1、DOD-W-b3Y7YB 9999906 I1979793 368 DOD- W - 6 3 4 74B 17 JUNE 199 4 SUSPERSEDING DOD-W-63474A 15 May 1984 MILITARY SPECIFICATION WASHERS, SPRING TENSION, METRIC, GENERAL SPECIFICATION FOR 1. SCOPE 1.1 SCOB. This specification covers metrically dimensioned steel, spring tension washers: cylindrically
2、curved, waved and Belleville spring. 2. APPLICABLE DOCUMENTS 2.1 Go vernment docu ments. 2.1.1 SDec ifications. sta ndards , and handboo ks. Unless otherwise specified, issues of referenced documents are those in effect at the time of solicitation. Information regarding the latest government issue o
3、f government documents and adopted non-government documents can be obtained from the Department of Defense Index of Specifications and Standards. SPECIFICATIONS FEDERAL QQ-P-416 - Plating, Cadmium (Electrodeposited) MIL I TARY MIL-C-81562 - Coatings, Cadmium, Tin-Cadmium and Zinc (Mechanically Depos
4、ited) DOD-W-63474/1 - Washers, Spring Tension, Cylindrically Curved and Waved, Metric DOD-W-63474/2 - Washer, Spring Tension, Belleville Spring, Metric Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addresse
5、d to: Commander, Defense Industrial Supply Center (DISC), 700 Robbins Ave, Phila., PA 19111-5096, ATTN: DISC-EFA, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5310 DI STRIBU TION STATEMENT A.
6、 Approved for public release; distribution is unlimited. 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-W-b3474B 99999Ob 1979794 2T4 = DOD-W-63474B STANDARDS MILITARY MIL-STD-1312-6 - Fasteners, Test Methods, Hardness (Copies of specifications
7、, standards, handbooks, drawings and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Ot her pub 1 icat ions . Unless otherwise specified, issues of referenced doc
8、uments are those in effect at the time of solicitation. Information regarding the latest issue of non-government documents not adopted by the government can be obtained from the organization responsible for their publication. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/ASME 46.1 - Surface Text
9、ure (Surface Roughness, Waviness and Lay) ASME/ANSI B18.18.2M - Inspection and Quality Assurance for High Volume Machine Assembly Fasteners (Applications for copies should be addressed to the American National Standards Institute, 11 West 42nd Street, New York, NY 10018.) AMERICAN SOCIETY FOR TESTIN
10、G AND MATERIALS (ASTM) ASTM-A684/A684M - Steel, High-Carbon, Strip, Cold-Rolled Soft, ASTM B633 - Coating, Zinc, Electroplated ASTM D3951 - Standard Practices for Commercial Packing ANSI/ASTM E384 - Standard Test for Microhardness of Materials ASTM E1444 - Magnetic Particle Inspection, Standard Prac
11、tice For ASTM F1470 - Guide to Fastener Sampling for Specified Untempered Quality, Standard Specification For Mechanical Properites in Performance Inspection (Applications for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) SOC
12、IETY OF AUTOMOTIVE ENGINEERS, INC. (SAE) AMs 6455 - Steel, Sheet, Strip and Plate 0.95 Cr-0.22V (0.48-0.53C (SAE 6150) UNS G61500) (Applications for copies should be addressed to the Society of Automotive Engineers, 400 Commonwealth drive, Warrendale, PA 19056. (Industry association specifications a
13、nd standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- . I DOD-W-b3474B 999790b I1979795 I130 DOD-W-63474B 2.
14、3 Order of Rrecedence . In the event of a conflict between the text of this specification and the references; other than specification sheets, cited herein, the text of this specification shall take precedence 3. REQUIREMENTS 3.1 spec ification sheets . The individual item requirements shall be as s
15、pecified herein and in accordance with the applicable specification sheet. In the event of any conflict between requirements of this specification and the specification sheet, the latter shall govern (see 6.2). 3.2 Material. Recycled and reclaimed materials shall be used to the maximum extent practi
16、cable. Washers shall be made of spring steel of suitable quality to meet the requirements specified herein. 3.2.1 sp rina steel . Spring steel shall conform to any of the steel Grades 1050 thru 1095 (UNS G10500 thru UNS G10950), as specified in ASTM A684/A684M. 3.3 sur face hardness a nd finish 3.3.
17、1 su rface hardness . Washers shall have a surface hardness of 43-50HRC (82-85.5HR15N, for washer thickness less than 1 mm). 3.3.2 Protect ive finish. When specified on the applicable specification sheet, washers shall be cadmium plated either electrodeposited or mechanically deposited. 3.3.2.1 Cad
18、mium Plating.Electrodewos ited. Electrodeposited cadmium plating shall be in accordance with QQ-P-416, Type II, Class 2 (7.6 micrometers thick) . 3.3.2.2 Cadmium Platins.Mechanicallv deDos ited. Mechanically deposited cadmium plating shall be in accordance with MIL-C-81562, Type II, Class 2 (7.6 mic
19、rometers thick.) 3.3.2.3 Zinc. Mechi. nically Depos ited. Mechanically deposited zinc plating shall be in accordance with MIL-C-81562, Type II, Class 2. 3.4 Dimensions. Dimensions and tolerances shall be in accordance with the applicable specification sheet and shall apply after protective finishes.
20、 3.4.1 Edcres a nd bu rrs. All sharp edges and burrs shall be removed. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-W-63474B 3.4.2 Concentricity . The outside diameter (OD) of the washers Over shall be limits: To concentric with the inside d
21、iameter within the following I OD (mm) CONCENTRICITY (pm) L./ I I 1 3 125 I I 3 6 150 I I 6 I 10 I 180 I 310 370 80 120 435 L/ Concentricity dimensions apply to flat spring washers before being formed. 3.5 Surface rouu hness. Washers shall have a maximum surface roughness of 3.2 pm, determined in ac
22、cordance with ANSI/ASME 46.1. 3.6 Decarburization. Washers shall be free from decarburization. 3.7 Cracks. Washers shall be free from cracks, flaws and pits in any location. A crack is a clean crystalline fracture passing through or across the grain boundaries without inclusion of foreign elements.
23、3.8 Performance. 3.8.1 Loading. (Cylindrically curved and waved washers). The washers shall withstand the compression load specified in Table IV and regain its free height within the limits stated on the applicable specification sheet. 3.8.2 Prolonued loading. Cylindrically curved and waved washers
24、shall withstand the compression load specified (see Table IV) for a minimum of 48 hours and regain its free height within the limits stated on the applicable specification sheet. 3.8.3 Load-deflection. Belleville spring washers shall meet the compression load and deflection requirements set forth on
25、 the applicable specification sheet. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-W-b3474B 999990b 1979797 TO3 DOD-W-63474B 3.8.4 Permanent set . After one deflection to flat, the Belleville spring washers shall return to their original heig
26、ht within the tolerances of the original height. 3.8.5 Reweated loading. The Belleville spring washers shall withstand the repeated loading test specified in 4.4.3.9 without indication of permanent set in excess of 10 percent of the original free height and wihout cracking or breaking. 3.9 Workmansh
27、iw. Washers shall be free of surface contamination, tool marks and other imperfections which may adversely affect useability. 4. QUALITY ASSURANCE PROVISIONS 4.1 Reswo nsibility for inswect ion. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the perfo
28、rmance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The G
29、overnment reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Quality CO nformance inswect ion. 4.2.1 Inswect ion of wroduct for de livery. Inspection o
30、f product for delivery shall consist of Group A and B inspections, in accordance with the requirements of ASME/ANSI B18.18.2M. 4.2.1.1 Inswection lot . An inspection lot shall consist of all washers covered by a single specification sheet, produced under essentially the same conditions, and offered
31、or inspection at any one time . 4.2.1.2 uect Ai ion. Group A inspection shall consist of the inspection specified in Table I. 4.2.1.2.1 Samwlinu wlan. Statistical sampling and inspection for Subgroup 1 shall be in accordance with the criteria called out in ASTM F1470. Major and minor defects shall b
32、e as defined in Table II. Sampling and inspection for Subgroup 2 shall be in accordance with the criteria called out in ASTM F1470. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. INSPECTION DOD - W - 6 3 4 74B REQUIREMENT TEST METHOD SAMPLING 4.
33、2.1.2.1.1 Rejected lots (Subs rouD - i). Rejected inspection lots may be resubmitted for Government acceptance only if the manufacturer performs i00 percent inspection on the washers of the lot for those characteristics which were defective and resulted in rejection of the lot and removes all defect
34、ive units and resubmits the lot for quality conformance inspection. Resubmitted lots shall be kept separate from new lots and shall be clearly identified as resubmitted lots. Resubmitted lots shall be inspected using the reinspection criteria specified in ASTM F1470 paragraph 7.3 and shall not there
35、after be tendered for acceptance unless the former rejection or requirement of correction is disclosed. Subsroup 1 Dimensions 3.4 4.4.1 Protective finish 3.3.2 4.4.3.2 Surface roughness 3.5 4.4.1 Subs rouD -2 Cracks 3.7 4.4.3.3 4.2.1.2.1.2 Rejected lots (Suba rom 2). If an inspection lot is rejected
36、, the manufacturer may rework it to correct the defects, or screen out the defective units, and resubmit or reinspection. Resubmitted lots shall be inspected using reinspection criteria specified in ASTM F1470 paragraph 7.3 and shall not thereafter be tendered for acceptance unless the former reject
37、ion or requirement of correction is disclosed. Such lots shall be separate from new lots and shall be clearly identified as reinspected lots. As specified per ASTM F1470 TABLE I. CROUP A INSPECTION. 4.2.1.2.2 mosition D of samDle u nits. Sample units which have passed all the Group A inspections may
38、 be delivered on the contract or purchase order. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CATEGORY REQUIREMENT PARAGRAPH 3.3.1 3.6 3.8.3 3.8.1 3.8.4 3.8.2 3.8.5 Critical Ma or 101 102 103 104 105 Minor 201 2 02 203 2 04 205 TEST METHOD PARAG
39、RAPH 4.4.3.1 4.4.3.4 4.4.3.7 4.4.3.5 4.4.3.8 4.4.3.6 4.4.3.9 DOD-W-63474B 9999906 1979799 BBb - DOD-W-63474B TABLE II. CLASSIFICATIO N OF DEFEC TC. DEFECT None defined Inside diameter not as specified (see 3.4) Outside diameter not as specified (see 3.4) Evidence of cracks or pits (see 3.7) Thicknes
40、s not as specified (see 3.4) Free height not as specified (see 3.4) Protective finish missing or incomplete (see 3.3.2) Other dimensions not as specified (see 3.4) Concentricity not as specified (see 3.4.2) Surface roughness not as specified (see 3.5) Workmanship (see 3.9) INSPECTION METHOD SIE L/ S
41、IE L/ Visual SIE L/ SIE I/ Visual SIE I/ SIE I/ SIE L/ Visual - 1/ Standard inspection equipment 4.2.1.3 Grouw B inswect ion. Group B inspection shall consist of the tests specified in Table III in the order shown. They shall be performed on sample units that have been subjected to and have passed t
42、he Group A inspection. TABLE III. GROUP B INSPECTION. INSPECTION Surface hardness Decarburization Load deflection Loading Permanent set Prolonged loading Repeated loading 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-W-63V74B W 7999906 I17798
43、00 328 W DOD-W-63474B 4.2.1.3.1 Sa mplins plan . The sampling plan shall be in accordance with ASTM F1470. 4.2.1.3.2 Defectives. If the number of defects exceed the number allowed in the specified sampling plan, the sample shall be considered to have failed. 4.2.1.3.3 DisDos ition of samwles . Sampl
44、e units which have been subjected to Group B inspection shall not be delivered on the contract or purchase order. 4.2.1.3.4 Noncomwliance. If a sample fails to pass the specified inspection plan, the manufacturer shall notify the qualifying activity and the cognizant inspection activity of such fail
45、ure and take corrective action on the materials or processes, or both, as warranted, and on all units of product which can be corrected and which are manufactured under essentially the same materials and processes, and which are considered subject to the same failure. Acceptance and shipment of the
46、product shall be discontinued until corrective action, acceptable to the qualifying activity has been taken. After the corrective action has been taken Group B inspection shall be repeated on additional sample units (all tests and examinations, or the test which the original sample failed, at the op
47、tion of the qualifying activity). Group A inspection may be reinstituted; however, final acceptance and shipment shall be witheld until the Group B inspection has shown that the corrective action was successful. In the event of failure after reinspection, information concerning the failure shall be
48、furnished to the cognizant inspection activity and the qualifying activity. 4.3 Inswect ion of pac kasinq. The sampling and inspection of the preservation-packaging, packing and container marking shall be in accordance with the requirements of ASTM D3951. 4.4 Methods o f inswect ion. 4.4.1 Visual a
49、nd dimensional. The washers shall be examined to verify that physical dimensions, surface roughness and workmanship are in accordance with the applicable requirements of 3.4, 3.5, 3.9 and 4.2.1.2. 4.4.2 Mate rial inspect ion. Material inspection shall consist of certification supporting verifying data that the materials used in fabricating the washers are in accordance with the applicable requirements of 3.2, or the material requiremen
