1、- B MIL-W-703Y2 53 W 7779906 0307903 O MIL-W-70342 4 November 1988 MILITARY SPECIFICATION WASHER, FLAT, METRIC GENERAI; SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers flat metric was
2、hers. 1 2 “mes. Washers shall be of the following types : Type I Regular Type II Narrow “pe III Wide 2. APPLICABLE DocuMEm 2.1 Govermnt documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this specification to the extent specified herein. Unless o
3、therwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, citd in the solicitation. SPECIFICATIOS FEDERAL WP-35 - Passivation Treatments for Corrosion Resisting Steel WP-416
4、 - Plating, Cadmium (Electrodeposited) PPP-H-1581 - Hardware (Fasteners and Related Items) , Packaging of Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in inproving this document should be addressed to Commander, US Army Armament Research, Dev
5、elopment and . Engineering Center, ATIN: SlCAFl-ZC-S, Picatinny Arsenal, W 07806-5000 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. i . AWC N/A THIS DOCUMENT CONTAINS PAGES FSC 5310 DISTRIBUTION STATEMENT
6、A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-70342 53 W 977970b 0309704 2 M c 5 MIL-W-70342 MILITARY EGL-W-70342/1 MIL-W-70342/2 Mu;-W-70342/3 MIL-W-70342/4 MIL-W-70342/5 - Washer, F
7、lat, Regular Series (Type I), Carbon Steel, - Washer, Flat, Regular Series (Type 1) I Cm, Metric - Washer, Flat, Narrow Series (Type II), Carbon Steel, - Washer, Flat, Wide Series (Type 111) , High Strength, - Washer, Flat, Wide Series (Type 111) , Carbon Steel, Metric Metric Alloy Steel, Metric Met
8、ric (Copies of specifications, standards and other government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity. ) 2.2 Other publications. The following documents form a part
9、 of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS shall be t
10、he issue of the nongovernment documents which is current on the date of the solicitation. AS?MA109 - Steel, Strip, Carbon, Cold-blled %TM A453 - Bolting Materials, High-Temperature, 50 to 120 KSI Yield Strength, with Expansion Coefficients Comparable to Austenitic Sheets AS?M B633 - Electro-Deposite
11、d Coatings of Zinc on Iron and Steel ASTM E18 - Rockwell Hardness and RockWeil Hardness of Metallic Materials, Standard Test Methods for (Application for copies should be addressed to ASI“IM 1916 Race Street, Philadelphia, PA 19103.) Provided by IHSNot for ResaleNo reproduction or networking permitt
12、ed without license from IHS-,-,-, c MIL-W-70342 53 9799706 0307905 4 W MIL-W-70342 (Nongovernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other inf
13、ormational services. ) 2.3 Order of precedence. In the event of a conflict between the text of this spec.ification and the references cited herein (except for associated detail specifications, specification sheets or PS standards), the text of .this specification shall take precedence. Nothing in th
14、is specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMEms 3.1 Specif ica however, final acceptance and shipment shall be withheld until the Group C inspection has shown that the corrective action was successful. In the ev
15、ent of failure after reinspection, information concerning the failure shall be furnished to the cognizant inspection activity and the qualifying activity. 4.3 Methods of inspection. 4.3.1 Visual and dimensional examination. Each washer taken as specified in 4.2.2.1 shall be examined to verify confor
16、mance with this specification. Examination shall be conducted in accordance with Table III. “- 4.3.2 Protective finish and surface treatment test. The carbon or alloy steel washers shall conform to the applicable protective finish and surface resistant steel washers shall meet requirements of 3.5.1.
17、3. treatment test WP-416 and AS24 B633 as specified in 3.5.1. Corrosion 4.3.3 Hardness test. Washers shall be test& for surface hardness in accordance with MIL-S“D-1312, Test Method 6. 4.3.4 Materials inspection. Materials inspection shall consist of certification supported by verifying data that th
18、e materials used in fabricating the washers are in accordance with the requirements of 3.2 prior to such fabrication. 4.3.5 Inspec tion of packas ins. The sampling and inspection of the preservation, packing, and container marking shall be in accordance with the requirements of PPP-H-1581. 5. PACKAG
19、ING 5.1 cackaqinq requirements. The requirements for packaging shall be in accordance with PPP-H-1581 (see 6.2) . 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-70342 6. NOTES 6.1 Intended use. This specification covers flat washers, for gen
20、eral purpse, aircraft and general metric bolt and nut application. Their purpose is to provide an increased bearing surface area, and to prevent galling of the base material. 6.2 Orderinq data. 6.2.1 Acquisition requirements. Acquisition documents should specify the following: a. Title, number, and
21、date of this specification and applicable specification sheet or applicable Military Standard. b. Applicable military specification number (s) or standard (s) (see 3.1). c. Level (degree) of packaging protection in accordance with PPP-H-1581 (see 5.1) . 6.3 Subject term (key word) listinq. Washer ,
22、Flat, Metric Washer, Flat, Carbon Steel Washer, Flat, Cres Washer, Flat, Narrow Series Washer, Flat, High Strength Washer, Flat, Wide Series 6.4 Definition. A crack is a clean crystalline fracture passing through or across the grain boundaries without inclusion of foreign elements. Custodians : Army-AR Navy - AS Air Force - 99 Review activities: Army - ER DLA - IS User activities: Army - CE, GL, MI Navy - K, SH, YD I .- Preparing activity: Army - AR Agent: DLA - IS (Project 5310-1576) 8 “ I“ P Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
