1、MIL-B-20289D(MC) 10 SEPTEMBER 1990 SUPERSEDING MIL-B-20289C(MC) 19 August 1982 MILITARY SPECIFICATION BUTTONS, INSIGNIA, PLASTIC This specification is approved for use by the U. S. Marine Corps, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Def
2、ense. 1. SCOPE 1.1 Scope. This specification covers the requirements for plastic insignia buttons. 1.2 Classification. The buttons shall be of the following types, classes, and sizes, as specified (see 6.2). Button sizes shall be in U. S. “Lines“ as shown below. One itline“ equals one-fortieth of an
3、 inch. Type I - Regular Shank Class 1 - Hard Soldered Construction Class 2 - Swedge Construction Type II - Short Shank Class 1 - Hard Soldered Construction Class 2 - Swedge Construction Sizes (Line) 27 40 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be
4、 of use in improving this document should be addressed to the Commanding General (PSE-C), Marine Corps Research, Development, and Acquisition Command, Washington, DC 20380, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document
5、or by letter. AMSC-NA FSC 8455 DISTRIBUTION STATEMENT A. distribution is unlimited. Approved for public release; Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-20287D 84 W 777770b 0450307 I m, 2. APPLICABLE DOCUMENTS 2.1 Government documents.
6、2.1.1 Specifications, standards and handbooks. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Stan
7、dards (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL PPP-B-636 - Boxes, Shipping, Fiberboard PPP-B-676 - Boxes Setup STANDARDS FEDERAL FED-STD-151 - Metals: Test Methods FED-STD-406 - Plastics: Methods of Testing MILITARY MIL-STD-105 - Sampling Procedures and Tabl
8、es for MIL-STD-129 - Marking for Shipment and Storage Inspection By Attributes (Unless otherwise indicated, copies of federal and military specifications, standards and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094
9、. 2.1.2 Other Government publications. The following other Government publication forms a part of this document to the extent specified herein. Unless otherwise specified, the issue is that cited in the solicitation. LAWS AND REGULATIONS U. S. Postal Service Manual (Application for copies of the man
10、ual should be addressed to the Superintendent of Documents, U. S. Government Printing Office, Washington, DC 20402.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-20289D 84 = 9799906 0450308 3 2.2 Non-Government publications. The following
11、documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are
12、 the issues of the documents cited in the solicitation. UNIFORM CLASSIFICATION COMMITTEE Uniform Freight Classification Rules (Application for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) NATIONAL MOTOR FREIGHT TRAFFIC
13、ASSOCIATION, INC. National Motor Freight Classification (Application for copies should be addressed to the American Trucking Association, Inc., ATTN: Tariff Order Section, 1616 P Street, N.W., Washington, DC 20036.) (Industry association specifications and standards are generally available for refer
14、ence from libraries. They are also distributed among technical groups and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, sup
15、ersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Standard sample. Standard samples are furnished solely for guidance and information to the contractor (see 6.4). Variations from this specification may appear in the sample, in which case the s
16、pecification shall govern. 3.2 First article. When specified (see 6.2), the contractor shall furnish a sample unit for first article inspection and approval (see 4.4 and 6.3). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-20287D 4 777770b 0
17、450307 5 MIL-B-20289D(MC) 3.3 Material. 3.3.1 Bodv. The body shall be molded from thermosetting melamine formaldehyde plastic of a quality to meet the requirements of this specification. 3.3.1.1 Color and finish. The color shall be black shade BT, cable 62001, to match the approved color standard (s
18、ee 6.4). The buttons shall have a nonglossy finish and shall show good fastness to light when tested in accordance with 4.6.1. 3.3.2 Shank and shank plate. The shank and shank plate shall be made of low or red brass. 3.3.3 Bodkin fastener. When specified (see 6.2), each button shall be furnished wit
19、h a bodkin fastener, permanently attached through the eye of the shank. be made from hard drawn nickel silver wire with nickel plated brass cap and shall conform to the applicable design and dimensions shown on figure 1. 3.3.4 Tomles, rinq. When specified (see 6.2), ring toggles shall be furnished d
20、etached. made from hard-drawn steel wire, zinc coated to withstand salt spray test specified in 4.6.6 for a period of 96 hours without indication of red rust. Ring toggles shall conform to the applicable design and dimensions shown on figure 1. the regulation Marine Corps eagle and anchor design sha
21、rply produced upon a convex face. furnished to the contractor by the Government. Molds shall produce true impressions of the standard hubs. contractor shall remain the property of the Government and the contractor shall be held responsible for their condition. shall not be altered or damaged in any
22、manner. of the contract, or when requested, the hubs shall be returned as directed by the contracting officer. The bodkin fastener shall The ring toggles shall be 3.4 Desiun. Buttons shall be ornamental, shank type, with 3.5 Molds. Production molds shall be made from hubs 3.5.1 Care of Government pr
23、opertv. Hubs furnished to the Hubs Upon completion 3.6 Construction. 3.6.1 Bodv. The plastic body shall be molded from the material specified in 3.3.1 and shall conform to the design, shape and size required by the Government furnished hubs. plastic body shall withstand the curing test (4.6.2) witho
24、ut showing more than moderate loss in luster or more than slight The 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-7 _ MIL-B-20287D q -q77770b 0450310 II W MIL-B=20289D(MC) evidence of chalking; shall finish the size specified with a plus or minu
25、s tolerance of one line (4.6.3) permitted; and shall withstand compression test (4.6.4) as follows: Size Pounds faveracre of 5 determinations) 27-line 300 40-line 500 NOTE: Slight evidence of chalking is a change which is perceptible with difficulty. Moderate loss in luster is one which is readily p
26、erceptible without close examination but is insufficient to markedly alter the original appearance of the sample. 3.6.2 Thickness. The overall thickness of the finished body shall be as follows: Size 27-line 40-line Thickness flinesk 11 shank not positioned as specified, i,e., when a rod is inserted
27、 in the eye of the shank, the rod is not parallel with the vertical axis of the 40-line and 45-line buttons or is not parallel with the horizontal axis of the 27-line button. e. Not clean, e.g., solder spatter affecting use. 113 209 4.5.3 Examination of buttons for defects in dimensions. Any dimensi
28、on that is not within the specified tolerances shall be classified as a defect. The inspection level shall be S-1 (see 6.5) 4.5.4 Testina of end item. Testing of completely fabricated buttons shall be performed in accordance with Table I tests for the characteristics shown therein. The number of det
29、erminations per sample unit shall be two. 4.5.5 Examination for preparation of deliverv reauirements. An examination shall be made to determine that packaging, packing, and marking requirements of section 5 of this specification are complied with. Defects shall be scored in accordance with the list
30、below. shipping container fully prepared for delivery with the exception that it need not be sealed. Defects of closure listed below shall be examined on shipping containers fully prepared for delivery. containers in the end item inspection lot. The inspection level shall be S-1 (see 6.5). EXAMINE D
31、EFECT The sample unit shall be one The lot size shall be the number of shipping Marking (exterior and Omitted; incorrect; illegible; or of interior) improper size, location, sequence, or method of application. Size or stock I 9 Provided by IHSNot for ResaleNo reproduction or networking permitted wit
32、hout license from IHS-,-,-Materials Workmanship Weight or content MIL-B-20289D(MC) number of end item does not correspond to size or stock number marking of intermediate and/or shipping container. Any component missing. Any compound damaged, affecting serviceability. Inadequate application of compon
33、ents, such as incomplete closure of case liners, container flaps, loose strapping, or inadequate stapling. Bulging or distortion of containers. Number of intermediate packages is more or less than required; gross/net weight exceeds requirements. 4.5.5.1 Examination for count of buttons in intermedia
34、te containers. determine conformance with package marking and specified quantity. The lot size shall be the number of intermediate containers. Buttons packaged for shipment shall be examined to 4.6 Tests. 4.6.1 Colorfastness to liaht. The colorfastness to light shall be determined by test method 603
35、1 of FED-STD-406, except that the specimen shall be the finished button and the time element shall be 20 hours. 4.6.2 Curina test. Buttons shall be immersed in a boiling solution of 0.8 percent by weight sulfuric acid for 10 minutes and immediately thereafter rinsed in water, wiped dry and examined.
36、 The examination for chalking and loss in luster shall be made by holding the buttons at arms length and examining them under a strong white light. 4.6.3 Size test. The diameter of the buttons measured in lines shall denote the size. The standard United States button line measure, in which one line
37、is equal to 1/40 inch, shall be used for both size and thickness. 4.6.4 CornDression strenath. Compression strength of the The buttons shall be conducted using apparatus which permits gradual application of the load either manually or automatically. load indicating mechanism shall be capable of show
38、ing the total compression load carried by the button; however, the gage should be so calibrated that the load deflection at the point of button failure should be at least 1/3 of the total capacity of the gage. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
39、om IHS-,-,-MIL-B-20287D 8i.I 9777706 - rl *rl (d Fr LI O W pi : rl rl *rl CI id W w Q) LI. LI O W E: ho PI 82 o? : t Q) LI 8d dd =r RE u) w O u) w O 0 8 rl 00 rl m e . 4 rl m m . . . Ca ? m El id YI LI O rl O u rl X X X X m m w . . 44 m moI0 m. mm m . . o . e m m . . M 6“ c, Ca 0 c, da, OU 6“ 4 k =i
40、 u UiJ 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-2029D 4 = 9999906 0450337 4 W E s MIL-B-20289D(MC) Buttons should be placed face up on a rimmed circular hole of sufficient depth to accommodate the button shank. diameter shall be 0.43
41、- 0.44 inch (7/16“) for 40-line and 45-line buttons and 0.25 inch (1/4“) for 27-line buttons. The rim shall be approximately 0.125 inch in height and its inside diameter such that the button fits with a small amount of “play“. All horizontal surfaces shall be parallel. The button face shall be locat
42、ed under suitable metal surface parallel to the block face (i.e., compression head or press platen) and tested to failure. Failure is defined as the first sign of a crack in the button visible to the naked eye (a visible crack is usually signified by a discernably audible internal rupture). In addit
43、ion, superficial chipping or crumbling of the surface of the raised insignia shall not exceed 0.050 inches per minute. load in pounds which produces this failure shall be taken as the compression strength of the buttons. The results for the series of buttons tested shall be averaged for determinatio
44、n of conformance to the specification requirement. 4.6.5 Shank Dull-strenath test. The buttons shall be mounted in a suitable shaped jig having a hole of proper size to clear the shank anchorage but capable of holding the body of the button. pendulum (inclined balance) type of tensile testing machin
45、e. A heavy wire shall be inserted in the eye of the shank and shall be clamped in the other jaw of the machine. load is applied shall move at a uniform rate of 12 inches plus or minus 2 inches per minute under no load. Five buttons shall be tested and the average result reported. The hole The The ji
46、g then shall be clamped in one of the jaws of a The jaw at which the 4.6.6 Salt spray test. The salt spray test shall be in accordance with method 811 of FED-STD-151 to determineconformance with 3.3.4. 5. PACKAGING 5.1 Packaainq. Packaging shall be level A or commercial as specified (see 6.2). 5.1.1
47、 Level A. Two gross (288) plastic insignia buttons, of one type, class, and size shall be bulk packaged in a Set-up paperboard box conforming to type I, variety 1, class A, Style 4 of PPP-B-676, assembled and closed as specified in the appendix thereto . 5.1.2 Commercial. Two gross (288) plastic ins
48、ignia buttons, of one type, class, and size shall be packaged in accordance with the contractors normal practice. 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-20289D(MC) 5.2 Packinq. Packing shall be level B or commercial, as 5.2.1 Level
49、B. Plastic insignia buttons of one type, specified (see 6.2). class, and size packaged as specified in 5.1, shall be packed within a fiberboard shipping container conforming to type CF or SF, class-domestic, variety SW, grade 275, style CSSC of PPP-B-636 assembled, closed and reinforced as speified in the appendix thereto. 5.2.2 Commercial. Plastic insignia buttons of one type, class, and size shall be packed in a
