-2A X .475 Lg. 1-1/8″ Hex
BG350B 175
BG610 .625 in (15.88mm) 750 10kV DC 1-11 1/2 NPT 1-3/8″ Hex 5.91 in (150.1mm) 2.12 in (53.8mm) 50 ft-lb (67.8 N-m)
BG630 7.68 in (195.1mm) 2.88 in (73.2mm)
BG670-1 8.17 in (207.5mm) 3.87 in (98.3mm)
BG650 1 5/16 – 12 UN-2A 1-3/8″ Hex 5.91 in (150.1mm) 2.12 in (53.8mm)
1Leak Rate: Test acceptance < 1 X 10-6 cc/sec (He) 2Hydrostatic Pressure test 2500 PSI 3Installation Note: Recommended installation torque for brass nuts should not be exceeded. Electrode threads will be damaged. BG recommends the use of two wrenches when connecting to our feedthroughs. There are two brass nuts on each end that must be tightened against one another.

Catalog Index