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Technical Data Sheet
PartsTable / COMPONENT / 163391-4
163391-4 ✓ 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 SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, thread_length: 0.387 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-362-4599, 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
163391-4
NSN: 5305-01-362-4599
FSC: 5305
CAGE: 61742 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
head_stylePAN
head_height0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
thread_length0.387 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
screw_materialSTEEL
fastener_length0.437 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.112 INCHES IN
screw_surface_treatmentPASSIVATE
thread_quantity_per_inch40
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-362-4599
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 163391-4 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD STYLE: PAN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
FASTENER LENGTH: 0.437 INCHES NOMINAL IN
•
SCREW MATERIAL: STEEL
•
HEAD HEIGHT: 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: PASSIVATE
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
THREAD LENGTH: 0.387 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEPAN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
FASTENER LENGTH0.437 INCHES NOMINAL IN
SCREW MATERIALSTEEL
HEAD HEIGHT0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTPASSIVATE
NOMINAL THREAD DIAMETER0.112 INCHES IN
THREAD LENGTH0.387 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
THREAD CLASS2A A
HEAD DIAMETER0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
986144-1Interchangeable
interchangeable cross-reference
interchangeable
17045Interchangeable
interchangeable cross-reference
interchangeable
7024Interchangeable
interchangeable cross-reference
interchangeable
M5501-9-F5Interchangeable
interchangeable cross-reference
interchangeable
G383518-1Interchangeable
interchangeable cross-reference
interchangeable
17044Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 163391-4?
163391-4 is a SCREW,MACHINE.
What parts can replace 163391-4?
There are 10 known substitutes for 163391-4: 986144-1, 17045, 7024 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 163391-4?
163391-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-362-4599. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026