DLA MS21301 REV B-1995 SCREW SHOULDERED HEX-SOCKET HEAD 375 500 625 UNC-3A UNPLATED《未镀金属的六角凹头螺钉0 375 0 500 0 625 UNC-3A带肩螺丝》.pdf

1、1 OMB ND 0704-0188 Form Approved E d Q E I o z B I f X !- W I O ENTIRE SPECIFICATION REVISED SPECIFICATION SHEET NUMBER MS21301 27 JUN 95 REV B REPARING ACTIVITY: DU-IS MILITARY SPECIFICATION SHEET :USTODIANS. ARMY- ER NAVY- YD TITLE AIR FORCE- 99 lEVlEW AR, GL. NS, MC, FSS, 82 SER - SCREW. SHOULDER

2、ED, HEX-SOCKET HEAD .375, ,500. .625 UNC-JA, UNPLATEO SUPERSEDING MS21301A 21 DEC 67 AMSC- N/A FSC 5305 ROJECT NUMBER. 5305-2082 I I IISTRIBUTION STATEMENT A. ADDroved for Dubllc release. dstributlon IS unlmnted DD Form 672, MAY 88 moti5 WNS ME OBY)LtlL Provided by IHSNot for ResaleNo reproduction o

3、r networking permitted without license from IHS-,-,-US21301 REV B = 9999932 0087877 357 TBALE Il. DASH NUMBERS AND 0IMEMQ.E Form Approved OMB NO. 0704-018a 1 SHOULDERED DIAMETER NOMINAL SIZE ,375 ,500 I ,625 I REPUIREMENTS: 1 MATERIAL: MATERIAL SHALL BE ALLOY STEEL GRADE 4340 (UNS G43400) IN ACCORDA

4、NCE WITH AMS 6415 OR MIL-S-5000 2. PROTECTIVE COATING. UNCOATED (NONE) 3 THRFADS THREADS SHALL BE IN ACCORDANCE WITH FED-STD-H28/2. ACCEPTABILITY DF SCREW THREADS SHALL BE IN ACCORDANCE WITH FED-STD-H28/20. SYSTEM 22 4 TENSILE STRENGTH. ULTIMATE TENSILE STRENGTH SHALL BE 140 KSI. EASED ON THE MINIMU

5、M THREAD NECK AREA 5 HARDNFSS HARDNESS SHALL BE IN THE RANGE OF 32 TO 43 HRC 6 PART NUMBER THE PART NUMBER SHALL CONSIST OF THE BASIC MS NUMBER FOLLOWED BY A DASH NUMBER FROM TABLE II e DASH NUMBER BASIC M5 NUMBER MS21301-5 INDICATES - SCREW, SHOULDER, HEX-SOCKET HEAD. 375 SHOULDER DIAMETER. 3125-18

6、 UNC-JA THREAD SIZE, 1 50 SHOULDER LENGTH NOTES, 1. ALL DIMENSIONS ARE IN INCHES. INTERPRET DIMENDIONS AND TOLERANCES IN ACCORDANCE WITH ANSI Y14.5M 2. IN THE EVENT DF A CONFLICT BETWEEN THE TEXT OF THIS DOCUMENT AND THE REFERENCES CITED HEREIN, THE TEXT OF THIS DOCUMENT SHALL TAKE PRECEDENCE 3 UNLE

7、SS OTHERWISE SPECIFIED. ISSUES OF REFERENCED DOCUMENTS ARE THOSE IN EFFECT AT THE TIME OF SOLICATION 4. SEE M551975 FOR CADMIUM PLATED ALLOY STEEL SCREWS AND MS51576 FOR CRES SCREWS. PREPARING ACTIVITY DLA-IS MS21301 T,C XISTDDI&NS ARMY- ER NAW- YD MILITARY SPECIFICATION SHEET 27 JUN 95 REV B AIR FO

8、RCE- 99 INIEW. AR, GL. NS. MC, FSS. 62 JSER - SCREW, SHOULDERED, HEX-SOCKET HEAD ,375. .500. ,525 UNC-3A, UNPLATED ROJECT NUMBER. 5305-2082 FSC 5305 ISTRIBUTION STATEMENT A. AnDroved for Dubllc releose. disinbution IS unlirnlted Poge 2 of 2 DD Form 672, MAY 88 PR“ ms M mm Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-