1、IINCH-POUND IA-A-5562931 JULY 1997SUPERSEDINGMS24679E15 MARCH 1990COMMERCIAL ITEM DESCRIPTIONNUT, PLAIN, CAP, LOW CROWNUNC-2B AND UNF-2BThe General Services Administration has authorized the use of this commercial item description for all federal agencies.1. = This Commercial Item Description (CID)
2、depicts the requirements for a UNC-2B and UNF-2B Low, Crown Cap, Plain Nut.2. Salient characteristics.2.1 Materials:2. I .I Steel, carbon, Types UNS (G1OO5O) thru (G104OO), (Gl 1160) thru (Gl 1370) or (G121 10) thru (G12144).2.1.2 Steel, corrosion resistant, Types UNS (3XXXX) series.2.1.3 Copper all
3、oys UNS (C23000) thru (C64600).2.1.4 Aluminum alloys UNS (A9201 7), (A96061 ), or (A96262)2.1.5 Nylon in accordance with ASTM D4066, Group 1, Class 1 or 2 color natural white.2.2 Protective finish:2.2.1 Carbon steel cap nuts shall be cadmium plate in accordance with QQ-P-4 16, Type II, Class 2.Cadmi
4、um plate cap nuts should be used only on aerospace applications. No additional codes required for part number.Zinc plate in accordance with ASTM B633 FE/ZN 5 Type II. Add letter “Z” to end of part number for zinc plate carbon steel cap nut.Nickel plate in accordance with QQ-N-290 Class 2. Add letter
5、 “N” to end of part number for nickel plate carbon steel cap nut.2.2.2 Steel, corrosion resistant cap nuts shall be cleaned, descaled and passivated in accordance with ASTM A967. No additional codes required forpart number.2.2.3 Copper alloy cap nuts shall be black oxide coated in accordance with MI
6、L-F-495. No additional codes required for part number.Nickel plate in accordance with QQ-N-290 Class 2. Add letter “N” to end of part number for nickel plate copper alloy cap nut.Plain cap nut with brite with no surface finish. Add letter “P” to end of part number.2.2.4 Aluminum alloy cap nut shall
7、be anodize in accordance with MIL-A-8625 Class 1. No additional codes required for part number.+H+F+ R.031BENEFICIAL COMMENTS, (RECOMMENDATIONS, ADDITION, DELETIONS, CLARIFICATIONS, ETC., AND DATA WHICHMAY IMPROVE THIS DOCUMENT SHOLUD BE SENT TO: DEFENSE INDUSTRIAL SUPPLY CENTER, ATTN: DISC-ECC, 700
8、ROBINS AVENUE, PHILADELPHIA, PA. 19111-5096.ASMC NIA 10F3 FSC 5310DISTRIBUTION STATEMENT A. APPROVED FOR PUBLIC RELEASE; DISTRIBUTION 1S UNLIMITED.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55629Table I. Dash numbersDash numbers Size Thread-
9、2BCarbon Cres Brass Nylon AluminumSteel1 21 411 511 611 .138 32UNC61 81 201 301 811 40UNF2 22 412 512 612 .164 32UNC62 82 202 302 812 36UNF3 23 413 513 613 .190 24UNC63 83 203 303 813 32UNF5 25 415 515 615 .250 20UNC65 85 205 305 815 28UNF6 26 416 516 616 .3125 18UNC66 86 206 306 816 24UNF7 27 417 5
10、17 617 .375 16UNC67 87 207 307 817 24UNF8 28 418 518 618 .4375 14UNC68 88 208 318 818 20UNF9 29 419 519 619 .500 13UNC69 89 209 309 819 20UNF10 30 420 520 620 .5625 12UNC70 90 210 320 820 10UNF11 31 421 521 621 .625 11UNC71 91 211 311 821 18UNF12 32 422 522 622 .750 10UNC72 92 212 312 822 16UNF13 33
11、 423 523 623 .875 9UNC73 93 213 323 823 14UNF14 34 424 524 624 1.000 8UNC74 94 214 314 824 12UNF15 35 425 525 625 1.125 7UNC75 95 215 325 825 12UNF16 36 426 526 626 1.250 7UNC76 96 216 316 826 12UNF2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A
12、-556293.3.13.24.4.14.24.34.44.5Oualitv Conformance Provisions.The suppliers shall be responsible for those in process controls and inspections necessary to supply aproductconsistently conforming to the requirements of this document.Upon request, the suppliers will certify with documented testlinspec
13、tion evidence, that the part supplied meets therequirements of this document.Notes:All dimensions are in inches, unless otherwise specifiedJ483.Interpret drawing in accordance with ASME Y14.5M.All dimensions and tolerances shall be in accordance with SAEPreservation, packing, and marking shall be as
14、 specified in the contractor order.Cap nuts manufactured prior to Commercial Item Description (CID) A-A-55629 are acceptable up to two years fromthe date on A-A-55629.The part identification number (PIN) shall consist of the basic CID number followed by a dash number from Table I,and a surface finis
15、h code when applicable.Example: AA55I 29- 1 ZIL Finish Code inapplicableDesignates dash numberCID numberDesignates a CIDA-A-55629- lZ indicates Nut, plain, cap, low crown, .138-32 UNC-2B thread, carbon steel, Zinc plated.Custodians:Air Force-99Army - ARNavy SHPreparing activity:DLA-IS(Project 53 10-2306-01)Review activities:Army - AV, ATNavy-AS, MC, OS,Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
