1、METRIC DOD-W-70336 w/Amendment 1 8 April 2005 MILITARY SPECIFICATION WASHERS, (METRIC) , GENERAL SPECIFICATION FOR Inactive for new design after 1 October 1999 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE: 1.1 Scope. This specification
2、 covers metrically dimensioned carbon steel, corrosion resistant and phosphor bronze lock washers, helical spring, internal tooth and external tooth. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this s
3、pecification to the extent specified herein. Unless otherwise 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 there to, cited in the solicitation. SPECIFICATIONS MILITARY MIL-DTL-13
4、924 Coating, Oxide, Black, for Ferrous Metals DOD-W-70336/l - Washer, Lock Spring, Helical, Regular Series (Metric) DOD-W-70336/2 - Washer, Lock Spring, Helical, Light Series (Metric) DOD-W-70336/3 - Washer, Lock, Flat-Internal Tooth (Metric) DOD-W-70336/4 - Washer, Lock, Flat-External Tooth (Metric
5、) STANDARDS MIL-STD-1907 Inspection, Liquid Penetrant and Magnetic Particle, Soundness Requirements for Materials, Parts and Weldments. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch or http:/assist.daps.dla.mil or from the Standardization Document Order Des
6、k, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center Philadelphia, ATTN: DSCP-ITAA, 700 Robbins Ave, Philadelphia, PA 19111-5096 or emailed to dscpg however, final acceptance and shipment
7、shall be withheld 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 furnished to the cognizant inspection activity and the qualifying activity. 4.3 Deleted 4.4 Methods of inspectio
8、n. 4.4.1 Visual and 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 Material inspection. Material inspection shall consist of certification supporti
9、ng verifying data that the materials used in fabricating the washers are in accordance with the applicable requirements of 3.2. 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-W-70336 w/Amendment 1 4.4.3 Hardness and finish inspection. 4.4.3.1 H
10、ardness inspection. Samples taken as specified in 4.2.1.3 shall tested for surface hardness in accordance with NASM1312, Test Method 6 and 3.3.1. 4.4.3.2 Finish inspection. Samples taken as specified in 4.2.1.2 shall be inspected for adequacy of plating in accordance with applicable specification of
11、 3.3.2. 4.4.3.3 Magnetic particle (cracks) inspection. Carbon steel washer samples taken as specified in 4.2.1.2 shall be subjected to magnetic particle inspection in accordance with ASTM E1444. Corrosion resistant steel (CRES) 300 Series austenitic and phosphor bronze samples, selected per 4.2.1.2,
12、 shall be subjected to penetrant inspection in accordance with MIL-STD-1907. There shall be no evidence of cracks or pits as specified in 3.8. 4.4.4 Magnetic permeability inspection. Corrosion resistant steel (CRES) washers selected in accordance with 4.2.1.2 shall be tested for compliance with the
13、magnetic permeability requirement of 3.9. The test shall be conducted in accordance with ASTM A342. 4.4.5 Decarburization. Samples taken as specified in 4.2.1.3 shall be microscopically examined at a magnification of 100 diameters. There shall be no evidence of decarburization, the etchant shall be
14、5 percent nital. 4.4.6 Free height test. Helical spring washers selected in accordance with 4.2.1.3 shall be subjected to a compression, twice pressed flat, released, and the free height measured. The free height after the second compression shall conform to the requirements of 3.10.1. 4.4.7 Compres
15、sion and flattening test. Lock tooth washers selected in accordance with 4.2.1.3 shall be compressed flat and held for twelve hours. Upon release, the free height shall conform to the requirements of 3.10.2. There shall be no evidence of fracture of teeth or rim, or flattening of teeth with respect
16、to rim when examined in accordance with 4.4.1. 5. PACKAGING 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to con
17、tact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is availabl
18、e from the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-W-70336 w/Amendment 1 6. NOTES 6.1 Inten
19、ded use. Helical spring lock washers. The helical spring lock washers covered by this standard are intended for general industrial application. They have the function of: (1) providing greater bolt tension per unit of applied torque for tighter assemblies; (2) providing hardened bearing surfaces to
20、create more uniform torque control; (3) providing uniform load distribution through controlled radii section- cut-off; and (4) providing protection against looseness resulting from vibration and corrosion. Tooth lock washers. The tooth lock washers in this standard are intended for general industria
21、l application. They serve to promote the retention of fasteners, such as bolts, screws and nuts, to the component parts of an assembly by increasing friction between the fasteners and the assembly and by providing spring takeup. 6.2 Ordering data. 6.2.1 Acquisition requirements. Acquisition document
22、s should specify the following: a. Title, number and date of this specification and the applicable specification sheet. b. Applicable specification part number (see 3.1). c. Packaging requirements (see 5.1) 6.3 Subject term (keyword) listing. Washer, Lock Spring, Helical, Metric Washer, Lock Spring,
23、 Helical, Regular Series Washer, Lock Spring, Helical, Light Series Washer, Lock, Metric Washer, Lock, Flat-Internal Tooth, Metric Washer, Lock, Flat-External Tooth, Metric 6.4 Amendment notations. The margins of this specification are marked with vertical lines to indicate modifications generated b
24、y this amendment. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations. Cu
25、stodians: Preparing Activity: Amy - AR DLA - IS Navy - OS Air Force- 99 Review Activities: (Project 5310-2715) Army - AT Navy MC, SH Air Force- 71 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. 8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
