B11-5 REVISED MAY, 2016 © Copyright 2023. All rights reserved. No portion may be copied or reproduced in any manner. SOSMETAL PRODUCTS INC. FITTINGS/HYDRAULICS/HOSE B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B20 B21 AIR TOOLS / AIR-LINE COUPLERS & PLUGS Interchangeability of pneumatic couplings is determined by NIPPLE DESIGN. Learn to identify the basic nipple types & coupler and nipple interchange will become easy. There are (7) different designs currently used in the automotive market. (4) of these (7) cover 97% of all quick couplings used today. We provides complete interchange to the (4) primary designs. The three designs NOT covered are shown at the bottom of the page. SCHRADER DIAMOND “U” GRACO STANDARD 1. The Design Selection Like name designs, no matter which manufacturer, are inter-changeable. NOTE: One DESIGN will NOT interchange with another design. 2. The Size Selection There are three BODY SERIES sizes— Standard 1/4” and Heavy Duty 3/8” and 1/2”. To interchange, the coupler and nipple must have the same body size. 3. Thread Size To check size of pipe thread fittings, refer to catalog page B13-2. Coupler size is important, since too small a coupling can act as a restriction in the air line, reducing both the pressure and volume of air reaching the end of the hose. It is generally recommended that the body size of the coupler be matched to the I.D. of the hose being used. Thus 1/4” I.D. hose should be fitted with 1/4” I.D. couplings. Generally speaking, 3/16” I.D. hose should be fitted with 1/4” couplings, while 5/16” I.D. hose may be fitted with either 1/4” or 3/8” couplings, depending on the volume and pressure required at the end of the hose. 1/2” I.D. hose should be fitted with 1/2” couplings. HOW TO IDENTIFY INTERCHANGE DESIGNS OTHER DESIGNS HOW TO INTERCHANGE COUPLERS AND NIPPLES HOW TO DETERMINE BODY SIZE/ COUPLER SIZE/BASIC SIZE WARNING: COUPLERS IN THIS SECTION ARE FOR USE WITH SHOP AIR ONLY. l Maximum Inlet Pressure: 300PSI l Maximum Temperature: 250°F l Seals: Buna-N This design has been adopted by many coupler manufacturers, including Milton, Hansen, Aro, Lincoln, and Schrader. It will work with either “sleeve” type or “push” type couplers. No matter what the coupler looks like, if it mates with this nipple, it is an “Industrial / Milton Interchange” design. It can be identified by its 3/16” pilot and its flat-bottomed, “V”-shaped ball groove. INDUSTRIAL / MILTON DESIGN TRU-FLATE ARO LINCOLN INDUSTRIAL / MILTON MILTON A-STYLE “210” STYLE SERIES 1/4” BASIC SIZE l Coupler is push type. l Coupler bodies are steel plated to resist rust. l Air flow: 34 SCFM l Plugs are case hardened steel plated to resist rust. Female Coupler Female Plug Male Plug COUPLERS PLUGS PART PART CONNECTION NUMBERQTY NUMBERQTY 1/4 NPT Female 100775 5 100778 10 1/4 NPT Male 100776 1 100777 10 Male Coupler MILTON L-STYLE LINCOLN INTERCHANGE SERIES l Coupler is push type. l Coupler bodies are steel plated to resist rust. l Air flow: 32 SCFM l Plugs are case hardened steel plated to resist rust. MILTON H-STYLE INDUSTRIAL INTERCHANGE SERIES l Coupler bodies are steel plated to resist rust. l Air flow: 67 SCFM l Plugs are case hardened steel plated to resist rust. COUPLERS PLUGS PART PART CONNECTION NUMBERQTY NUMBERQTY 1/4 NPT Male 101834 1 101839 1 3/8 NPT Female 101835 1 101838 1 3/8 NPT Male 101836 1 101837 1 COUPLERS PLUGS PART PART CONNECTION NUMBERQTY NUMBERQTY 1/4 NPT Female 100790 5 100792 10 1/4 NPT Male 100794 1 100791 10 Female Plug Male Coupler Male Plug Female Coupler Female Plug Male Coupler Male Plug Female Coupler 3/8” BASIC SIZE MILTON T-TRU-FLATE/PARKER INTERCHANGE SERIES l Coupler bodies are brass. l Air flow: 40 SCFM l Plugs are case hardened steel plated to resist rust. Female Plug Male Coupler Male Plug Female Coupler COUPLERS PLUGS PART PART CONNECTION NUMBERQTY NUMBERQTY 1/4 NPT Female 100785 5 100784 10 1/4 NPT Male 100786 5 100783 10 1/4” BASIC SIZE
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