Fed std h28 3 unj unified controlled root radius threads ansi b1. November1976, generalservices administration gsa accepted nbshandbook h28 federalstandard. Fedstdh288 screw thread standards for federal services. Fedstdh288 screw thread standards for federal services section 8 dryseal pipe threads. Parker straight pipe fittings are manufactured from cold drawn barstock.
Fedstdh289a not 3 screwthread standards for federal. Fed stdh285 unified miniature screw threads fedstdh286. Fed fedstdh28 6a screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread formssuperseding fed std h28 6 standard by federal specifications and standards, 03051985 amendments available. Amendment by federal specifications and standards, 02272019. Fedstdh285 unified miniature screw threads fedstdh286. This standard was approved by the commissioner, federal supply service, general services administration, for the use of all federal agencies. Dimensional inspection of nonthreaded products and helical inserts specified in table 2 shall consist of measurements to determine that diameter and length conform to specification requirements. Both the fed std h28, as well as the sae as8879 standards, refer back to the asme b1.
Read online fed std h28 screwthread standards for federal services book pdf free download link book now. All mounting and terminal screws, nuts, and washers shall be of corrosionresistant material or shall be protected against corrosion. Download fed std h28 screwthread standards for federal services book pdf free download link or read online here in pdf. Fed std h28, screwthread standards for federal services. Fedstdh28 10 31 august 1978 superseding nbs handbook h28 part 11, section. Other straight threads having at least 6 engaged threads are authorized provided that the calculated shear strength is at least 10 times the test pressure of the cylinder. Fedstdh28 chamfer datasheet, cross reference, circuit and application notes in pdf format. Fed stdh286a, screwthread standards for federal services, section 6 gages. On a straight thread, the pitch diameter is the diameter of the cylinder whose surface passes through the thread profiles at such points as to make.
Complete document screwthread standards for federal services, section, stub acme threads. Special requirements for modified tapered threads are. Fedstdh282b screw thread standards for federal services. Mcpherson, chairman, interdepartmental screw thread committee. When this standard is approved by the department of defense and federal agencies and is incorporated into federal standard h28 20 fed std h28 20, screw thread standards for federal services, section 20, the use of this standard by the federal government is subject to all the requirements and limitations of federal standard h28 20 fed std h28. Fed fed std h28 6a notice 3 validation 3 screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread forms. Fedstdh28a 28 december 1994 superseding fedstdh28 31 march 1978. For example, n8s handbook h28, part 1, section 3 will be detailed standard fed std h28 3 which must be procured. Fed std handbook h28 was a predecessor ansiasme b1. It also updates these standards in accordance with the latest issues of asme b1 series screw thread standards, and provides corrections where necessary. Acceptability of screw threads shall be in accordance with fed std h28 20, system 21. All parker steel pipe fittings are zinc plated with silver chromate zinc chromium 6 free.
Eia36437, editorial changes, increased contact force, added test to table ii, group a, added section 4. Fed std h28 6a1 not 1 screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread forms. Parker pipe fitting shaped products elbows, tees and crosses are hot forged and machined. Do203aa 1n6391 ct 2000 fed std h28 chamfer 1n6391 jan text. Threads shall extend to within two threads or less of the bearing surface of the head, except that all lengths over 2. Pdf section updated october 2017 f3 parker hannifin corporation tube fittings division columbus, ohio. How port connections work tapered pipe threads there are three types of tapered threads commonly used in industrial applications.
Fed std h28 31 march 1978 superseding nbs handbook h28. Fedstd48 tolerances for steel wrought products, and for. Changes from the revisions are indicated by using strikethrough to mark deleted text and. Fedstdh28 6a 1 not 1 screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread forms. This modal will allow the user to download citation information or export specific fields of data into one of three file formats. The part number shall consist of the basic ms sheet number. All figures and tables will maintain the established designations, prefixed with the section. Fed std h28 en3155 en3155, contact iso 2669 en3155016m2018 en 3155016 nsa9321 fedstd h28 asne text.
Fed std h28 screwthread standards for federal services. All appendices will be incorporate in the basic document fed std h28 with other general. Information and documents presented here are works of the u. Whereas, the mean uaxinu fillet stress at the edge of thread sector is 4. Where is j series thread data in machinist handbook. When this standard is approved by the department of defense and federal agencies and is incorporated into federal standard h28 fed std h28, screw thread standards for federal services, section, the use of this standard by the federal government is subject to all the requirements and limitations of federal standard h28 fed std h28. Gauges and gauging screw thread and gauging standard. Add bp before dash number for cadmium plated manganese screw. Thread designations and standards for threads used in. Design and use information are also provided when necessary. The angle of countersink shall be 100 degrees inclusive. The dkmmition of the tolerances, allowamwt and crest clearances for the six general w cls is illustrated in figures 2.
Fedstdh28 31 march 1978 appendix a4 methods of wire measurements of pitch diameter of 600 deg. This chart is a reference guide only to give you an idea as to the approximate color. This standard was approved by the commissioner, federal supply service, general services administration, for the use of. Fedstdh28 screwthread standards for federal services. Screw thread standards for federal services as3094 thru 3097 as3080 thru 3083 special locking torque inserts. If you could put it on a pdf file so it was possible to print the pages then i.
Fed std h28 7 screw thread standards for federal services, section 7, pipe threads, general purpose. Part 1, part ii and part 111 will now be promulgated as a fully coordinated fed std h28, maintaining the exi stf ng sections and identifying them with slant lines. Fedstdh289anot1597040screwthread standards for federal services section 9 gas cylinder valve outlet and inlet threads. Fedstdh286a, screwthread standards for federal services, section 6 gages. For breech ring with buttress thread, the mean maximum fillet stress at the center of thread sector is 4. In november 1976, the istc was terminated, and the general services. Number of poles 1 1pole, protected hardware for threadneck 0 without hardware 2 hex nut m12x0, ac 115 v 400 hz. Thread forms covered include fed std h28 standards and special forms generated by user supplied input. Department of defense handbook us army reverse engineering handbook guidelines and procedures this handbook is for guidance only. When threadsspecifiedwiththeobsoleteamericannationalthreadclassesaretobe.
Pdf milprf19500553 1n6391 t4lds07 fed std h28 do203aa 1n6391 ct 2000 fed std h28 chamfer 1n6391 jan. With the exception of sections ix and x, and appendix 5, handbook h28 1944 and the 1950 supplement thereto, are superseded by parts i and ii of handbook h28 1957 and the federal specifications listed in appendix 6 of part i of h28 1957. Fed std h28 4 table v20 thread designations and standards for threads used in fluid connectors continued on the next page 1 used in some pneumatic components where shortened thread depth is required because of lack of enough material due to component size limitations. Fedstdh2812 screwthread standards for federal services section 12 acme threads. Beneficial comments recommendations, addition, deletions and. There seems to be no reason to maintain two separate yet identical standard systems. Government and are not subject to protection in the u. The file extension pdf and ranks to the documents category. Fed std h28 20 go and no go ring or plug thread gages. Fed std h28 9 gas cylinder valve outlet and inlet threads. Fed fedstdh286a screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread formssuperseding fedstdh28 6 standard by federal specifications and standards, 03051985 amendments available. Acceptability of screw threads shall be in accordance with fed std h28 20. Nptnptf bspt metric taper all three thread styles noted above use the same basic metalto. Documents sold on the ansi webstore are in electronic adobe acrobat pdf format, however some iso and iec standards are available from amazon.
The civilian agency acquisition council and the defense acquisition regulations council councils are proposing to amend the federal acquisition regulation far to revise policies and procedures for contractor submission of material safety data sheets msdss. It has methods for determining pullout as well as high. This document was uploaded by user and they confirmed that they have the. The data in fed std h28 is slowly, revision by revision, being removed and placed in ansiasme b1 standards. Al1 users of federal standards should keep them up to date by in. Not only does it define the various systems, but also includes detailed charts on what gages are acceptable for each thread element to be measured. Fedstdh286a1 not 1 screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread forms. It has its origin in the us military complex and is still used there as the primary source of reference for military paint. Page 6 november, 2019 4 cylinders with fiber damage cuts, abrasions, etc. All books are in clear copy here, and all files are secure so dont worry about it. The analysis method, whict includes static and dynamic analysis using elastic theory, provids thread joint performance indicators in the form of static load capacity and fatigue safety factor for virious life cycle.
Fed fedstdh286a notice 3 validation 3 screwthread standards for federal services section 6 gages and gaging for unified screw threadsun and unr thread forms. Alloy steel inserts shall have a hardness range of 3640 hrc. In the similar test, 38 pitch v threads were tried in the breech mechanism. Skip to content show main menu navigation below close main menu navigation below.
Fed std h28 31 march 1978 federal standard screwthread standards for federal services. The rgb hex code is a reference to what is shown on your monitor. This document is available in either paper or pdf format. A standard nogo gauge is in accordance with fed std h28 for both before and after plate conditions. This simple design allows permanent, positive adjustment of screws in any position, secure against vibration or impact. Fedstdh28b includes the basic screw thread dimensional and acceptability requirements for common screw thread forms and applications. Federal standards fed std h28 screwthread standards for federal services fed std 123 marking for shipment civil agencies rrc271f 4 activities outside the federal government may obtain copies of federal specifications. This procedure includes a requirement for the supplier sample submission as defined in sqr2. Screw threads shall be class 2a or 2b, as applicable see. Fed std h28 2 screw thread standards for federal services, section 2, unified inch. Use the download button below or simple online reader. Some pdf files are protected by digital rights management drm. It was published as a single blue paper bound book and contained part i 1969 part ii 1957 part iii 1957.
Commerce had developed and published nbs handbook h28, screwthread standards for federal services. Specific requirements for particular screw threads, gages, etc. Reducers, expanders, conversions parker pipe fittings. Fedstd311gen, leather, methods of sampling and testing, 8300, gl. Federalstandard standardsforfederalservices section10 iiatioiialhosecouplingand x 957 firehosecouplingthreads. Fedstdh286a1 not 1 screwthread standards for federal. Thegageor treasuringinstmmnt forrefereepurpses shallmet itscalibration. This revision consolidates the metric supplement, y14.
The standards whf ch had been publ f shed as n8s handbook h28. Screw thread standards for federalservices as3094 thru 3097 as3080 thru 3083 special locking torque inserts. Code states that the authority for development of federal standards for procurement purposes rests with the general services administration gsa. Attention unified screw thread scholars possessing a copy of nbs handbook h28 screw threads for federal services 1969.
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