1、7 GG-C-5506 66 777777Ll 0033373 O I s GG-C-550B April 25, 1977 SWERSEDING Fed. Spec. GG-C-550a January 19, 1966 FEDERAL SPECIFICATION COMPASS, DRAFTING, PIVOT, DROP SPRING .BOW: PEN AND PEEJCIL, WITH CASE This specification was approved by the Commissioner, Federal Supply Service, General Services A
2、dministration, for the use of all Federal agencies. 1. SCOPE 1.1 Scope. This specification covers one type of drop-spring-bow drafting compass with pen and pencil attachments, and case. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids or requ
3、est for proposal, form a part of this specification to the extent specified herein: Federal Specifications: QQ-S-781 - Strapping, Steel, and Seals. TT-1-528 UU-P-223 - Paper, Drawing. CCC-C-531 - Cloth, Tracing. PPP-B-601 - Boxes, Wood, Cleated-Plywood. - Ink, Drawing, Waterproof, Black. FSC 6675 7.
4、 THIS DOCUMENT CONTAINS 12 PAGES. O Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GG-C-5 SOB PPP-B-621 - Boxes, Wood, Nailed and Lock-Corner . PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall. Federal
5、Standard: Fed. Std, No. 123 - Marking for Shipment (Civil Agencies). (Activities outside the Federal Government may obtain copies of Federal Specifications, Standards, and Handbooks as outlined under General Information in the Index of Federal Specifications and Standards and at the prices indicated
6、 in the Index. which includes cumulative supplements as issued, is for sale on a subscription basis by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. The Index, (Single copies of this specification and other Federal specifications required by activities outsi
7、de the Federal Government for bidding purposes are available without charge from Business Service Centers at the General Services Administration Regional Offices in Boston, New York, Washington, DC, Atlanta, Chicago, Kansas City, MO, Fort Worth, Denver, San Francisco, Los Angeles, and Seattle, WA. (
8、Federal Government activities may obtain copies of Federal . Specifications, Standards, and Handbooks and the Index of Federal Specifications and,Standards from established distribution points in their agencies. ) Military Specification: - MIL-P-116 - Preservation-Packaging, Methods of. Military Sta
9、ndards: MIL-STD-105 - Sampling Procedures and Tables MIL-STD-129 - Marking for Shipment and Storage. MIL-STD-130 - Identification Marking of US for Inspection by Attributes. Military Property O Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Copies
10、of Military Specif icatione end StandatdB required by suppliers in connection with specific prcurement functions should be obtained %rom ehe procurihg activity or as directed by the contracting officet,) 2.2 Other publicatisns. The folloiKing documents form a part of this specification to the extent
11、 specifiedLhereifi6 issue is Identified, the issue in affect OR date of invitation for bids or request for proposal shall apply. Unless a specific American Society Por Testing and Materials (ASTM) Standards! B 122 - Copper-Nickel-Zinc Alloy (Nickel Silver) and Copper-Nickel Alloy Plate, Sheet, Strip
12、, and Rolled Bar. and Bars for Reforging. of Wood. Hardness of Metallic Materials. A 314 D 2016 - Standard Methods of Test for Moisture Content E 18 - Stainless and Heat-Resistin$ Steel Billets - Rockwell Hardness and Rockwell Superficial (Application for copies should be Eiddressed ko the American
13、Sochty for Testing and Mateltiailc, 1916 Race Street, Philadelphia, BA 10183.) National Motor- -Freigh.t_ Traffic Association, he-!-, Agent: National Motor Freight Classification. (Application fo? copies should be addressed to the American Trueking Traffic Department, 1616 P Street, NY, Associations
14、, enc., ATTEf: Washington, DC 20036.) Uniform Classification Cqmittee, Agent; Uniform Freight Classification. (Application for copies should be addressed to the Unifona Classifb cation Committee, ATTN; South Riverside Plaza, Chicago, PL Tariff Publishing Officer, horn 1166, 222 60606.) 3 ci o Provid
15、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-b GG-C-55OB bb 9977774 0011376 b I GG-C-55OB 3. REQUIREMENTS 3.1 Description, The compass shall consist of a pivot rod, a pivot sleeve, and spring bow with interchangeable pen and pencil attachments. A case s
16、hall be furnished with each compass. 3,2 First article (first-produced compass with case). The supplier shall furnish one or more compasses with cases as Specified (see 6,2) for examination and testing within in the time frame specified (see 6.2) to prove that his production methods and choice of de
17、sign detail will produce a compass with case that will comply with the requirements of this specification. section 4 and shall be subject to surveillance and approval by the Government (see 6.3) . Examination and tests shall be as specified in 3,3 Material. Material shall be as specified herein. Mat
18、erials not specified shall be selected by the supplier and shall be subject to all provisions of this specification, 3.3.1 Copper-nickel-zinc alloy. The copper-nickel-zinc alloy shall. conform to ASTM B 122, alloy 735 or 752. 3.3.2 Corrosion-resisting steel, Corrosion-resisting steel shall conform t
19、o ASTM A 314, type 302 or 430. 3,4 Design. The design of the compass shall be so as to enable the instrument to draw circles ranging in she from 1/32 inch to not less than 1 inch in diameter, between 4 and 5 inches, Overall length of the compass shall be 3.5 Pivot rod. The pivot rod shall be of corr
20、osion-resisting steel and shall have a hardened needlepoint. knurled corrosion-resisting metal head, concave on the upper surface Co fit the fingertip. The needlepoint shall have a 1/4-inch minimum range of movement above and below the point of the pen blades. movement may be adjustable at the optio
21、n of the supplier. pen is in contact with the tracing medium, the pivot rod shall extend at least 1/2 inch above the pivot sleeve, The pivot rod shall have a The range of When the 3.6 Pivot sleeve. The pivot-sleeve shall be of copper-nickel-zinc alloy, corrosion-resisting steel, chromium-plated bras
22、s, or aluminum. Aluminum, if used, shall be anodized. freely and move vertically about the pivot rod with the minimum of The pivot sleeve shall rotate 4 h Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GG-C-CSOB bb 9979974 OU33377 B GG-C-5 5 OB tole
23、rance. pivot sleeve to prevent the pivot rod from falling out. of the pivot sleeve shall be tapered to provide a running fit about the pivot rod. A knurled capscrew shall be fitted into the upper end of the The lower end 3.7 Spring bow. The spring bow shall be of corrosion-resisting spring steel. to
24、 the pivot sleeve and the other end shall be attached to or have as an integral part a socket for the pen and pencil attachments. One end of the spring bow shall be securely attached 3.8 Socket. The socket shall be of corrosion-resisting steel or copper-nickel-zinc alloy and shall be designed to acc
25、ept and securely clanp the pen and pencil attachments. 3.9 Pen and pencil attachments. The pen and pencil attachments shall be designed with a shank which shall fit in one position into the socket and shall not turn after tightening of the socket setscrew. 3.9.1 Pencil. The pencil attachment shall b
26、e of corrosion-resisting steel or copper-nickel-zinc alloy and shall be designed to accept and securely clamp leads ranging in size from 0.073 to 0,083 inch in diameter. 3.9.2 a. The pen attachment shall be of corrosion-resisting steel, with or without tips of tungsten high-speed steel. either the s
27、pring-blade or spring-hinge type. shall be provided. The penpoints shall be hardened to a Rockwell hardness on the B scale of 84 to 86 for type 302 steel and 80 to 84 for type 430 steel. hardness test point shall be between 114 and 5/16 of an inch back from the penpoint tip. The pen shall permit the
28、 drawing of clean, unbroken, and uniform lines, from 0.003 inch to 0.015 inch in width, without cutting into the drawing medium. The pen shall be An adjusting thumbscrew Pen blades shall be accurately set and evenly ground. The 3.10 Screws. Adjusting thumbscrew heads shall be of copper-nickel- zinc
29、alloy, corrosion-resisting steel, or aluminum, and shall have knurled edges. Screw studs and other screws shall be of corrosion-resisting steel. Threads shall be of a size and pitch to produce smooth action. If made of aluminum, the screw heads shall be anodized. 3.11 Case. The case shall be of wood
30、 or plastic with a hinged lid. The interior of the case shall be covered with The interior of the bottom of the case shall be made with recessions for the compass parts. a dark-colored velvet lining or similar material. Hardware used in 5 Q Provided by IHSNot for ResaleNo reproduction or networking
31、permitted without license from IHS-,-,-GG-C-55OB construction of cases shall be of corrosion-resisting metal or shall be treated to resist corrosion. The case lining and outer covering, when used, shall be made fungus resistant by treating with a material which will not corrode the compass. aging te
32、st, the case shall not change appearance, shape, or dimensions, and the adherence of the covering or lining shall not be affected. When subjected to the impact test, the case shall not crack, break, chip, or otherwise be deleteriously affected. When subjected to the accelerated 3.11.1 Wood case. Whe
33、n applicable, each wood case shall be con- structed of basswood, white pine, cedar, or other lightweight wood of clear stock. The wood shall have a moisture content of not less than 7 percent nor more than 14 percent when determined in accordance with ASTM D 2016. 3,ll. 1.1 Wood case covering. Unles
34、s otherwise specified (see 6.2), each wood case shall be covered with leather of good.quality cattle- hide or morocco finished in black. 3.11.2 Plastic case. When applicable, the plastic case shall be constructed of a nonflammable or slow-burning material of suitable hardness and rigidity. absorptio
35、n under severe humidity and temperature conditions. The plastic material shall have a low moisture 3.12 Finish. All exposed surfaces of copper-nickel-zinc alloy shall have a finish produced by hard wheels. shall be polished. All exposed surfaces of steel 3.13 Identification marking (DoD only). The c
36、ompass and case shall be identified in accordance with MIL-STD-130. In addition, each compass and case will have the manufacturers name or trademark and the letters “U. S. II stamped or otherwise permanently marked on the item. 3.14 Workmanship. Compasses and cases shall be free from any defects and
37、 imperfections which. affect the appearance or which might impair the serviceability. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GC-C-55OB 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con
38、tract, the supplier is responsible for the performance of all inspection requirements as specified herein, specified in the contract, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Governmen
39、t. reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements, Except as otherwise The Government 4.1.1 Component and material inspection. The supplier is responsib
40、le for insuring that components and materials used are manufactured, examined, and tested in accordance with referenced specifications and standards. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows : (a) (b) (c) First-produced compass and cas
41、e inspection (see 4.3). Quality conformance inspection (see 4.4). Inspection of packaging (see 4.6). 4.3 First-produced compass and case inspection. 4.3.1 Examination. The first-produced compass and case shall be examined as specified in 4.5.1. shall be cause for rejection. Presence of one or more d
42、efects 4.3.2 Tests. The first-produced compass and case shall be tested as specified in 4.5.2.1 and 4.5.2.2, respectively. test shall be cause for rejection. Failure of any 4.4 Quality conformance inspection. 4.4.1 Sampling. Sampling for examination and tests shall be in accordance with MIL-STD-105.
43、 4.4.2 Examination. Samples selected in accordance with 4.4.1 shall AQL shall be 1.5 percent defective be examined as specified in 4.5.1. for major defects and 4.0 percent defective for minor defects. 7 b I U Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
44、HS-,-,-GG-C-55OB c 4.4.3 Tests. Samples selected in accordance with 4.4.1 shall be tested as specified in 4.5.2.1 and 4.5.2.2. defective. AQL shall be 1.5 percent 4.5 Inspection procedure. 4.5.1“ Examination. The compass and case shall be examined as specified herein for the following defects: la j
45、or 101. 102. 103 104. 105. 106. 107. 108. 109. Minor 201. Matcrial not as speci.fi.ed. Dimensions not as specified. Pivot sleeve does not move freely or rotate about the pivot point. Socket does not accept and clamp the pen and pencil attachments. Pencil attachment does not accept and clamp leads. A
46、djusting screws do not operate smoothly. Compass and compass parts do not fit the case properly. Finishing not as specif ied. Workmanship not as specified. Identification marking not as specified. 4.5.2 Tests. 4.5.2.1 Compass. The compass shall be tested as specified in 4.5.2.1.1 and 4.5.2.1.2. 4.5.
47、2.1.1 Performance. The test shall be performed using the pen attachment with the compass. TT-1-528. and with diameters ranging between the maximum and minimum on either drawing paper conforming to UU-P-223, type I, class 1, or tracing cloth conforming to CCC-C-531, type I. Check the diameter of the
48、circles and the width and character of the drawn lines. Noncomformance to 3.4 and 3.9.2 shall constitute failure of this test. Fill the pen with ink conforming to Draw a number of circles with maximum and minimum diameters 8 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
49、t license from IHS-,-,-GG-C-5508 4.5.2.1.2 Hardness. The penpoints shall be tested in accordance with ASTM E 18. Nonconformance to the hardness specified in 3.9.2 shall constitute failure of this test. 4.5.2.2 Case. The case shall be tested as specified in 4.5.2.2.1 and 4.5.2.2.2. 4.5.2.2.1 Accelerated aging. The test shall be conducted in a temperature and humidity chamber. The case shall be subjected twice to each set of
