1、AEROSPACE STANDARDMA1784Issued 1987-07Reaffirmed 2006-05Spacers and Washers, Procurement Specification For, MetricFSC 5310 & 53651. SCOPE:1.1 Type:This specification covers metric aircraft quality spacers for use as positioners for tubes, flat washers for use as load spreaders, galling protection of
2、 adjacent surfaces and or material compatibility, and key or tab washers for use as locks for bolts, nuts and screws.1.2 Application:Primarily for use in aerospace propulsion systems.2. APPLICABLE DOCUMENTS:The following publications form a part of this specification to the extent specified herein.
3、The latest issue of Aerospace Material Specification (AMS) shall apply. The applicable issue of other documents shall be as specified in AMS 2350.2.1 SAE Publications:Available from the SAE, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.2.1.1 Aerospace Material Specifications:AMS 2350 Standards
4、 and Test MethodsAMS 2640 Magnetic Particle InspectionAMS 2645 Fluorescent Penetrant Inspection2.2 ANSI Publication:Available from American National Standards Institute, 1430 Broadway, New York, NY 10018.ANSI/ASME B46.1 Surface Texture (Surface Roughness, Waviness and Lay)SAE Technical Standards Boa
5、rd Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibil
6、ity of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2006 SAE International All rights reserved. No part of this publication may be reproduced, stored in a
7、 retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: Cus
8、tomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org RATIONALE This document has been reaffirmed to comply with the SAE 5-year Review policy. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE MA1
9、784 - 2 -2.3 ASTM Publication:Available from American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.ASTM E340 Macroetching Metals and Alloys2.4 U.S. Government Publications:Available from Commanding Officer, Naval Publications and Forms Center, 5801 Tabor Avenue, Philad
10、elphia, PA 19120.2.4.1 Federal Specification:PPP-H-1581 Hardware (Fasteners and Related Items), Packaging of2.4.2 Military Standards:MIL-STD-105 Sampling Procedures and Tables for Inspection by AttributesMIL-STD-1312 Fasteners, Test Method3. TECHNICAL REQUIREMENTS:3.1 Material:Shall be as specified
11、on the part drawing.3.2 Dimensions:The dimensions and geometric tolerances of completed parts, after all processing including plating when required, shall conform to the requirements on the part drawing.3.2.2 Surface Texture: Surface texture of completed parts, prior to plating or coating, if requir
12、ed, shall conform to the requirements on the drawing, determined in accordance with ANSI/ASME B46.1.3.3 Passivation:When specified on the part drawing, parts made from corrosion resistant steel shall, after finishing, be degreased and then immersed in one of the following solutions for the time and
13、the temperature shown, rinsing, and drying:3.3.1 One volume of nitric acid (sp gr 1.42) and 9 volumes of water for not less than 20 min. at room temperature.3.3.2 One volume of nitric acid (sp gr 1.42) and 4 volumes of water for 30 40 min. at room temperature.3.3.3 One volume of nitric acid (sp gr 1
14、42) and 4 volumes of water for 10 15 min. at 60 70C.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE MA1784 - 3 -3.4 Product Marking:Each part shall be identification marked as specified on the p
15、art drawing.3.5 Plating or Coating:When required, plating or coating shall be as specified on the part drawing.3.6 Direction of Grain:When specified on the drawing, direction of grain on parts, macroetched in accordance with ASTM E340, shall be as shown on the part drawing.3.7 Quality:Parts shall be
16、 uniform in quality and condition, clean, sound, smooth, and free from burrs and foreign materials and external imperfections detrimental to their performance.3.8 Nondestructive Inspection:3.8.1 Fluorescent Penetrant Inspection: Parts shall show no evidence of cracks, seams, laminations, machining t
17、ears, or laps when subjected to fluorescent penetrant inspection in accordance with AMS 2645.3.8.2 Magnetic Particle Inspection: Parts shall show no evidence of cracks, seams, laminations, machining tears, or laps when subjected to magnetic particle inspection in accordance with AMS 2640.4. QUALITY
18、ASSURANCE PROVISIONS:4.1 Responsibility for Inspection:The vendor of parts shall supply all samples for vendors tests and shall be responsible for performing all required tests. Results of such tests shall be reported to the purchaser as required by 4.4. Purchaser reserves the right to perform any c
19、onfirmatory testing deemed necessary to ensure that the parts conform to the requirements of this specification.4.2 Classification of Tests:The inspection and testing of parts are classified as acceptance tests as in 4.3.1 which are to be performed on each production inspection lot.4.3 Production In
20、spection Lot:A production inspection lot shall be all finished parts of the same part number, made from a single heat of alloy, heat treated at the same time to the same specified condition, produced as one continuous run, and submitted for vendors inspection at the same time.Copyright SAE Internati
21、onal Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE MA1784 - 4 -4.3.1 Acceptance Tests: The acceptance tests shall be performed on each production inspection lot. The acceptance tests consists of all tests specified in Tab
22、le I.4.3.2 Acceptance Test Sampling:4.3.2.1 Non-Destructive Test - Visual and Dimensional: A random sample will be selected from each production inspection lot, the size of the sample to be as specified in Table II. The classification of defects for parts shall be as specified in Table III. Defects
23、not classified in Table III shall be classified as Minor B defects. All dimensional characteristics are considered defective when out of tolerance.4.3.2.2 Non-Destructive Inspection: Parts shall be subjected to fluorescent penetrant inspection or magnetic particle inspection when specified on the pa
24、rt drawing.4.4 Reports:The vendor of parts shall furnish with each shipment a report stating that the chemical composition of the parts conforms to the applicable material specification, showing the results of tests to determine conformance to the acceptance test requirements, and stating that the p
25、arts conform to the other technical requirements of this specification. This report shall include the purchase order number, this specification number, contractor or other direct supplier of material, part number, nominal size, and quantity.5. PREPARATION FOR DELIVERY:5.1 Packaging and Identificatio
26、n:5.1.1 Parts having different part numbers shall be packed in separate containers.5.1.2 Each container of parts shall be marked to show the following information:PART NAME _MA1784PART NUMBER _LOT NUMBER _PURCHASE ORDER NUMBER _QUANTITY _MANUFACTURERS IDENTIFICATION _5.1.3 Containers of parts shall
27、be prepared for shipment in accordance with commercial practice to ensure carrier acceptance and safe transportation to the point of delivery. Packaging shall conform to carrier rules and regulations applicable to the mode of transportation.5.1.4 For direct U.S. Military procurement, packaging shall
28、 be in accordance with PPP-H-1581.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE MA1784 - 5 -6. ACKNOWLEDGMENT:A vendor shall mention this specification number in all quotations and when acknowl
29、edging purchase orders.7. REJECTIONS:Parts not conforming to this specification or to modifications authorized by purchaser will be subject to rejection.8. NOTES:8.1 For direct U.S. Military procurement, purchase documents should specify not less than the following:Title, number and date of this spe
30、cification, and applicable part standard or part drawing.Part number of part desired.Quantity of parts desired.Level (degree) of protection in accordance with PPP-H-1581, ordering data.8.2 Washers meeting the requirements of this specification have been classified under Federal Supply Classification
31、 (FSC) 5310 and 5365.TABLE I. Summary of Acceptance TestsCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE MA1784 - 6 -TABLE II. Sampling Data, Visual & Dimensional CharacteristicsSample Size (n),
32、Acceptance Number (Ac), and Rejection Number (Re)for AQL 1.0% and 4.0%Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE MA1784 - 7 -TABLE III. Classification of DefectsPREPARED BY SAE COMMITTEE E-25,GENERAL STANDARDS FOR AEROSPACE PROPULSION SYSTEMSCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
