Bonnethead (STANDALONE)

BONNETHEAD Compact Performance Variant Description The Bonnethead is a compact version of the Hammerhead platform that preserves full plunger geometry and output in a shorter frame. Using a 3"+3" paired spacer and a 4" spacer, the overall length is reduced while maintaining rigidity and alignment. The design keeps the same power profile and reliability as the full-size platform in a lighter, more maneuverable format. Unique Turn Around and Slide components define its compact operation and layout. Hardware Kit (Bonnethead / Scoophead / Scalloped) Part McMaster # Qty required 4-40 3/8" FH (steel) 90273A108 24 4-40 1" FH (steel) 90273A115 12 10-32 3/4" FH (steel) 90273A831 6 10-32 1.25" BH (steel) 91440A516 6 10-32 1.75" BH 90279A837 6 10-32 1/8" thick nut 90480A195 12 10-32 Flange nut 90389A113 3 10-32 threaded rod (3ft) 98838A011 2 x 1" + 1 x 1.5" + 1 x 3" + 2 x 5" + 3 x 8" + 2 x 12" Catch Washer 7421K12 1 1.5" OD washer 92141A035 1 4" Spacer (steel) 93265A042 1 3" Spacer (steel) 93265A034 4 1" Spacer 93330A476 3 Small Spring (3/4") (36" *5) 9662K16 6 K26 (11") (5.5" piece) 9637K26 1 K25 (11") (5.5" piece) 9637K25 1 1.375" ID Plunger Tube (3ft) 53945K21 1 x 5" Alum tube 0.509" ID (3ft) 9390N15 1 x 7" + 1 x 14" Press Insert for plastic 92395A112 6 1.375" OD O-RING 9452K87 6 0.5" OD O-RING FAT 9452K18 6 0.5" OD O-RING 9452K21 6 Key Features Compact frame with identical plunger geometry and power output Spacer layout uses paired 3" + 3" and 4" segments for reduced length Requires spacer matching to achieve a consistent 6" smooth segment Includes Turn Around and Slide components unique to this variant Suitable for builders wanting a shorter platform without performance loss Spacer Note Dual 3" spacers must be tolerance matched to form a true 6" smooth segment. Buying 6" spacers is an option but at higher cost. Expect some surplus if pairing your own.