1、A-A-5562411 March 1997SUPERSEDINGMS18212D7 January 1994COMMERCIAL ITEM DESCRIPTIONSCREW, MACHINE, PAN HEAD, SLOTTED,PLASTIC (NYLON), UNC-2AThe General Services Administration has authorized the use of this Commercial Item Description for allFederal Agencies.1. Scope. This Commercial Item Description
2、 (CID) depicts the requirements for UNC-2A thread, plastic-nylon, slotted, pan head machine screws.2. Salient characteristics.2.1 Material shall be plastic-nylon in accordance with ASTM D4066, Group 01, Class 1, Grade 1.2.2 Threads shall be in accordance with ASME B1.1. Acceptable screw threads are
3、those which can bethreaded by hand with a nut to at least two fully formed threads closest to the screws head. The nut shall befully ferrous, hexagon type, UNC-2B, conforming dimensionally to ASME B18.6.3.2.3 Screws up to and including 2.000 inches in length shall have full form threads extending to
4、 within twothreads of the bearing surface of the head or closer if practicable. Screws over 2.000 inches in length shallhave a minimum full form thread length of 1.750 inch.2.4 All tolerances, unless otherwise specified, shall be .005 for 3 place decimals.BENEFICIAL COMMENTS, (RECOMMENDATIONS, ADDIT
5、IONS, DELETIONS, CLARIFICATIONS, ETC., AND DATAWHICH MAY IMPROVE THIS DOCUMENT SHOULD BE SENT TO: DEFENSE INDUSTRIAL SUPPLY CENTER, ATTN:DISC-ECC, 700 ROBBINS AVENUE, PHILADELPHIA, PA. 19111-5096.ASMC N/A 1 OF 4 FSC 5305DISTRIBUTION STATEMENT A. APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED
6、.INCH-POUNDProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-556242TABLE I. DASH NUMBERS AND DIMENSIONSNOMINAL SIZE .086 (NO.2) .112 (NO.4) .138 (NO.6) .164 (NO.8) .190 (N0.10) .250 (1/4) .375 (3/8)THREAD CLASS 56 UNC-2A 40 UNC-2A 32 UNC-2A 32 UNC-
7、2A 24 UNC-2A 20 UNC-2A 16 UNC-2AA HEAD .160 .210 .265 .320 .365 .475 .740H HEAD HEIGHT .050 .065 .075 .080 .110 .160 .212J SLOT WIDTH .028 .035 .045 .050 .055 .070 .088T SLOT DEPTH .025 .035 .045 .050 .060 .085 .112R HEAD RADIUS MAX .035 .042 .046 .052 .061 .087 .143LLENGTH TOL DASH NUMBERS.125.188.
8、250.312.375.438.500.625.750.8751.0001.1251.2501.5001.7502.0002.2502.5002.7503.000.01512345678910*21222324252627282930*3132333441*4243444546474849505152535455566162*6364656667686970*7172737475767778*79*80*8283848586*87888990*919293949596979899*100*104105106*107108109110*111112113114115116117118119*12
9、0125127128129131132133134135136138140*- INACTIVE FOR NEW DESIGNProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5562433. Quality Conformance Provisions.3.1 The suppliers shall be responsible for those in process controls and inspections necessary
10、to supplya product consistently conforming to the requirements of this document.3.2 Upon request, the suppliers will certify with documented test/inspection evidence, that the partsupplied meets the requirements of this document.4. Notes:4.1 All dimensions are in inches.4.2 Interpret drawing in acco
11、rdance with ASME Y14.5M.4.3 The gate vestige shall be limited to .025 max and shall not be included in any tolerance.4.4 The part identification number (pin) shall consist of the basic CID number followed by a dashnumber from Table I.Example: AA 55624 - 87Designates dash numberCID numberDesignates a
12、 CIDAA55624 - 87 = indicates UNC-2A thread, plastic -nylon, slotted, pan head machine screw, .190inch nominal diameter, .500 inch long.4.5 Preservation, packing, and marking shall be as specified in the contract or order.Provided by IHSNot for ResaleNo reproduction or networking permitted without li
13、cense from IHS-,-,-A-A-556244TABLE II. SUPERSESSION TABLEMILITARYPINMS18212REPLACEMENTCID PINAA55624MILITARYPINMS18212REPLACEMENTCID PINAA55624MILITARYPINMS18212REPLACEMENTCID PINAA55624MILITARYPINMS18212REPLACEMENTCID PINAA55624-1 -1 -26 -43 -51 -74 -77 -105-2 -2 -27 -44 -52 -75 -78 -106-3 -3 -28 -
14、45 -53 -76 -79 -107-4 -4 -29 -46 -54 -77 -80 -108-5 -5 -30 -47 -55 -78 -81 -109-6 -6 -31 -48 -56 -79 -82 -110-7 -7 -32 -49 -57 -80 -83 -111-8 -8 -33 -50 -58 -82 -84 -113-9 -9 -34 -51 -59 -83 -85 -114-10 -10 -35 -53 -60 -84 -86 -115-11 -21 -36 -54 -61 -85 -87 -116-12 -22 -37 -55 -62 -86 -88 -117-13 -
15、23 -38 -56 -63 -87 -89 -118-14 -24 -39 -61 -64 -88 -90 -119-15 -25 -40 -62 -65 -89 -91 -120-16 -26 -41 -63 -66 -90 -92 -125-17 -27 -42 -64 -67 -91 -93 -127-18 -28 -43 -65 -68 -93 -94 -128-19 -29 -44 -66 -69 -94 -95 -129-20 -30 -45 -67 -70 -95 -96 -131-21 -31 -46 -68 -71 -96 -97 -133-22 -33 -47 69 -7
16、2 -97 -98 -134-23 -34 -48 -70 -73 -98 -99 -135-24 -41 -49 -71 -74 -99 -100 -136-25 -42 -50 -73 -75 -100 -101 -137-76 -104 -102 -138Military Interests: Preparing Activity:DLA-ISCustodians:Army-AT,AV,MI (Project 5305-2187)Navy-AS,MC,OSAir Force-82Reviewer:Army-ARNavy-SHAir Force-99Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
