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ASME Replacement Swing-bolt / Wing-nut Assemblies
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Betts offers a variety of ASME swing-bolts for the Full Opening Manhole product line. All ASME swing-bolts are a solid one-piece design made from 17-7 stainless steel with 5/8-11 UNC threads. Wing-nuts are 304 stainless steel.

Wing-nut includes a staked-on bearing washer for decreased wear and a retention e-clip is included on top of swing-bolt to keep the wing-nut from accidentally unthreading off of the swing-bolt while opening manhole. Assemblies ending in “002” include swing-bolt pin (4463SL) and 1/8” coil pin (9Q8605). Please note: older style swing-bolts have a larger coil pin hole diameter; therefore, specify the “002” kit to ensure the necessary replacement components are received.

Swing-bolt / wing-nut assemblies will last longer if properly maintained. Keep threads clean and lubricated with anti-seize compound, and never hit wing-nuts with a hammer.  Use proper wing-nut tools 6443SS or 6469SL with a maximum torque of 45 ft-lbs.

The sealed wing-nut option offers a solid top-plate to protect the threads from water or debris and also includes a grease fitting for preventive maintenance.

Part # Description Length Replaces
4481SL002 ASME Swing-bolt 4459SL / Wing-nut Assembly w/ Pin and Coil Pin 3.25″ 4102SF
4184SF
4487SL002 ASME Swing-bolt 4459SL / Sealed Wing-nut Assembly w/ Pin and
Coil Pin
3.25″ 4102SF
4147SF
 4482SL002  ASME Swing-bolt 4480SL / Wing-nut Assembly w/ Pin and Coil Pin  3.81″  n/a
4483SL002 ASME Swing-bolt 4472SL / Wing-nut Assembly w/ Pin and Coil Pin 4.5″ 4119SL
4472SL
  4486SL002   ASME Swing-bolt 4472SL / Hex-nut Assembly w/ Pin and Coil Pin 4.5″ 3615SF
4472SL
4484SL002 ASME Swing-bolt 4473SL / Wing-nut Assembly w/ Pin and Coil Pin 5.13″ 4143SL
4485SL002 ASME Swing-bolt 4473SL / Special Wing-nut Assembly w/ Pin and
Coil Pin (For 8171 Manholes)
5.13″ 4120SL
4263SL