1、c -.a- Sb MIL-G-2767C 27 April 1983 SUPERSEDING MIL-G-2767B 1 May 1970 (See 6.4) MILITARY SPECIFICATION GUARDS, RAT, SHIP This spec Pication is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of rat guard to preven
2、t rats from boarding ships. 1.2 Classification. Rat guards shall be of the following sizes, as specified (see 6.2): 3-inch 5-inch 8-inch 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the
3、 issue listed in that issue of - the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-B-621 - Boxes, Wood, Nailed a
4、nd Lock-Corner. PPP-T-97 - Tape, Packaging/Industrial, Filament Reinforced. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy
5、, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 2040 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-27b7C 20 979990b 038324
6、8 L W MIL-G-2767C MILITARY MIL-C-52950- Crates, Wood, Open and Covered. STANDARDS MILITARY MIL-STD-129 - Marking for Shipment and Storage. (Copies of specifications and standards required by contractors, in connec- tion with specific acquisition functions should be obtained from the contracting acti
7、vity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this The issues of the documents specification to the extent specified herein. which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto
8、, if applicable. NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification (Application for copies should be addressed to the National Motor Freight Traffic Association, Inc., ATA TRAFFIC Dept., 1616 “P“ Street, NW, Washington, DC 20036 o) UNIFORM CLASSIFICATION C
9、OMMITTEE AGENT Uniform Freight Classification Ratings, Rules and Regulations (Application for copies should be addressed to the Uniform Classification Committee Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Industry association specifications and stand
10、ards are generally available They are also distributed among technical groups for reference from libraries. and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specifi- cation shall
11、take precedence. 3 REQUIREMENTS 3.1 Materials. Rat guards shall be galvanized sheet steel (galvanize coating 1-m per square foot), or sheet aluminum alloy 6061-T6 or 5052-H32 as specified (see 6.2). Rat guards shall conform to figure 1 and shall consist of a disc and a tapered sleeve. half shall be
12、provided with a “U“ shaped guide. 3.1.1 Steel rat guards. When the guard is made of steel sheets, gal- Both halves shall be identical, except one vanized, the guide and sleeve shall be riveted and soldered to the disc with tinners type rivets, number 3, 0.160 inch diameter. i Provided by IHSNot for
13、ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-2767C 3.1.2 Aluminum rat guards. When the guard is made of aluminum sheets, the sleeve and guide shall be spot welded and riveted to the disc. Spot welds not to exceed 2-inch spacing, and the minimum number of 4 spots o
14、n each half shall be required. diameter. Five rivets shall be installed in each half of the guard, evenly spaced between spot welds. The rivets shall be equivalent to number 3, 0.160 inch 3.1.3 Hinge bolt. Each guard shall be provided with a 1/4-20 UNC, hexa- gon head bolt, nut and washer. .For stee
15、l guards, these parts shall be steel galvanized. For aluminum guards, these parts shall be corrosion-resistant steel. 3.1.4 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered by this spec- ification shall be new and sh
16、all be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as
17、opposed to virgin raw materials. interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. None of the above shall be 3.2 Dimensions. Rat guards shall conform to the dimensions as specified in table I and as specified on
18、 figure 1 (see 6.2). 3.3 Sleeve. The metal sleeve shall be slotted as specified in table I and as specified on figure 1, so that when the rat guard is in place, it may be drawn tightly against the hawser, with lashing. be tapered to permit nesting of the complete rat guards, for compact shipping. Th
19、e formed sleeve shall Dimensions (see figure 1) A B inches inches Size 3 3 36 5 5 48 8 8 48 TABLE I. Dimensions. Thickness of disc, Number of sleeve, and guide prongs in complet e Steel, galvanized Aluminum sleeve sheet gage B and S gage 6 18 (0.0516 inch) 16 (0.0508 inch) 10 18 (0.0516 inch) 16 (0.
20、0508 inch) 16 18 (0.0516 inch) 16 (0.0508 inch) 3.4 Identification. Rat guards shall be marked for identification and identification marking shall include the following: (a) Size. (b) National stock number. 3.4.1 Method of identification. Identification marking shall be stenciled with black paint an
21、d letters shall be approximately 1-inch high. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-27b7C 20 9 7777406 0383250 T W I Number of I rat guards in lot MIL+-2767C Number of rat guards in sample 3.5 Workmanship. Workmanship shall be of th
22、e highest quality throughout and in conformance with accepted commercial standard practice for this type of equipment. Acceptance number (defective) 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibiliy for inspection. Unless otherwise specified in the contract or purchase order, the contractor is respo
23、nsible for the performance of all inspection requirement6 as specified herein. fied in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Govern
24、ment 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 speci- 4.2 Sampling. 4.2.1 Lot. Rat guards of the same size shall be considered
25、 a lot. - 4.2.2 Sampling for examination and trial assembly. A random sample of rat guards shall be selected in accordance with table II for the examination specked in 4.3 and the trial assembly specified in 4.4. dehctive rat guards in any sample exceeds the acceptance number specified in table II,
26、it shall be cause for rejection of the lot. applied separately to major and minor defects for purpose of lot acceptance and rejection. If the number of Table XI shall be TABLE II. Sampling for examination and trial assembly. 25 and under 26 to 40 41 to 65 66 to 110 111 to 300 301 to 800 5 7 10 15 25
27、 35 Rejection number (defective) 4.3 Examination. Rat guards selected in accordance with 4.2.2, shall be examined as specified in table III and measured to verify conformance to the requirements of this specification. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
28、ense from IHS-,-,-Categories Cri tical : Major : 10 1 102 103 104 105 106 107 Minor : - 201 202 203 204 MIL-G-2767C TABLE III. Classification of defects. Defects None defined At trial assembly (see 4.4) guard does not fit Guard does not maintain a secure and correct posi- Thickness of material not a
29、s specified (see table I). Sleeves not tapered to allow for nesting closely for Sleeve, guide not properly assembled as specified in Disc is warped. Galvanizing is less than 1.15 ounces per square foot. properly over specified hawser size. tion when lashed to the hawser (see figure 1). shipment (see
30、 3.3). 3.1.1 and 3.1.2. Dimensions do not conform to figure 1. Bolt, nut and washer not as specified in 3.1.3. Outside edges of disc sharp or inside of sleeve rough. Galvanizing not uniform. 4.4 Trial assembly. Rat guards selected in accordance with 4.2.2 shall be assembled on the specified dimensio
31、nal size to verify conformance with the functional requirements of this specification. 4.5 Inspection of packaging. Sample packages and packs, and the inspec- tion of the preservation-packaging, packing and marking for shipment and storage shall be in accordance with the requirements of section 5 an
32、d the documents specified therein. 5. PACKAGING (The preparation for delivery requirements specified herein apply only for direct Government acquisition. preparation for delivery requirements of reference documents listed in section 2, see 6.3). For the extent of applicability of the 5.1 Preservatio
33、n. Preservation shall be level A or C, as specified (see 6.2). 5.1.1 Level A. 5.1.1.1 Preservative applications. Preservatives shall not be used. 5 . i -Ic - - . - r % Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-G-Zb7C 20 06 0383252 3 W MIL-G
34、-2767C 5,1,1,2 Unit packs, Eight complete rat guards shall be nested together by disassembling each guard and securing the two halves together at the funnel with filament reinforced pressure sensitive tape conforming to PPP-T-97. The hinge bolt, nut and washer for each guard shall be secured to one
35、half of the guard in a manner to prevent loss or damage. 5.1.2 Level C, Rat guards, assembled or disassembled at the contractors option, shall be unit packed in a manner to afford protection against damage during shipment from the supply source to the first using activity for immediate use. The cont
36、ractors retail or wholesale preservation methods may be used when such meets the requirements of this level, 5.2 Packing, 5.2.1 Level A, Packing shall be level A, B or C as specified (see 6.2). Eight disassembled rat guards unit packed as specified in 5.1 shall be packed ip wood cleated plywood, nai
37、led wood or open wood crates conforming to PPP-B-601 overseas type, PPP-B-621 class 2 or MIL-C-52950 boxes or crates respectively, Selection of the box or crate shall be at the option of the contractorr Protection to tapered funnels shall be provided by means of blocking, bracing or cushioning or ot
38、her media to prevent damage during handling, shipment and storage, Shrouds are not required. 5.2.2 Level B. Eight disassembled rat guards unit packed as specified in 5.1 shall be packed as specified in 5.2.1, except that containers shall conform to the domestic class or grade of the type used. 5.2.3
39、 Level C. Packing shall be accomplished in a manner which will insure acceptance by common carrier at the lowest rate and will afford protec- tion against physical.or mechanical damage during direct shipment from the supply source to the using activity for early installation. The shipping containers
40、 or method of packing shall conform to the Uniform Freight Classifi- cation Rules, National Motor Freight Classification, or other carrier regula- tions, as applicable to the mode of transportation. 5.3 Marking. In addition to any special marking required (see 6.2), unit packs and shipping container
41、s shall be marked in accordance with MIL-STD-129. Unit packs in open crates may be marked with waterproof tags, 60 NOTES 6.1 Intended use. The type-of rat guard covered in this specification is intended to prevent rats from boarding ships. 6.2 Ordering data. Acquisition documents should specify the
42、following: (a) (b) Size required (see 1.2). (c) Material required (see 3#1). (d) Dimensions (see 3.2). (e) (f) Title, number, and date of this specification, Level of preservation and packing (see 5.1 and 5.2). Special marking required (see 5.3). 6 Provided by IHSNot for ResaleNo reproduction or net
43、working permitted without license from IHS-,-,-MIL-G-2767C 20 m 9999906 0383253 5 m MIL-G-2767C 5.2. 6.3 Sub-contracted material and parts. The preparation for delivery requirements of referenced documents listed in section 2 do not apply when material and parts are acquired by the contractor for in
44、corporation into the equipment and lose their separate identity when the equipment is shipped. 6.4 Changes from previous issue. Asterisks are not used in this revision to identify changes with respect to the previous issue, due to the extensive- ness of the changes. Custodians: Army - ME Navy - SH P
45、reparing activity: Navy - SH (Project 2040-0149) 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RAT WAR0 INSTALLED IN THIS MANNER TO PAEVENT RATS CRM WARDIN6 SMIC, METH OFSEGURINO RAT GUARD TO HAWCER. SOLDER INSIDE AH0 WTSIDE COCITINUOUS OH GALV.
46、STEEL SHEET. SPOT WELD AND RIVET OH ALUMINUM SMET. 4 SPOT WELDS N EACH HALF NOT TO EXCEED 2 IN. SPMIIWOI 3 RIVETS ALF EWEEN SPOT WELDS. SLEEVE, TACEMD (AU AROUNO) TO PERMIT NESTING FOR SHICMENT 4 RIVETS to EAffl HALF. QKV, SEEL DIA STEEL (ax, wo) WLT,MUT AND WASHER QALV. FOR GALV. STEL SHEET. FIGURE 1. Assembly of rat guards. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
