1、i. o S MIL-P-SOLP 83 m 9999906 0469007 7 m c 1 INCH-POUND I MIL-P-501P 1 March 1991 SUPERSEDING MIL-P-501N 25 November 1987 MILITARY SPECIFICATION PIN, TENT, METAL This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specificat
2、ion covers metal tent pins (see 6.1). 1.2 Classification. The tent pins shall be of the following types and classes as specified (see 6.2). Type 1 - Aluminum, 9-inch Type II - Steel, 12-inch Class A - Arctic soil Class B - Hard soil Type III - Steel, 18-inch 2. APPLICABLE DOCUMENTS 2.1 Government do
3、cuments. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks 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 S
4、pecifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Beneficial comments (recommendations, additions, deletions). and any pertinent data which may be used in improving this document should be“addressed to: U.S. Army Natick Research, Development, and Engin
5、eering Center, Natick, MA 01760-5017 by using the Standardization Document Improvement Proposal (DD Fon 1426) appearing at the end of this document or by letter. Licensed by Information Handling ServicesSPECIFICATIONS FEDERAL QQ-A-2 50 I4 - Aluminum Alloy 2024, Plate and Sheet TT-C-490 - Cleaning Me
6、thods for Ferrous Surfaces and TT-E-489 - Enamel, Alkyd, Gloss, Low VOC Content TT-L-32 - Lacquer, Cellulose Nitrate, Gloss for Aircraft Use Pretreatments for Organic Coatings PPP-B-621 - Boxes, Wood, Nailed and Lock-Corner PPP-B-63 6 - Boxes, Shipping, Fiberboard PPP-B-640 - Boxes, Fiberboard, Corr
7、ugated, Triple-Wall MILITARY MIL-L-35078 - Loads, Unit: Preparation of Semiperishable Subsistence Items; Clothing, Personal Equipment and Equipage; General Specification For STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Stora
8、ge MIL-STD-130 - Identification Marking of U.S. Military Property MIL-STD-147 - Palletized Unit Loads 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
9、Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicita
10、tion. DRAWINGS U.S. ARMY NATICK RESEARCH, DEVELOPMENT, AND ENGINEERING CENTER 5-4-121 - Pins, Tent, Metal; Type I, Aluminum, 9 inch 5-4-196 - Pins, Tent, Metal; Steel ls-inch, Type-III, for 5-4-791 - Pins, Tent, Metal; Steel 12 inch, Type II, Class A Temperate Climate Soils for Arctic Soil and Class
11、 B for Hard Soil 2 Licensed by Information Handling ServicesMIL-P-501P (Copies of drawings are available from the U.S. Army Natick Research, Development, and Engineering Center, ATTN: STRNC-UX, Natick, MA 01760-5017.) 2.2 Non-Government publications. The following documents form a part of this “docu
12、ment to the extent specified herein. Unless otherwise specified, the issues of“t-he,. 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 the,issues of the documents ci
13、ted in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 322 - Steel Bars, Alloy, Standard Grades A 576 - Steel Bars, Carbon, Hot-Wrought, Special Quality B 209 - Aluminum and Aluminum-Alloy Sheet and Plate B 449 - Chromate Treatments On Aluminum D 3951 - Standard Pract
14、ice for Commercial Packaging E 18 - Rockwell Hardness and Rockwell Superficial Hardness of E 381 - Microetch Testing, Inspection, and Rating Steel Metallic Materials Products, Comprising Bars, Billets, Blooms, and Forgings (Copies may be obtained from the American Society for Testing and Materials,
15、1916 Race Street, PA 19103-1187.) (Non-Government standards and other p blications are normally available from the organizations that prepare or distri Y, ute the documents. These documents also may be available in or through.libraries or other informational services.) 2.3 Order of precedence. In th
16、e 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, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When sp
17、ecified (see 6.21, a sample shall be subjected to first article inspection (see 6.31, in accordance with 4.3. 3.2 Material. The material shall conform to the applicable reference documents specified herein, (see 6.4). It is encouraged that recycled material be used when practical as long as if meets
18、 the requirements of this specification. 3.2.1 Aluminum alloy. Aluminum alloy sheet shall conform to alloy 2024-0 of QQ-A-250/4, or ASTM B 209 and heat treated to temper T42 after forming. 3 Licensed by Information Handling Services-. MIL-P-501 P 3.2.2 Steel alloy bar. Steel alloy bar shall conform
19、to the hot rolled condition (HR), composition 4140 of ASTM A 322 for the type II pin and composition 1040 of ASTM A 576 for the Type III pin. 3.2.3 Lacquer. Lacquer shall conform to either type 1 or 2, International Orange color No. 12197, Insignia Red color No. 11136 or Insignia White color No. 178
20、75, as applicable, of TT-L-32. 3.2.4 Enamel. Enamel shall conform to class A or B, composition G or L, International Orange color Nos. 12197-1 or 12197-2, Red color Nos. 11136 or 11105, or White color Nos. 37875 or 37886, as applicable, of TT-E-489. 3.3 Construction. The construction of the pins sha
21、ll conform to Drawings 5-4-121, 5-4-196 and 5-4-791, and as specified herein. 3.3.1 Type I pin. The type I pins shall be fabricated of aluminum specified in 3.2.1. After stamping but prior to forming, the blank shall conform to the dimensions shown on Drawing 5-4-121. After forming, the pin shall be
22、 heat treated-as required by QQ-A-25014 or ASTM B 209, except that each batch of heat treated pins shall be tested as specified in 4.4.2.3 for a minimum hardness of 61 on the Rockwell 30T scale in lieu of the tensile strength, yield strength, and elongation tests. 3.3.2 Type II pin. The type II pins
23、 shall be fabricated of steel specified in 3.2.2. The head portion or the complete type II pin shall be shaped by forging. The type II pin shall be air cooled after forging. The forging shall be free from any crack, seam, or lap when tested as specified in 4.4.5. Forge welding operation shall not be
24、 permitted. The center line axis of the finished type II pin shall not bow out of line more than 3/64 inch. After forging and air cooling, the pin shall be heat treated to a Rockwell C40-48 hardness at all depths when tested as specified in 4.4.5. 3.3.3 Type III pins. The type III pins shall be fabr
25、icated from steel specified in 3.2.2. The head of the pin or the complete pin shall be shaped by forging. The forging shall-be free from any crack, seam or lap when tested as specified in 4.4.5. Parting lines shall be trimmed smooth and resultant flat trim line shall have rounded edgqs. 3.4 Identifi
26、cation marking. Prior to finishing, pins shall be permanently and legibly marked with the letters “US“ and the manufacturers identification in accordance with MIL-STD-130 in the locations as shown on the applicable drawings referenced in section 2. The type II pin shall also be permanently and legib
27、ly marked with the alloy Number “4140“ with raised or stamped marking. 4 Licensed by Information Handling ServicesMIL-P-501 P 3.5 Finish. All grinding, machining, removing of burrs, sharp edges and corners, trimming of forged parting lines, and marking operations shall be completed prior to finishin
28、g. 3.5.1 Pretreatment. 3.5.1.1 Type I pin. Prior to lacquering or enameling, the type I pin shall be prepared for painting in accordance with class 1 or 2 requirements of ASTM B 449. 3.5.1.2 Type II and Type III pins. Prior to lacquering or enameling, the type II and type III pins shall be cleaned a
29、nd treated by- any method or type in accordance with TT-C-490, except that the testing for salt spray resistance shall not be required. 3.5.2 Lacquering or enameling. After pretreatment, the pins shall be coated with lacquer or enamel as specified in 3.2.3 or 3.2.4. The coating shall be a smooth, un
30、iform dry film without areas of thin or no film, rust, corrosion, blisters, peels, cracks, sags, or soft runs. The color of the finish shall be orange for type I pin, red for the type II class A and type III pins, or white for the Type II class B pins. 3.6 Workmanship. The finished pins shall not be
31、 bent out of shape, twisted, fractured, or malformed. The pins shall be free from cracks and flares. Type I pins shall be free from any die mark, tool mark, and forming mark exceeding 1/32 inch in depth. Type II and type III pins shall be free from loose scale or scale pits exceeding 1/32 inch in de
32、pth. The finished pins shall conform to the quality of product established by this specification and the occurrence of defects shall not exceed the applicable acceptable levels. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase
33、order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection
34、 requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 5 Licensed by Info
35、rmation Handling ServicesMIL-P-501 P 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The. absence of any inspection requ
36、irements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice
37、to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.1.2 Responsibility for dimensional requirements. Unless otherwise specified in the contract
38、 or purchase order, the contractor is responsible for ensuring that all specified dimensions have been met. When dimensions cannot be examined on the end item, inspection shall be made at any point, or at all points in the manufacturing process necessary to ensure compliance with all dimensional req
39、uirements. 4.2 Classification of inspections. The inspection requirements speciied herein are classified as follows: a. First article inspection (see 4.3) b. Quality conformance inspection (see 4.4) 4.3 First article inspection. When a first article is required (see 3.1 and 6.2), it shall be examine
40、d for the defects specified in 4.4.3 and 4.4.4 and shall be tested or the charactertistics specified in 4.4.5. Any nonconformance shall be cause for rejection of the first article. 4.4 Quality conformance inspection. Unless otherwise specified, sampling for inspection shall be performed in accordanc
41、e with MIL-STD-105. 4.4.1 Component and material inspection. In accordance with 4.1, components and materials shall be inspected in accordance with all the requirements of referenced documents unless otherwise excluded, amended, modified, or qualiied in this specification or applicable purchase docu
42、ment. 4.4.2 In-process inspection. Inspection of subassemblies shall be made to ascertain that construction details which cannot be examined in the finished product are in accordance with specified requirements. The Government reserves the right to exclude from consideration for acceptance, any mate
43、rial or service for which in-process inspection has indicated nonconformance. 4.4.2.1 In-process dimensional examination. An in-process dimensional examination shall be made of type I pin blanks to determine compliance with 3.3.1. Any dimension that is not within the specified requirements shall be
44、6 Licensed by Information Handling Servicesclassified a defect. The lot shall be type I pin blanks. The sample unit shall be one type I pin blank. The inspection level shall be S-2 and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 4.0. 4.4.2.2 In-proce
45、ss examination. Examination shall be made of the fabrication processes in table I to establish conformance with specified requirements. Whenever nonconformance is noted, correction shall be made to the process and all items processed. Items which cannot be corrected shall be removed from production.
46、 TABLE I. In-process examination Requirement or operation Requirement reference Type I pin is heat treated prior to pretreatment 3.3.1 Head portion or complete type II and type III pins shaped by forging 3.3.2 and 3.3.3 Type II pin is air cooled after forging 3.3.2 Forge welding operation shall not
47、be permitted 3.3.2 Type II pin is heat treated prior to pretreatment Grinding, machining, removing of burrs, sharp edges 3.3.2 3.5 and corners, trimming of forged parting lines, and marking is completed prior to finishing Type I pin is prepared for painting prior to finishing 3.5.1.1 Type II and typ
48、e III pins are cleaned and treated prior to 3.5.1.2 finishing 4.4.2.3 In-process testing. Prior to finishing of the type I pins, testing shall be performed in accordance with ASTM E 18 to determine compliance with 3.3.1. The lot shall be all of the pins in each batch of the heat treated type I pins.
49、 The sample unit shall be one pin. The inspection level shall be S-1 and the AQL, expressed in terms of defects per hundred units, shall be 6.5. Three determinations shall be made on each sample unit and the hardness shall be reported as the average of the three readings to the nearest appropriate Rockwell scale value. Any sample failing to meet the minimum of 61 Rockwell hardness on the 30T scale specified in 3.3.1 shall be classified a defect. 7 Licensed by Information Handling Services MIL-P-5OLP 83 W 9999906 0469034 4 W MIL-P-501 P 4.4.3 End item visual examination. The end items
