1、A-A-52300 66 = 9999974 0064413 9 W PROTRACTORS COMMERCIAL ITEM DESCRIPTION CIRCULAR AND SEMICIRCULAR, (MILS A-A-52300 March 3, 1992 The General Sewices Administration has authorized the use of this commercial item description in preference to Federal cpecification GG-P-681D. This description covers
2、circular protractors of plastic and semicircular protractors of brass or plastic for use in graphically measuring precise angles required by mapping and precision drafting techniques. Salient characteristics: Desicm. The protractors shall be as specified herein. The protractors shall have precise gr
3、aduations, letters, numbers, and shall be constructed of materials (brass or plastic) design4 to lie flat on a plane surface without stretching or warping. All graduation, letters, and numbers shall be complete, sharp, and precisely formed. Classification. Types, classes, styles, and sizes. Protract
4、ors shall be of the following types, classes, styles, and sizes. Type I - Semicircular. Class A - Graduated in degrees. Class B - Graduated in mils. Style i - Without arc extension. Style 2 - With arc extension. Sizes (diameter). 4 inches. 6 inches. 8 inches. 10 inches. 12 inches. Beneficial comment
5、s, recommendations, additions, deletions, clarifications, etc. and other data which may improve this document should be sent by letter to: Cammander, U.S. Amy Belvoir Research, Developmt and Engineering Center, ATI“: STRBE-TSE, Fort Belvoir, VA 22060-5606. AMSC N/A FSC 6675 DISTRIBUTION STATEMENT A.
6、 Approved for public release; distribution is Unlhted. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-52300 66 9999974 0064434 O A-A-52300 Type II - Circular, graduated in degrees. Style 1 - Zero to 360 degrees. Style 2 - Zero to 90 degree quad
7、rants and zero to 3 O degrees. Sizes (diameter). 6 inches. 8 inches. 10 inches. Type I, sdcircular. Type I protractors shall be of brass or plastic. Numbers may be slanted in the direction of increase. numbers on the graduated arc shall read clockwise or counterclockwise and the her row of numbers s
8、hall read in the opposite direction. The outer row of Class A. The outer edge of the arc shall be graduated in degrees so that the zero and 180 degree markc are on the horizontal axis of the protractor. axis, the graduations may be extended below that axis. graduation marks that extend below the zer
9、o and 180 degrees marks of the horizontal axis are the arc extension. When the upper edge of the crossbar forms the horizontal The Class B. The outer edge of the arc shall be graduated in mils so that the zero and 3200-mil marks are on the horizontal axis of the protractor. axis, the graduations may
10、 be extended below that axis. When the upper edge of the crossbar forms the horizontal MYTE: protractors reading mils shall be not less than three lengths; the shortest length denoting lo-mils, the medium length denoting each 5O-mil increment,.and the longest denoting each 100-mil increment. every 1
11、OO-mils in two rows of figures. A mil is defined as 1/6400 of a circle. The graduation marks for Graduation marks shall be numbered Stvle 1. Configuration of style 1 protractors shall be similar to that Configuration of style 2 protractors shall be similar to that Numbers may shown on figure 1. Styl
12、e 2. shown on figure 2. Type II, circular. Type II protractors shall be of plastic. be slanted in the direction of increase. Style 1. counterclockwise from zero to 360 degrees, starting at the horizontal axis. The her row of figures shall read in the direction opposite that of the outer row, startin
13、g on the opposite end of the horizontal axis. Configuration of type II, style 1 protractors shall be similar to figure 3. The outer row of figures shall read either clockwise or 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52300 66 9999974 0
14、064435 2 m A-A-523 O0 Style 2. The outer row of figures shall read clockwise from zero to 90 degrees; 90 to zero degrees; zero to 90 degrees; and 90 to zero degrees, starting at the left in line with the horizontal axis. her row of figures shall read clockwise from zero to 360 degrees, starting at t
15、he left in line with the horizontal axis. The Materials : Material shall be as specified herein. Brass. Brass shall be a flat rolled sheet up to arid including 0.188-inch in thickness. acceptable. Brass sheet tempered to half-hard shall be Plastic. Plastic protractors shall be made out of acrylic, m
16、ethacrylate, or any other plastic material that provides similar durability. Graduations, letters, and numberc. All graduations, letters, and nirmbers shall be cut, stamped, printed, photoprhted, etched, or indented. Graduation lines shall be uniform, shall be between 0.004 and 0.010- inch wide, ari
17、d shall have a tolerance of -+5 minutes of arc. Graduations, letters, and nunhrs shall not project above the surface of the brass or plastic. Unless otherwise specified, cut, stamped, etched, or indented graduations, letters, and nunhers shall be filled with permanent black ink or paint. of not less
18、 than four lengths; the shortest length denoting 0.5 and the longest denoting each 10-degree increment. numbered every 10 degrees in two rows of figures. graduation is not required on $-inch protractors. semicircular segment or segments from the protractor so that the width of the crossbar and the s
19、ection between the concentric arcs are equal. A vertical lhe shall be formed on the crossbar, intersecthq the horizontal axis, to indicate the vertical axis of the protractor. Deqrees. The graduation marks for protractors reading in degrees shall be Graduation marks shall be The 0.5-degree Crossbar.
20、 Each protractor shall have a crossbar fonned by removing a Brass protractors. Bracs protractors shall be flat and shall be between 0.03125 arid 0,0625-inch thick except that 4-inch protractors shall be more than 0.015625-hch, but less than 0.0625-inch thick. horizontal axis shall be along either ed
21、ge of the crossbar. line shall be formed on the crossbar to indicate the vertical axis of the protractor. used for the graduations. The A vertical The line shall be formed by the same methcd as that Plastic protractors. Plastic protractors shall be flat and shall be between 0.0625 and 0.125-hch thic
22、k. surface of the plastic and shall be readily distinguishable through the thickness of plastic. Graduations shall be on the bottom ietters and numberc may be on either surface of 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52300 66 m 99999
23、74 0064416 4 A-A-52 3 O0 the protractor but shall be in read- position when the graduated surface is placed in contact with the drawing, map, or other work being perfomied. either edge of the crossbar or within the area between the edges of the crossbar. crossbar, a bevel not less than 0.500-inch lo
24、ng shall be formed on the top surface of the crossbar along the horizontal axis, centered with the line indicating the vertical axis of the protractor. the bevel shall be not less than 0.015-inch nor more than 0.031-inch from the bottom surface of the protractor at the point of intersection of the v
25、ertical and horizontal axis. When the horizontal axis falls within the area between the edges of the crossbar, each axis shall be represented with a line formed by the same method as that used for the graduations, and at the point of intersection of the horizontal and vertical axis a 0.0625-inch dia
26、meter hole shall be drilled, countersunk or formed. The outer edge of the protractor shall be beveled on the top surface of the graduated edge. The surface and edges of finished protractors shall be true, smooth, uniform, and polished and shall be free from defects which affect the appearance or whi
27、ch might mir the serviceability or use of the protractor. The contractor shall certify that the product Horizontal axis. On plastic protractors, the horizontal axis may be along When the horizontal axis is formed by either edge of the The lower edge of Workmanship. Certification of comercial item. o
28、ffered to the Government meetc the salient characteristics of this description and that the product conforms to the producers own drawings, specifications, standards, and quality assurance practices and is the same product as the manufacturers current product offered by the contractor in the comerci
29、al marketplace for at least one year preceding the solicitation. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. Metric groducts. Products manufactured to metric dimen
30、sions will be considered on an equal basis with those manufactured us- inch-pound units, provided they fall within the tolerances specified using conversion tables Contained in the latest revision of FED-STD-376, and all other requirements of this Comercial item Description are met. If a product is
31、manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch-pound units, a request should be made to the contracting officer to determine if the product is acceptable. The contracthg officer has the option of accepting or rejecting the product. 4 Provided by IH
32、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-523 O0 Quality assurance. for the following defects. re j &ion. The circular and semicircular protrackom shall be examined Presence of one or mre defects shall be cause for 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
33、13. 14. Design not as specified. Type not as specified. class not as specified. Style not as specified. Size not as specified. Graduations, letters, and numbers not as specified. ikgrees not as specified. crossbar not as specifieded. Brass protractors not as specified. Plastic protractors not as spe
34、cified. Horizontal axis not as specified. Material not as specified. Workmanship not as specified. Packaging and marking not as specified. Recnilatow requirements. In accordance with section 23.403 of the Federal Acquisition Regulations, the Governments policy is to acquire items composed of the hig
35、hest percentage of recovered materials practicable, consistent with maintaining a satisfactory level of competition without adversely affecting performance requirements or expsirig the supplier/s employees to undue haz- from the recovered materials. Preservation, packaqinq, 13a Ckins, labelins, and
36、markinq. The preservation, packaging, packing, labeling, and marking shall be as specified in the contract or order. CID based part identification number. The following part identification nirmbering procedure is for GoveMlment purposes and does not constitute a requirement for the contractor. Part
37、or identifyins numker (PIN). protractors, circular and semicircular, (mils, degrees) shall be as follows: The part or identify- number for A57300- XX - 1 - - 1 -X CID Document identifie Type (I or II) Class (A or B) Style (1 or 2) Size (4, 6, 8, 10, or 12) Material (B = Brass, P = Plastic) 5 Provide
38、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-52300 bb I 9999974 0064438 8 = A-A-52 3 O0 Notes. herein and include the followiq infomiation in procurement documents: Title, number, and date of this item description. When the commercial item descripti
39、on is issued for acquisition, the commercial item certification clause must appear in the solicitation. The order- activity shall spi type, class, style, size, and material required. The procuring agency should specify the preferred options permitted 1. 2. 3. FED-STD-376 is available from the Standa
40、rdization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) The following is a suggested source of supply for this item description (Campetition is not limited to this source.): . 1. Lutz Superdyne, Inc., 815 Broad Ave., P.O. Box 57, Ridgefield, NJ 07657. The prepa
41、ring activity for this item description is the US Army Belvoir Research Development and n-igineering Center, ATIN: STRBE-rSE, Fort Belvoir, VA 22060- 5606. mmARY l“nmST: cuctodians Amsr-m Air Force - 99 Review activitv DIA - GS Navy - MC Air Force - 82 CML AGENCY COORDINATING ACTMTIES. GSA-FSS PREPA
42、RING ACTMTY: Army - ME User activities Navy - CG 6 Project 6675-0895 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-52300 66 = 7779774 0064437 T = e A-A-52300, I U 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
43、icense from IHS-,-,-i A-A-52300 66 m 9999974 0064420 b m A-A- 5 2 30 O L c O o L 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a. A-A-52300 bb 9999974 0064423 -. A-A- 5 2 30 O FIGURE 3. Type II, style I, protractor. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
