1、AMSC N/A 1 of 3 FSC 5305 DETAIL SPECIFICATION SHEET SCREW, MACHNE, PAN HEAD, CROSS-RECESSED, CARBON STEEL, UNF-2A This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this spe
2、cification sheet and FF-S-92. ADPRFIGURE 1. SCREW. MS51492A 20 October 2011 SUPERSEDING MS51492 Amendment 1 5 October 1992 INCH-POUND Inactive for new design after 18 November 1999 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51492A 2 TABLE I. S
3、crew Dash Numbers and Dimensions NOMINAL SIZE .112 .138 .164 .190 .250 THREADS PER INCH UNC-2A 40 32 32 24 20 D - BODY DIAMETER MAX MIN .1120 .0925 .1380 .1141 .1640 .1399 .1900 .1586 .2500 .2127 A - HEAD DIAMETER MAX MIN .2190 .2050 .2700 .2560 .3220 .3060 .3730 .3570 .4920 .4730 H HEAD HEIGHT MAX
4、MIN .0800 .0700 .0970 .0870 .1150 .1050 .1330 .1220 .1750 .1620 P - HEAD RADIUS REF .0100 .0150 .0150 .0200 .0350 R - FILLET RADIUS MAX .0170 .0210 .0250 .0290 .0380 MINIMUM TENSILE LOAD LBS. 360 545 840 1,050 1,900 L LENGTH TOLERANCE DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. .250 .375 .500 .625
5、.750 1.000 +.000 - .031 01 02 03 04 05 06 07 08 09 10 13 14 15 16 17 19 20 21 22 23 1.250 1.500 2.000 +.000 - .062 11 12 18 24 25 3.000 +.000 - .094 26 NOTES: 1. Material: Carbon steel, in accordance with ASTM-A29/A29M grade 1015 (UNS G10150) thru grade 1030 (UNS G10300) or ASTM A29 grade 1116 (UNS
6、G11160) thru grade 1132 (UNS G11320). The minimum ultimate tensile strength shall be 60,000 PSI. 2. Finish. Zinc coating in accordance with ASTM B633, Fe/Zn5 (5 m), Type II. 3. Threads: The threads shall be in accordance with FED-STD-H28/2. Acceptability of screw threads shall be in accordance with
7、FED-STD-H 28/20, system 21. 4. Thread length: Screws 2.000 inches long and shorter shall have complete threads extending to within 2 threads of the bearing surface of the head, or closer if practicable. Longer screws have a minimum thread length of 1.750 inches. Threads shall not extend to the fille
8、t radius nor shall threads extend to and undercut the head of the screw. 5. Recess. The recess shall be in accordance with NASM9006. 6. Part number: The basic MS part number is followed by a dash number from Table I. Example: MS51492-01 - Screw, Machine, Pan Head, CrossRecessed, Carbon Steel, .112 -
9、 40UNC-2A, Length .625, Zinc Coated. 7. All dimensions are in inches. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51492A 3 8. Referenced documents shall be of the issue in effect on date of invitations for bids or request for proposal, except t
10、hat referenced adopted industry documents shall give the date of the issue adopted. 9. For design feature purposes, this standard takes precedence over documents referenced herein. 10. Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to t
11、he previous issue due to the extent of the changes. Custodians: Preparing activity: Army AR DLA IS Air Force 99 (Project 5305-2011-009) NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
