1 2 / 8 / 2 1 , 2 : 4 1 A M H o l e P l u g s ( H P S e r i e s ) - H a m m o n d M f g . Quality Products. Service Excellence. Hole Plugs HP Series Features Designed to seal unused push button holes, conduit openings and knock out holes against dust, oil and water. Standard Pushbutton size is 30.5mm Mini Pushbutton size is 22.5mm Steel Hole Plug Available in 12 sizes. Finished in 2 color options - ANSI 61 gray or RAL7035 Light Gray Oil resistant gasket. Secured with an 10-24 x 0.55 threaded stud and plated wing nut. Stainless Steel Hole Plugs Available in 8 sizes. Finished in brushed natural 304 stainless steel finish. Oil resistant gasket. Secured with an 10-24 x 0.55 threaded stud and plated wing nut. Steel ANSI 61 RAL7035 Lt Gray Gray Max Hole Plug Part No. Part No. Description Diameter Diameter 22mm Mini HP22 HP22LG 0.88 1.22 Pushbutton HP50 HP50LG .5 Conduit 0.88 1.38 HP75 HP75LG .75 Conduit 1.06 1.56 HPB HPBLG Std. Pushbutton 1.25 1.75 HP100 HP100LG 1 Conduit 1.38 1.88 HP125 HP125LG 1.25 Conduit 1.69 2.19 HP150 HP150LG 1.5 Conduit 2.00 2.50 HP200 HP200LG 2 Conduit 2.50 3.00 HP250 HP250LG 2.5 Conduit 3.00 3.50 HP300 HP300LG 3 Conduit 3.62 4.12 HP350 HP350LG 3.5 Conduit 4.12 4.62 HP400 HP400LG 4 Conduit 4.62 5.12 Stainless Steel Part No. Description Max Hole Diameter Plug Diameter HP22SS 22mm Pushbutton 0.88 1.22 HP50SS .5 Conduit 0.88 1.38 HP75SS .75 Conduit 1.06 1.56 HPBSS Std. Pushbutton 1.25 1.75 HP100SS 1 Conduit 1.38 1.88 HP125SS 1.25 Conduit 1.69 2.19 HP150SS 1.5 Conduit 2.00 2.50 HP200SS 2 Conduit 2.50 3.00 h t t p s : / / w w w . h a m m f g . c o m / e l e c t r i c a l / p r o d u c t s / a c c e s s o r i e s / h p 1 / 21 2 / 8 / 2 1 , 2 : 4 1 A M H o l e P l u g s ( H P S e r i e s ) - H a m m o n d M f g . Data subject to change without notice 2021. Hammond Manufacturing Ltd. All rights reserved. h t t p s : / / w w w . h a m m f g . c o m / e l e c t r i c a l / p r o d u c t s / a c c e s s o r i e s / h p 2 / 2