844378-22 — Technical Data Sheet

✓ Verified by PartsTable

— · BOLT SCREW

WHAT YOU NEED TO KNOW

Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch

Verify thread pitch — metric != imperial

PRODUCT OVERVIEW

The SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL, head_style: HEADLESS (SETSCREW), point_style: CUP, spline_width: 0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.125 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System under NSN 5305-00-805-9748, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

844378-22

NSN: 5305-00-805-9748
FSC: 5305
CAGE: 49671 — LOCKHEED MARTIN CORPORATION DBA LOCKHEED MARTIN DIV LOCKHEED MARTIN (USA)

SPECIFICATIONS

material	STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
head_style	HEADLESS (SETSCREW)
point_style	CUP
spline_width	0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN
thread_class	3A A
thread_length	0.125 INCHES MAXIMUM IN
fastener_length	0.125 INCHES NOMINAL IN
hardness_rating	45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM AND CHROMATE OVERALL
internal_drive_style	SIX SPLINE
spline_major_diameter	0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
NSN	5305-00-805-9748

COMPONENT DIAGRAM

KEY FEATURES

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POINT STYLE: CUP

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INTERNAL DRIVE STYLE: SIX SPLINE

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SPLINE WIDTH: 0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN

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NOMINAL THREAD DIAMETER: 0.112 INCHES IN

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MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL

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MATERIAL: STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL

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THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)

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HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL

TECHNICAL CHARACTERISTICS

POINT STYLE	CUP
INTERNAL DRIVE STYLE	SIX SPLINE
SPLINE WIDTH	0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER	0.112 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATION	66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIAL	STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING	45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL

VERIFIED SUBSTITUTES & CROSS-REFERENCES 24

73650InterchangeableGOVERNMENT REGISTRY