I.fiL-S /la 31 March 1986 Si.JPERSEDING MIL-S-63540/1 28 June 1982

Transcription

1 I.fiL-S /la 31 March 1986 Si.JPERSEDING MIL-S-63540/1 28 June 1982 MILITARY SPECIFICATION SHEET S'IUD, SELF-LOCKING; FLUSH HEAD, RIBBED CLINCH TYPE This specification is approved for use by all Deparbrents and Agencies of the Department of Defense. The requirements for acquiring the studs described herein shall consist of this specification and the latest issue of MIL-S ~ L ~~ ~H-- NarES: All dimensions are in inches. Clinching profile may vary. FIGURE l. STDD, SELF-LOCKINGr FLUSH HEAD, RIBBED CLINCH Denotes changes AMSC N/A 1 of 8 FSC 5307 DIS'I'RIBUTION STATEME:Nr A. Approved for public release; distribution is unlimited.

2 TABLE I. T s THREAD SIZE STUD {l)o H CLASS 2A DIA NAX UNC.086 (2-56) UNC.112 (4-40) UNC (6-32) UNC (8-32) UNC (10-24) UNF (10-32) ~ UNC (1/4-20) UNC (5/16-18). 2

3 TABLE II. THREAD SIZE AND LENGI'H OOSH NUMBERS T THREAD SIZE - ClASS 2A I L MA..TERIAL DOC DOC.138:..32 UNC UNC.190-'24 uoc UNF UNC UNC!_ CARBON STEE:L 1 6 CRES lc '6C.313 CARBON ST"..LL CRES 2C 7C 12C THREAD SIZE AND LENGTH OOSH NllMBER.375 CARBON STEE:L CRES 3C 8C 13C 20C 28C 36C.500 CARBON STSEL CRES 4c 9C 14C 21C 29C 37C 44C.625 CARBON STEE:L CRES 5C loc 15C 22C 30C 38C 45C 51C 750 CARBON S'l:'EEJ CRES llc 16C 23C 31C 39C 46C 52C CARBON STEE:L CRES 17C 24C 32C 40C 47C. 53C CARBON STEE:L CRES 18C 25C 33C 41C 48C 54C CARBON STEE:L CRES 19C 26C 34C 42C 49C sse CARBON STEE:L CRES 27C 35C 43C soc 56C

4 . 1. Material. a. Carbon steel shall be.grade 1005 (UNS Gl0050) thru Grade 1018 (UNS Gl0180} in accordance with ASTM A 29 or ASTM A 510. b. Corrosion resistant steel shall be Type XM-7 (UNS_S30430) in accordance with AS'IM A 493 or Types 303 {UNS ) and 303 Se (UNS ) in accordance with ASTM A Protective finish. Carbon steel studs shall be plated with electrodeposited cadmium in accordance with QQ-P-416, Type II, Class Surface treatment. Corrosion resistant steel studs shall be cleaned, descaled and passivated in accordance with ANSI/AS'I'M A 4. Hardness. a. Carbon steel studs, after carburizing and tempering or carbonitriding, shall have a hardness of 75-87HR15N. The minimum effective depth of case shall be.010 inch. b. Corrosion resistant steel studs shall have a hardness of 171HB minimum. 4

5 5. Push-out and torgue-out values. When the stud is properly installed (see installation procedures), push-out and torque-out values shall be as specified in Table III. TABLE III. PUSH-OUT AND TORQUE-OOT VALUES. T SHEET PUSH-OUT TORQUE-OUT PUSH-OOT TORQUE-cur. THREAD THICK- LOAD LQl\D LOAD LOAD SIZE NESS (LBS) y (IN LBS) y (LBS) y (IN IBS) y CLASS (REF) 1/ MIN MIN 2 MIN MIN 2 2A ALUMINUM ALLOY COLD ROLLED STEEL SHEET MATERIAL y. SHEET MATERIAL ]/ UNC UNC UNC UNC UNC UNF UNC UNC J Test panel thickness (.040 or.060) is optional betweenthread sizes UNC and UNF, provided the corresponding load is maintained. Y The load values shown are the minimum non-destruct.values that apply during testing. lj Sheet material hardness values shall not exceed 80HRB for use with carbon steel studs or exceed 70HRB for use with corrosion resistant steel studs. 5

6 6. Part number. The part nu.rnber consists of the letter "M", the basic, number of this specification sheet and a dash number taken from Table II,. Example: M63540/l~lc I T~... Dash number ' Specification sheet number M63540/l-1C indica,tes - Stud, self-locking, flush head, ribbed clinch type; CRES; UNC-2A threadr.250 length;.144 head diameter;.075 head height. INSTALLA'fiON PRCX::EDURES: a. Any sheet thickness aoove the minimum indicated on Table N for a specific thread size may be used.. b. Drill or punch hole in sheet material with diameter as shown in Table N. b. Locate shank of stud squarely in the hole in the :m:>unting surface, with anvil below sheet {see Figure 2) c. Apply force to embed the head of the. stud flush with the sheet. PUNCH SHEET ANVIL FOR SHEET.060 AND GREATER ANVIL FO~ SHEET.059 AND LESS ~ANVIL HOLE ~- DIAMETER FIGURE 2. GENERAL 'IOOLING SETUP. I-_ ANVIL HOLE f- DIAMETER 6

7 TABLE IV. INSTALLATION DIMENSIONS T HOLE SIZE CENTER OF NUT TIGH'I'ENING ANVIL ANVIL THREAD IN SHEET HOLE 'I'O TORQUE COUN'l'ERSINK HOLE SIZE SHEE'r EDGE (IN IBS) DIAMETER DIAMETER CLASS MIN MAX 2A {REF) {REF)' (REF) ]j {REF) (REF) UNC UNC UNC.; ~ UNC UNC UNF UNC ' UNC ' ~ ]j This load is the limiting load when.the nut is fastened to the stud at installation. 7

8 Custodians: Army- AR Navy - rc Air Force - 99 Review activities: Army -AT, ME Air Force - 11, 82 DLA- IS Preparing activity: Army - AR Agent:. DLA- IS (Project } User activities: Army - ER Navy - NSA - NS OS, SH 8