1、YLL-R- 12 22 1D (ME ) 25 February 1985 SUPERSEDING MIL-R- 12 2 2 1 C (ME ) 11 December 1975 Beneficial comments (recommendations, additions, deletions) and any pertinent 1 data which may be of use in improving this document should be addressed to: Belvoir Research and Development Center, ATTN: STRBE
2、-DS, Fort Belvoir, VA 22060-5606 by using the self-addressed Standardization Document Improvement ,Proposal (DD Form 1426) appearing at the end of this document or by letter. USA MILITARY SPECIFICATION RIVETS, SOLID: ALUMINUM ALLOY 7277 This specification is approved for use by the USA Belvoir Resea
3、rch and Development Center, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers 7277 aluminum alloy rivets for structural use. temperatures between 850“ F and 975 F. Rivets of this composition ar
4、e to be hot driven only at 1.2 Classification. The rivets shall be of the following types, as specified (see 6.2): Type B-2 - High buttonhead. Type 3 - Roundhead. Qpe 6 - Buttonhead. Type 7 - Flat-top countersunk head. Type 8 - Round-top countersunk head. 2. APPLICABLE DOCUMENTS 2.1 Government docum
5、ents. 2.1.1 Specifications and standards. The following documents of the issue in effect on date of invitation for bids or request for proposal form a part of this specification to the extent specified herein: FSC 5320 K THIS DOCUMENT CONTAINS - $- PAGES Provided by IHSNot for ResaleNo reproduction
6、or networking permitted without license from IHS-,-,-MIL-R-L222LD 53 W 7779706 01iOOL82 O MIL-R-12 22 1 D (ME ) I SPECIFICATIONS FEDEKAL PPP-Ii-1581 STANDARDS FEDEKAL FED-STD-151 MILITARY MIL-STD-105 MIL-STD-129 - Hardware (Fasteners and Related items) Packaging of. - Metals: Test Methods. - Samplin
7、g Procedures and Tables for Inspection by Attributes. - Marking for Shipment and Storage. (Copies of specifications, standards, and drawings required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting of
8、ficer.) 2.2 Other publications. The following document(s) form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. AMERICAN SOCIETY FOR T
9、ESTING AND MATERIALS (ASTM) B 557 - Tension Testing Wrought and Cast Aluminum and Magnesium-Alloy B 565 - Shear Testing of Aluminum and Aluminum-Alloy Rivets and D 3951 - Standard Practices for Commercial Packaging. Product s. Cold-Heading Wires and Rods. I 3. REQUIREMENTS 3.1 Description. Rivets sh
10、all conform to the dimensions and types shown in figure 1 and as specified herein. 3.2 Material. Rivets shall be fabricated from 7277-H13 aluminum alloy rod. The rod shall conform to the chemical composition shown in table I and shall have an ultimate tensile strength of 36,000 - 46,000 psi. 2 Provi
11、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-1222LD 53 777770b OlOO183 2 I Diameter in Inches ( inc ius ive 1 TABLE I. Chemical Composition for Aluminum Alloyl/ (7277) Tolerance in Inches (minus 1 (plus) Element 112 to 518 11116 to 718 15/16 to 1
12、-114 Copper Magnesium Chromium Si 1 icon Titanium Iron Zinc Other elements, each Other elements, total21 Aluminum Percent 0.8 - 1.7 1.7 - 2.3 0.18 - 0.35 0.50 (max.1 0.10 (max.) 0.7 (max.) 3.7 - 4.3 0.05 (max.) 0.15 (max.) Remainder - l/ - 2/ Except for “Aluminum“ and “Others“, analysis nonnally is
13、made for elements for which specific limits are shown. The sum of those “Others“ metallic elements 0.010 percent or more each, expressed to the second decimal before determining the sum. 3.3 Dimensions. 3.3.1 Diameter of rivet shank. The diameter of the rivet shank shall be as specified (see 6.2) an
14、d shall not deviate from the specified diameter by an amount greater than the tolerances shown in table II. TABLE II. Shank Diameter Tolerances. O. 007 0.010 o. O09 0.012 (as specified, see 6.2) 3.3.2 Diameter of rivet head. The diameter of the rivet head shall not deviate from the nominal diameter
15、shown in figure 1 by an amount greater than 210 percent in rivet sizes up through 718 inch shank diameter. larger size rivets shall be as specified (see 6.2). Tolerances for 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-R-1222LD 53 W 7977706
16、 01001811 L1 W MIL-R-12221D (ME) 3.3.3 Thickness or depth of rivet head. For rivets up through 7/8 inch shank diameter, the tolerances shall be 28 percent of the nominal head thickness or depth, excluding height of marking, with a minimum tolerance of 0.008 inch. Tolerances for larger size rivets sh
17、all be as specified (see 6.2). 3.3.4 Length of rivets. The length of rivets shall be as specified (see 6.2). surface of the head. The length of rivets shall not deviate from the specified length by more than 21/64 inch in rivet sizes up through 7/8 inch shank diameter. Length tolerances for larger s
18、ize rivets shall be as specified (see 6.2). The length shall be measured from the largest diameter of the bearing 3.3.5 Roundness and concentricity. Rivet heads shall not deviate from true roundness and concentricity with the shank by an amount greater than the tolerance specified for the correspond
19、ing rivet shank diameter shown in table II. 3.4 Mechanical properties. 3.4.1. Tensile strength. When heat treated to the T62 temper (see 6.3 and 6.41, rivets shall have a minimum tensile strength of 60.0 thousand pounds per square inch (ksi). 3.4.2 Shear strength. When heat treated to the T62 temper
20、 (see 6.3 and 6.41, rivets shall have a minimum shear strength of 35.0 (ksi). 3.5 Identification marking. The rivets shall be identified by a raised numeral “7“ on the end of the rivet shank or on the rivet head. 3.6 Workmanship. The rivets shall be of uniform quality, free from flash, seams, clinch
21、 or die marks, cracks, or other injurious defects. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements specified herein. the contract or order
22、, 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 Government reserves the right to perform any of the inspections set forth in the specification where such inspections are d
23、eemed necessary to assure supplies and services confom to prescribed requirements. Except as otherwise specified in 4.2 Classification of inspections. Inspections shall be classified as follows: a. b. Quality conformance inspection (see 4.3). Inspection of packaging (see 4.5). 4.3 Quality conformanc
24、e inspection. 4 -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-,MIL-R-L222LD 53 W 7777qOb OLOOL85 b W MIL-R-l2221D(ME) 4.3.1 Examination. 4.3.1.1 Sampling. Sampling for examination shall be in accordance with MIL-STD-105, Inspection level S-3. 4.
25、3.1.2 Samples. Samples selected in accordance with 4.3.1.1 shall be examined for the defects specified in 4.4.1. AQL shall be 4.0 percent defective. 4.3.2 Tests. 4.3.2.1 Sampling. Sampling for each test shall consist of one rivet, or a specimen of the full section of material from which the rivets w
26、ere made, taken from any lot of 500 pounds or less; for larger lots, an additional sample for each test shall be taken for 1000 pounds or fraction thereof, in excess of the first 500 pounds. s 4.3.2.2 Samples. Samples selected in accordance with 4.3.2.1 shall be solution heat treated with the rivets
27、 it represents. The samples shall be artificially aged to the T62 temper (see 6.3) and tested as specified in 4.4.2. Failure of any test shall be cause for rejection. 4.4 Inspection procedure. 4.4.1 Examination. The rivet shall be examined as specified herein for the following defects. Major 101. 10
28、2. 103. 104 105. 106. 107. 108. 109. Material not as specified. Dimensions not as specified. Roundness and concentricity of the rivet head not as specified. Identification marking not as specified. Workmanship not as specified. Diameter of rivet shank not as specified. Diameter of rivet head not as
29、specified. Thickness or depth of rivet head not as specified. Length of rivets not as specified. 4.4.2 Tests. 4.4.2.1 Tensile test. The tensile test specimens shall be tested in When practical, the material shall be tested in accordance with ASTM B 557. full section. the standard round type specimen
30、 in the largest size applicable shall be used. For material which cannot practically be tested in full section, 4.4.2.1.1 Tensile test specimen. If the tensile test specimen is a section of the material from which the rivets are made, it shall be heat treated to the T42 temper with the rivets it rep
31、resents (see 6.3). In addition, whether the specimen is a rivet or a section of the material, the final test specimen shall 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-12221D 53 m 9777706 OLOOLb B m MIL-R-l222lD(ME) be heat treated to the
32、 T62 temper (see 6.3). If the test jigs are not available to use with a full section of the rivet or material, small size specimens proportional to the standard specimen may be used. 4.4.2.2 Shear test. The shear test specimens shall be tested in accordance The shear strength shall be calcu- with AS
33、TM B 565. diameter to accomodate the test apparatus. lated using the actual measured diameter of the test specimen. The shear test specimen may be turned down to 0.372 inch in 4.5 Material inspection. Materials inspection shall consist of reviewing the mill certification and verifying data that the
34、material used in fabricating the rivets is in accordance with 3.2. Mill certification on all material shall be kept on file and available for inspection by the procuring activity at the producing facility. 4.6 Inspection of packaging. The preservation, packing, and marking of the rivets for level A
35、or B shall be examined and tested in accordance with the quality assurance provisions of PPP-H-1581. and marking shall be examined to determine compliance with ASTM D 3951. Commercial preservation, packing 5. PACKAGING 5.1 Preservation. Preservation shall be level A, level B, or commercial as specif
36、ied (see 6.2). 5.1.1 Level A. The rivets shall be preserved in accordance with the level A requirements of PPP-H-1581. 5.1.2 Level B. The rivets shall be preserved in accordance with the level B requirements of PPP-H-1581. 5.1.3 Commercial. The rivets shall be preserved in accordance with ASTM D 395
37、1. 5.2 Packing. Packing shall be level A, level B, or commercial as specified (see 6.2). 5.2.1 Level A. Rivets, preserved as specified in 5.1, shall be packed in accordance with the level A requirements of PPP-H-1581. 5.2.2 Level B. Rivets, preserved as specified in 5.1, shall be packed in accordanc
38、e with the level B requirements of PPP-H-1581. 5.2.3 Commercial. Rivets, preserved as specified in 5.1, shall be packed in accordance with ASTM D 3951. 5.3 Marking. 5.3.1 Military. Marking for military levels of protection (level A or B) shall be in accordance with MIL-STD-129. 6 Provided by IHSNot
39、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-12 221 D (ME 5.3.2 Commercial. Marking for commercial packaging shall be in accordance with ASTM D 3951. 6. NOTES 6.1 Intended use. The rivets are intended for use as fasteners in structures. 6.2 Ordering data. Proc
40、urement documents should specify the following: a. be C. d. e. f. g* he i. Title, number, and date of this specification. Type of rivet required (see 1.2). Diameter of rivet shank required (see 3.3.1). Shank diameter tolerances for rivets of 15/16 to 1-1/4 inch diameter (see table 11). Head diameter
41、 tolerances for rivets larger than 7/8 inch shank diameter (see 3.3.2). Head thickness tolerances for rivets larger then 7/8 inch shank diameter (see 3.3.3). Length of rivet required (see 3.3.4). Length tolerances for rivets larger than 7/8 inch shank diameter (see 3.3.4). Degree of preservation and
42、 degree of packing required (see 5.1 and 5.2). 6.3 Recommended heat-treatment practice. To produce the T42 temper, (for 7277 rivets) the solution heat-treatment temperature should be 860 F to 920“ F for approximately 30 minutes. To produce the T62 temper, the solution heat- treated material should b
43、e artificially aged for 4 hours at 210“ F - +lo F, and then aged for 8 hours at 315“ F - +loo F 6.4 Caution to designers. Do not use T62 properties for design purposes. Since 7277 rivets are not used in the artificially aged condition, T62 properties are not applicable. appreciably Lower than stated
44、 in 3.4.1 and 3.4.2. Tensile strength and shear strength will be Custodian : Army - ME Review activity: DLA - IS U.S. GOVERNMENT PRINTING OFFICE, 198-SOS-O38/P1346 7 i Preparing activity: Army - ME Project 5320-AO09 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
45、 from IHS-,-,-R- I MIL-R-12221D 53 M 999790b OLOOL L W TIIL-R- 12 22 1D (ME) C=.75D R= ID42 D HIGH BUTTONWAD TYPE 8-2 DIMENSIONS - HIGH BUTTONHEAD D AH FI G MIN DIA. DIA HEIGHT RADII HEAD of OF OF OF RADIUS BODY HEAD HEAD HEAD CENTERS INCHES INCHES INCHES INCHES IINCHES INCHES 1 INCHES 10.500 10.781
46、 I0.500 la656 10.094 l0.517 10.093 I I I 11.125 11.719 10.969 11.125 0.5630.5000.093 I 11.250 I i.906I 1.063 11.219 10.6561 0.500I0.093 I Ltii 4DC- RO U N DHEA FLAT-TOPCOUNTERSUNK ROUND-TOP COUNTERSUNK HEAD HEAD TYPE 3 TYPE 7 TYPE 8 RI MAXIMUM NOT TO INTERFERE WITH PROPER HEADINQ;MINIMUL., 0.0 BUTTONHEAD TYPE 6 NCH FIGURE I. ALUMINUM RIVETS 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
