HT4009-4-8

Part identification

NSN	5305-01-046-0704
NIIN	01-046-0704
FSC	5305
FSG	53
Item Name	Screw, Shoulder
INC	22846
Assigned Date	11-AUG-1977
Status	Active

Technical characteristics

Thread Class	3A
Thread Direction	Right-hand
Thread Length	0.372 inches minimum and 0.422 inches maximum
Fastener Length	0.882 inches minimum and 0.912 inches maximum
Head Style	Flat countersunk
Head Diameter	0.456 inches minimum and 0.508 inches maximum
Shoulder Diameter	0.2802 inches minimum first shoulder and 0.2807 inches maximum first shoulder
Shoulder Length	0.395 inches minimum first shoulder and 0.415 inches maximum first shoulder
Internal Drive Style	High-torque
Nominal Thread Diameter	0.250 inches
Thread Quantity per Inch	28
Countersink Angle	99.0 degrees minimum and 101.0 degrees maximum
Shoulder Shape	Round first shoulder
Special Features	Socket drive recess in thread end 0.0947 in. min and 0.0967 in. max width across flats
Material	Steel comp XM-13 overall
Material Document and Classification	AMS5629 assn std single material response overall
Surface Treatment	Passivate overall
Surface Treatment Document and Classification	QQ-P-35 fed spec single treatment response overall
Thread Series Designator	UNJF

Manufacturers

Alcoa Global Fasteners Inc. (CAGE 06950) — Type A

Alcoa Global Fasteners Inc. (CAGE 92215) — Type A

Alcoa Global Fasteners Inc. (CAGE 92215) — Type A

Boeing Company, The (CAGE 76301) — Type A

HI-Shear Corporation (CAGE 73197) — Type A

Huck International Inc. (CAGE 17446) — Type A

Huck Intl Inc. (CAGE 97928) — Type A

Lisi Aerospace Canada Corp. (CAGE L4528) — Type E

Paeaeesikunta (CAGE A486G) — Type H

SPS Technologies LLC (CAGE 56878) — Type A

SPS Technologies LLC (CAGE 80539) — Type A

Alternate part numbers

10427373 (CAGE A486G)

HT4009-4-8 (CAGE 06950)

HT4009-4-8 (CAGE 17446)

HT4009-4-8 (CAGE 56878)

HT4009-4-8 (CAGE 73197)

HT4009-4-8 (CAGE 80539)

HT4009-4-8 (CAGE 92215)

HT4009-4-8 (CAGE 97928)

HT4009-4-8 (CAGE L4528)

ST3M505-4-8 (CAGE 76301)

ST3M505-4-8 (CAGE 92215)