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PartsTable / COMPONENT / 1903089
1903089 ✓ 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: ROUND, head_height: 0.123 INCHES MINIMUM IN, thread_class: 2A A, head_diameter: 0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN, thread_length: 0.188 INCHES NOMINAL IN, fastener_length: 0.188 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-013-2887, 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
1903089
NSN: 5305-00-013-2887
FSC: 5305
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
head_styleROUND
head_height0.123 INCHES MINIMUM IN
thread_class2A A
head_diameter0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
thread_length0.188 INCHES NOMINAL IN
screw_materialSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
fastener_length0.188 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.190 INCHES IN
screw_surface_treatmentCADMIUM OR ZINC
thread_quantity_per_inch32
NSN5305-00-013-2887
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1903089 · 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 SERIES DESIGNATOR: UNF
•
SCREW MATERIAL: STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD LENGTH: 0.188 INCHES NOMINAL IN
•
HEAD DIAMETER: 0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.188 INCHES NOMINAL IN
•
INTERNAL DRIVE STYLE: SLOT
•
SCREW SURFACE TREATMENT: CADMIUM OR ZINC
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF
SCREW MATERIALSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.188 INCHES NOMINAL IN
HEAD DIAMETER0.334 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
FASTENER LENGTH0.188 INCHES NOMINAL IN
INTERNAL DRIVE STYLESLOT
SCREW SURFACE TREATMENTCADMIUM OR ZINC
NOMINAL THREAD DIAMETER0.190 INCHES IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1S STYLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
2810H21-002-1Interchangeable
interchangeable cross-reference
interchangeable
61-293Interchangeable
interchangeable cross-reference
interchangeable
132887Interchangeable
interchangeable cross-reference
interchangeable
4787XInterchangeable
interchangeable cross-reference
interchangeable
V4787XInterchangeable
interchangeable cross-reference
interchangeable
11A8716Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1903089?
1903089 is a SCREW,MACHINE.
What parts can replace 1903089?
There are 7 known substitutes for 1903089: 2810H21-002-1, 61-293, 132887 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1903089?
1903089 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-013-2887. 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