AN179-33

Part identification

NSN	5306-00-180-0405
NIIN	00-180-0405
FSC	5306
FSG	53
Item Name	Bolt, Close Tolerance
INC	27851
Assigned Date	01-JAN-1963
Status	Active

Technical characteristics

Thread Class	3A
Thread Direction	Right-hand
Thread Length	0.906 inches minimum
Fastener Length	3.531 inches nominal
Head Style	Hexagon
Head Height	0.296 inches minimum and 0.328 inches maximum
Width Between Flats	0.865 inches minimum and 0.877 inches maximum
Grip Diameter	0.5611 inches minimum and 0.5616 inches maximum
Shank Unthreaded Hole Diameter	0.141 inches nominal first hole
Nominal Thread Diameter	0.562 inches
Grip Length	2.625 inches nominal
Thread Quantity per Inch	18
Minimum Tensile Strength	125000 pounds per square inch
Hardness Rating	26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
Distance from Head Largest Bearing Surface to Shank Hole Center	3.281 inches nominal first hole
Surface Finish	63.0 microinches bearing surface of head
Surface Finish	63.0 microinches grip
Material	Steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4140 overall or steel comp 4130 overall or steel comp 4037 overall
Material Document and Classification	MIL-S-6049 mil spec 1ST material response overall or MIL-S-6050 mil spec 2ND material response overall or MIL-S-6098 mil spec 3RD material response overall or MIL-S-5626 mil spec 4TH material response overall or MIL-S-6758 mil spec 5TH material response overall or ams 6300 assn std 6TH material response overall
Surface Treatment	Cadmium overall and chromate overall
Surface Treatment Document and Classification	QQ-P-416 type 2 class 3 fed spec all treatment responses overall
Thread Series Designator	UNF

Manufacturers

Aeronautical Standards Group (CAGE 88044) — Type M

Alternate part numbers

AN179-33 (CAGE 88044)