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Hofmann Fluid Power, Inc.

Plug Profiles (pdf) Fluid Compatibility Coupling Design/Selection Product Attributes

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Quick Connect Couplings

Our vast line of pneumatic quick connect couplings are available in an extensive range of hose coupling connection styles, sizes and materials. All pneumatic couplers are rated for 300 psi and under. Made in the USA.

Miniature Pneumatic Quick Connect Couplings

One and Two Way Miniature Quick Release Couplings

One and Two Way Coupling

Our miniature quick connect couplers have a 5/8” outer diameter and can be used in many different hose coupling applications; fuel maintenance, lubrication and food processing systems to name a few.

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Straight Thru Miniature Quick Release Couplings

Straight Thru Coupling

Our miniature quick connect couplers have a 5/8” outer diameter and can be used in many hose coupling different applications; fuel maintenance, lubrication and food processing systems to name a few.

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One Way Industrial Interchange Pneumatic Couplings

Series A Quick Release Couplings

Series A Coupling (1/4" Body Size)

This is an extremely versatile industrial pneumatic coupler that can be machined with a variety of alternative adapters. Conform to A-A59439 (formerly mil spec C-4109F) standards.

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Series B Quick Release Couplings

Series B Coupling (3/8" Body Size)

Offered in brass or steel or with stainless steel bodies. Optional chrome or electroless nickel plating. Conforms to A-A59439 (formerly mil spec C-4109F) standards.

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Series C Quick Release Couplings

Series C Couplings (1/2" Body Size)

Stainless steel components are standard along with a sleeve guard style, safety vent and automatic one hand quick connects. Conforms to A-A59439 (formerly mil spec C-4109F) standards.

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Series D Quick Release Couplings

Series D Couplings (3/4" Body Size)

The mating plugs are 360 brass, heat treated, plated steel, or 303 stainless steel. 316 stainless steel is also available. Conforms to A-A59439 (formerly mil spec C-4109F) standards.

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Series A, B, C & D Replacement Parts

Series A, B, C & D Replacement Parts

What better way to keep your hose couplers in top shape then to use our high quality replacement parts.

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Additional Pneumatic Couplings

ARO Series Quick Release Couplings

ARO Series Coupling

ARO Series quick release couplings are available in 1/4" and 3/8" body; some with automatic one hand connect, and interchange fully with all ARO interchange couplers.

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Lincoln Series Quick Release Couplings

Lincoln Series Coupling

Lincoln Series (L) quick release coupling comes standard with a buna seal and have a 1/4" body made of brass with steel components.

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Ring Lock Series Quick Release Couplings

Ring Lock Series Coupling

Ring Lock Series (RL) quick release coupling has a unique wire ring locking mechanism that locks or disconnects the plug to the coupler with a 1/4" turn.

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Twist Lock Series Quick Release Couplings

Twist Lock Series Coupling

Twisted Lock Series (TL) quick release coupling is an interchangeable with Schrader Standard and Heavy Duty series couplers and available in 1/4” and 1/2” body sizes.

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Truflate Series Quick Release Couplings

Truflate Series Coupling

Automotive Interchange Series (T) couplers are interchangeable with all truflate couplers and available in 1/4” and 3/8” body sizes.

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