AN176-33

Part identification

NSN	5306-00-584-7489
NIIN	00-584-7489
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	0.609 inches minimum and 0.688 inches maximum
Fastener Length	3.437 inches minimum and 3.484 inches maximum
Head Style	Hexagon
Head Height	0.203 inches minimum and 0.235 inches maximum
Width Between Flats	0.553 inches minimum and 0.565 inches maximum
Grip Diameter	0.3737 inches minimum and 0.3742 inches maximum
Nominal Thread Diameter	0.375 inches
Grip Length	2.796 inches minimum and 2.828 inches maximum
Thread Quantity per Inch	24
Minimum Tensile Strength	125000 pounds per square inch
Hardness Rating	26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
Surface Finish	125.0 microinches threads
Surface Finish	250.0 microinches top of head
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, ty 2, cl 3 fed spec all treatment responses overall
Thread Series Designator	UNF

Manufacturers

Aeronautical Standards Group (CAGE 88044) — Type M

Piper Aircraft Inc. (CAGE 77294) — Type A

Alternate part numbers

402 360 (CAGE 77294)

AN176-33A (CAGE 88044)