Part Number: BACS12CB3-44

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CONDITION:
NS
THE BOEING COMPANY81205
NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE80205
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.750 INCHES MINIMUM
FASTENER LENGTH2.660 INCHES MINIMUM AND 2.750 INCHES MAXIMUM
HEAD STYLEHEXAGON
HEAD HEIGHT0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER0.190 INCHES
THREAD QUANTITY PER INCH32
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
SCREW MATERIALSTEEL COMP 4037 OR STEEL COMP 8630
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6300 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE
THREAD SERIES DESIGNATORUNJF
An externally threaded fastener whose threaded portion is of one nominal diameter, No ( . 6 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 1 ( .19 in./5 mm). No. 1 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.