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Technical Data Sheet
PartsTable / COMPONENT / 25903
25903 ✓ Verified by PartsTable
Ugreen · 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 IBM PCI ULTRA MAG MEDIA CTLR is a Ugreen industrial component. Key specifications include nut_length: 1.396 INCHES MINIMUM AND 1.405 INCHES MAXIMUM IN, thread_class: 2B, thread_length: 0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND, nominal_thread_size: 0.3125 INCHES 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 5307-00-261-0441, 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
25903
NSN: 5307-00-261-0441
FSC: 5307
CAGE: 03092 — AMERICAN TRACTOR EQUIPMENT CORP (USA)
SPECIFICATIONS
nut_length1.396 INCHES MINIMUM AND 1.405 INCHES MAXIMUM IN
thread_class2B
thread_length0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
nominal_thread_size0.3125 INCHES IN
thread_quantity_per_inch18
NSN5307-00-261-0441
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 25903 · Ugreen ⚠ 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: 5A STUD THREAD A
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
THREAD LENGTH: 0.625 INCHES NOMINAL NUT THREAD IN
•
THREAD QUANTITY PER INCH: 18 NUT THREAD
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS5A STUD THREAD A
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD LENGTH0.625 INCHES NOMINAL NUT THREAD IN
THREAD LENGTH0.938 INCHES MINIMUM STUD THREAD IN
THREAD QUANTITY PER INCH18 NUT THREAD
THREAD QUANTITY PER INCH11 STUD THREAD
OVERALL LENGTH2.500 INCHES NOMINAL IN
THREAD CLASS2A NUT THREAD A
NOMINAL THREAD SIZE0.625 INCHES STUD THREAD IN
MATERIALSTEEL COMP 1035
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
25903Interchangeable
interchangeable cross-reference
interchangeable
27249Interchangeable
interchangeable cross-reference
interchangeable
2749Interchangeable
IBM PCI Ultra Mag Media Ctlr
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 25903?
25903 is a IBM PCI ULTRA MAG MEDIA CTLR manufactured by Ugreen.
What parts can replace 25903?
There are 3 known substitutes for 25903: 25903, 27249, 2749. Substitute compatibility should be verified for your specific system.
What is the NSN for 25903?
25903 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-261-0441. 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