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Technical Data Sheet
PartsTable / COMPONENT / FS2003-04/155C
FS2003-04/155C ✓ 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 FS2003-04/155C is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-159-9593, 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
FS2003-04/155C
NSN: 5305-00-159-9593
FSC: 5305
CAGE: 58998 — FASTENER INNOVATION TECHNOLOGY, INC. DBA F I T (USA)
SPECIFICATIONS
Part NumberFS2003-04/155C
NSN5305-00-159-9593
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FS2003-04/155C · 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
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 40
•
SCREW MATERIAL: IRON ALLOY 660
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
HEAD STYLE: FLAT COUNTERSUNK
•
HEAD DIAMETER: 0.191 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD LENGTH: 0.245 INCHES MINIMUM AND 0.326 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A A
THREAD QUANTITY PER INCH40
SCREW MATERIALIRON ALLOY 660
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
HEAD STYLEFLAT COUNTERSUNK
HEAD DIAMETER0.191 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD LENGTH0.245 INCHES MINIMUM AND 0.326 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
FASTENER LENGTH0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
7-802-000001Interchangeable
interchangeable cross-reference
interchangeable
12A0702Interchangeable
interchangeable cross-reference
interchangeable
374750Interchangeable
interchangeable cross-reference
interchangeable
9145-155Interchangeable
Same NIIN cross-reference
interchangeable
E125-155Interchangeable
Same NIIN cross-reference
interchangeable
965813-155CInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FS2003-04/155C?
FS2003-04/155C is a FS2003-04/155C.
What parts can replace FS2003-04/155C?
There are 7 known substitutes for FS2003-04/155C: 7-802-000001, 12A0702, 374750 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FS2003-04/155C?
FS2003-04/155C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-159-9593. 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