Camlock Couplings vs. Showerhead Arm Threads
Comparing 2 standards across 16 specifications. 16 key differences identified.
Camlock (Cam and Groove) couplings are heavy-duty industrial quick-connect fittings standardized under Commercial Item Description A-A-59326 (formerly MIL-C-27487) and EN 14420-7. Classified into Types A through F, male adapters insert into female couplers and lock via twin rotating cam lever arms against an elastomeric gasket for leak-free fluid transfer.
Residential shower arms and flexible handheld hoses utilize standardized 1/2-inch pipe interfaces governed by ASME A112.18.1. The fixed wall supply arm uses a 1/2"-14 NPT tapered male thread that seals into an in-wall drop-ear elbow, while the exposed showerhead outlet features a 1/2"-14 NPSM straight thread sealing via a compressed rubber washer.
Specification Comparison Table
16 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
A-A-59326D / EN 14420-7 / DIN 2828 / MIL-C-27487 | — |
|
Type A
|
Male Adapter × Female NPT / BSPP thread | — |
|
Type B
|
Female Coupler (with cam arms) × Male NPT / BSPP thread | — |
|
Type C
|
Female Coupler × Hose Shank (for hose barbs) | — |
|
Type D
|
Female Coupler × Female NPT / BSPP thread | — |
|
Type E
|
Male Adapter × Hose Shank | — |
|
Type F
|
Male Adapter × Male NPT / BSPP thread | — |
|
Standard Diameters
|
1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4", 6" | — |
|
Body Materials
|
316 Stainless Steel (250 PSI) | Aluminum (150–250 PSI) | Brass | Polypropylene (100 PSI) | — |
|
Governing Standard
|
— | ASME A112.18.1 / CSA B125.1 / NSF 61 |
|
Wall Inlet Thread
|
— | 1/2"-14 NPT (Male Tapered Pipe Thread, 60° flank) |
|
Showerhead Outlet Thread
|
— | 1/2"-14 NPSM (Male Straight Mechanical Pipe, 60° flank) |
|
Handheld Hose Female Swivel
|
— | 1/2"-14 NPSM / ISO 228 G 1/2" conical swivel nut |
|
Maximum Showerhead Flow Rate
|
— | 1.8–2.0 GPM (6.8–7.6 L/min) @ 80 PSI (EPA WaterSense) |
|
Wall Sealing Method
|
— | 3–5 wraps of PTFE thread tape on 1/2" NPT wall nipple |
|
Showerhead Sealing Method
|
— | EPDM mesh filter screen / flat rubber washer in swivel nut |