1、MIL-P-60521 (5) 13 W 7977906 0338889 i.I - f 7 MLTPL (AR) AMENDMENT 5 21 December 1977 SUPERS ED1 NG MIL-P-60521 (MU) AMENDMENT 4 28 February 1974 MILITARY SPECIFICATION PROJECTILE, HEP-T, 106MM, M346A1 METAL PARTS This Amendment forms a part of Military Specification MIL-P-60521 (MU) dated 16 May 1
2、966. PAGE 1 Paragraph 2.1, under Specifications, Military, delete “MIL-P-10025“ in its entirety. Paragraph 2.1, under Standards, Military, add “MIL-STD-1169 - Packaging, Packing and Marking for Shipment of Inert Ammuni- tion Components. I Paragraph 2.1, under Standards, delete “MIL-STD-639 - Surface
3、 Roughness Values Preferred for Army Ordnance Materiel“ and substitute “ASA-B46.1 Surface Texture, Surface Roughness, Waviness, and Lay“ . PAGE 2 Paragraph 3.7.1, line 4, delete “or excessive deformation“. Paragraph 3.8.1, delete in its entirety and substitute 3.8.1, 3.8.1.1, 3.8.1.2 and 3.8.1.3. “3
4、.8.1 Metal defects, steel. 3.8.1 from crack inclusions .1 The body, including the cavity, shall be free s, splits, burst, cold shuts, pipe, porosity, , folds, seams, and other metal defects. 3.8.1.2 The body cavity shall be free of scales, fins, burrs, draw marks, laminations, imbedded foreign matte
5、r, pits and sharp edges. FSC: 1315 I THIS DOCUMENT CONTAINS .3- PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMENDMENT 5 3.8.1.3 Visual standards for evaluation of metal defects will be established for each contract after the first months p
6、roduction. However, the establishment of visual standards will not waive the requirement for compli- ance with 3,8.1.1 and 3.8.1.2 (see 6.4).“ PAGE 4 Paragraph 4.3.2, change AQLs from “0.25“ for major defects and 110.40“ for minor defects to “0.40“ for major defects and 110.6511 for minor defects. D
7、elete last line of the paragraph and substitute: “The roughness comparison specimens prescribed by ASA-B46,1 shall be used as a basis of comparison for surface roughness deter- mination. II Add Paragraph 4.3.2.a: 1*4.3.2.a Control tool manufacture.-When dimensions are marked “Control Tool Manufactur
8、e“ the dimension shall be gaged during First Article inspection and after each 250 items produced from each machine in operation. destruction of components is necessary to inspect these dimensions, measurement of the tool may be submitted provided the contractor has established correlation between t
9、ool dimensions and component dimensions prior to start of pro- duction. The contractor shall be responsible for maintaining adequate surveillance to assure drawing requirements are being met throughout the life of the tool. Corrective action will be immediately instituted by the contractor whenever
10、a defective tool control dimension is found.“ Where Paragraph 4.3.2.1, under “Critical“, add, “1. Metal defective . Visual“. Under “Major“ delete illllll in its entirety. PAGE 6 Paragraph 4 . 3 . 2.3, under “Critical“ add “1. Metal defective .Visual (Probe light) . I Under “Major“ , delete 111031 in
11、 its entirety. Page 2 of 3 Il Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-60523 (5) 33 E 7777706 0338873 2 =I MIL-P-60521 (AR) AMENDMENT 5 PAGE 7 Paragraph 4.3.2.4, under “Critical“ add, “1. Metal defective . . . . . .Visual (Probe light) I
12、. Under “Major“. delete “130“ in its entirety. PAGE 8 Paragraph 4 . 3 . 2.5 , under “Critical“ add, “3 . Metal defective . . . . . . . . .Visual (Probe light) “. PAGE 12 Paragraph 4 . 4.1 . 1 line 4 , delete the wording “cross-section“ and substitute “a cleaned inside surface“ . PAGE 13 * Paragraph
13、4.4.6.2 Line 4, delete 2000 meters and substitute 1000 meters. Paragraph 5.2.1.2, delete “MIL-P-10025“ and substitute “MIL-STD-1169 . Paragraph 5.2.1.3, delete in its entirety and Substitute: Paragraph 5.2.1.3 Gasket.-Part No. 8596149 shall be packed in accordance with MIL-STD-1169. Pack 1200 gasket
14、s in a 3 x 4 arrangement in one layer, 100 to a cell (coin wrapped in kraft paper) using interlocking separators . PAGE 14 Add Paragraph 6.4: “6.4 Visual standards.-Standards to be established at contractors plant in compliance with 3.8.1.3.“ * The margins of this amendment are marked wth an asteris
15、k to indicate where changes (additions, modifications , corrections, deletions) from the previous issue were made. 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 req
16、uirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. .Custodian : Amy - AR Preparing Activity: Project No. 1315-Al62 Army - AR - : Page 3 of 3 *US. GOVERNMENT PRINTING OFFICE: I978-7OI-l22/2290 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
