NLB软管枪和硬管枪连接头设计原理是：最小的外径提供最大的流量。它们有两种基本的型号。母螺纹连接头，连接公螺纹水枪；公螺纹连接头连接母螺纹水枪。
为了能快速连接两把不同型号的水枪，NLB也提供一端是左旋螺纹另一端是右旋螺纹的连接头。
| 型号 | 描述 | 最大直径 | 长度 | 管的尺寸 |
| RTLC-3 | 1/16"FNPT | 9.53mm | 22.86mm | 1/16” |
| RTLC-7 | 1/16"FNPT*1/4”FNPT | NA | NA | 1/4”*1/16” |
| RTLC-2 | 1/8”FNP | 12.7mm | 22.86mm | 1/8” |
| RTLC-1 | 1/4"-28FNPT | 8mm | 50.8mm | 1/4” |
| RTLC-4 | 1/4”FNPT | 15.88mm | 28.58mm | 1/4” |
| RTLC-5 | 3/8"FNPT | 20.7mm | 28.58mm | 3/8” |
| RTLC-6 | 1/2”FNPT | 25.4mm | 50.8mm | ½” |
| BM12268 | 1/4"-28LHF | 9.53mm | 54.61mm | 1/4” |
| BM22604 | 1/4”RHF | 9.53mm | 54.61mm | 1/4” |
| BM22605 | 1/4”-28LHF*RHF | 9.53mm | 54.61mm | 1/4” |
| BL1218 | 1/4"-28RHF | NA | NA | 3/8” |
| BM13606 | 3/8”-24LHF | 14.3mm | 50.8mm | 3/8” |
| BM22606 | 3/8”-24RHF | 14.3mm | 50.8mm | 3/8” |
| BM22607 | 3/8”-24RHF*LHF | 14.3mm | 50.8mm | 3/8” |
| BM22615 | 3/8"LHF*9/16”-18LHF | 16.76mm | 60.96mm | 3/8”*9/16” |
| BM22616 | 3/8"RHF*9/16”-18RHF | 16.76mm | 60.96mm | 3/8”*9/16” |
| BM20092 | 3/8”-24RHM | 14.15mm | 82.55mm | 9/16” |
| BM20093 | 9/16”-18RHF | 16.76mm | 60.96mm | 9/16” |
| BM20094 | 9/16”-18LHF | 16.76mm | 60.96mm | 9/16” |
| BM22619 | 9/16”-18LHF*RHF | 16.76mm | 60.96mm | 9/16” |
