AIA/NAS 1581-2009 pdf download BOLT, SHEAR, 100 o FLUSH REDUCED HEAD, OFFSET CRUCIFORM, OFFSET CRUCIFORM – RIBBED AND DOVETAIL SLOT, 95 KSI FSU
ECESS: CODE LETTER “H” FOLLOWING DIA DASH NUMBER INDICATES DOVETAIL SLOT RECESS PER NASM33750.
CODE LETTER “R” FOLLOWING DIA DASH NUMBER INDICATES RIBBED OFFSET CRUCIFORM RECESS PER NASM14191 FOR DIA DASH NUMBERS 3, 4 AND 5.
CODE LETTER “T” FOLLOWING DIA DASH NUMBER INDICATES OFFSET CRUCIFORM RECESS PER NASM33781.
OVERSIZE: CODE LETTER “X” FOLLOWING THE GRIP DASH NUMBER INDICATES REPLACEMENT OVERSIZE REPAIR BOLT. (SEE SHEET 6)
EXAMPLE NAS1581C4H5 = .2500-28 CRES BOLT, .312 GRIP LENGTH, PASSIVATED, NASM33750 DOVETAIL SLOT RECESS.
OF PART NAS1581C4T5P = .2500-28 CRES BOLT, .312 GRIP LENGTH, CADMIUM PLATE, NASM33781 OFFSET NUMBER:
CRUCIFORM RECESS.
NOTES:
1. CONCENTRICITY: CONICAL SURFACE OF THE HEAD TO ØD SHALL BE WITHIN .003 FIM.
ØD TO THREAD PITCH DIAMETER SHALL BE WITHIN .0045 FIM FOR DIA DASH NUMBER -3 THRU -5, AND SHALL BE WITHIN .006 FIM FOR DIA DASH NUMBER -6 AND LARGER.
2. SURFACE TEXTURE: SEE PROCUREMENT SPECIFICATION.
3. DELETED.
4. BREAK SHARP EDGES AND REMOVE ALL BURRS.
5. DIMENSIONS IN INCHES AND SHALL BE MET AFTER FINISH, IF APPLICABLE.
6. NASM14191 RECESS APPLICABLE TO DIA DASH NUMBERS 3, 4 AND 5. NASM33781 AND NASM33750 RECESS APPLICABLE TO ALL DIA DASH NUMBERS.
7. DELETED.
(8) MATERIAL CODES “A” AND “V” CANCELLED AFTER DECEMBER 1991. SEE “F”, “K”, OR “C” CODES. “F” AND “K” CODES REPRESENT REDUCED TENSILE VALUES BASED ON HEAD STRENGTH. FOR DESCRIPTION OF STATUS NOTES SEE NAS380.
(9) FOR CRES ONLY, THE EFFECT OF COLD WORK AND AGING INDUCED DURING THE MANUFACTURING CYCLE MAY INCREASE THE ULTIMATE TENSILE STRENGTH OF THE FINISHED PART, BUT ANY PART (TYPE I, II OR III AS LISTED IN NAS4003) SHALL NOT EXCEED 1.3 TIMES THE SPECIFIED TYPE I MINIMUM TENSILE VALUES AS LISTED IN NAS4003.
(10) FLUSH HEAD PROTRUSION VALUES AND GAGING METHOD PER NAS9800.
(11) GRIP LENGTH SHALL BE MEASURED FROM THE TOP OF BOLT HEAD TO THE END OF THE FULL CYLINDRICAL PORTION OF THE SHANK.
(12) ØA, E, AND H ARE INCLUDED FOR ENGINEERING REFERENCE PURPOSES ONLY AND ARE NOT TO BE USED FOR INSPECTION. VALUES ØA, E AND H ARE CALCULATED LIMITS RESULTING FROM THE TOLERANCE ON ØD, HEAD ANGLE AND THE APPLICABLE HEAD PROTRUSION AND GAGE DIAMETER AS DEFINED IN NAS9800.
(13) HEAD EDGE OUT OF ROUNDNESS SHALL NOT EXCEED “Y” FIM.
(14) SHANK SHALL BE STRAIGHT WITHIN “Z” VALUES FIM PER INCH OF LENGTH.
(15) POINT SHALL BE FLAT AND CHAMFERED. CHAMFER PLUS INCOMPLETE THREAD SHALL NOT EXCEED “U”.
(16) PER APPLICABLE PROCUREMENT SPECIFICATION, THE BOLT RECESS SHALL BE TORQUE TESTED IN BOTH INSTALLATION AND REMOVAL DIRECTION WITH APPLICABLE NASM33781, NASM14191 OR NASM33750 DRIVER WITH AXIAL END PRESSURE NOT EXCEEDING 15 POUNDS. BOLTS ARE REJECTABLE IF MINIMUM TORQUE VALUES LISTED BELOW CAUSE FRACTURE OF BOLT OR DISTORTION WHICH RESULTS IN RAISE OF METAL AT EDGE OF RECESS EXCEEDING .005 ABOVE SURROUNDING AREA.