Return-Path: Received: from marvkaye.olsusa.com ([205.245.9.95]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Fri, 14 Jan 2000 02:44:28 -0500 Message-Id: <3.0.3.32.20000114024953.00a02dc0@olsusa.com> Date: Fri, 14 Jan 2000 02:49:53 -0500 To: lancair.list@olsusa.com From: Marvin Kaye Subject: Tube and Pipe Fittings X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Posted for Ross Connell (rossc@lancair.com): The latest series of questions about tapping into fuel lines and past questions about fitting indicate that some information on this subject may be useful. In general all fittings used on Lancairs are "SAE 37deg. /JIC"(all flare fittings), "NPTF/NPT" pipe (tapered pipe threads that seal by thread interference) and "SAE O RING" (straight threads that use an "O" ring to seal). NPTF/NPT fittings sizes are stated in terms that have little to do with the actual fitting size, i.e. DASH/SIZE THRD OD THRDS/INCH -1..1/16NPT .315" 27 -2..1/8NPT .410" 27 -4..1/4NPT .540" 18 -6..3/8NPT .680" 18 -8..1/2NPT .840" 14 -12..3/4NPT 1.05" 14 -16..1NPT 1.32" 11-1/2 "SAE O RING" is a straight thread the size of which indicates the port I.D. (more or less). DASH/SIZE THRDS/INCH -2..1/8 5/16-24 -3..3/16 3/8-24 -4..1/4 7/16-20 -5..5/16 1/2-20 -6..3/8 9/16-8 -8..1/2 3/4-16 -10..5/8 7/8-14 -12..3/4 1 1/16-12 -14..7/8 1 3/16-12 -16..1 1 5/16-12 The 37 deg. JIC fittings are the same dash number and thread size as the "SAE O RING" and size indicates the tubing O.D. For steel Weatherhead fittings our best source is NAPA. The fittings with a "C" as first digit in part number are forged 1 piece MS rated. Those with a TF are 2 piece and not MS rated. You may be able to obtain Weatherhead Catalog # 202E (dated 4/93) or a more current edition. Another catalog is Aeroquip Industrial Connector # JA 316E. The selection from each of these may be larger or smaller depending upon which you choose. With these catalogs you should be able to find any fitting you need. Ross Connell >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>