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Technical Data Sheet
PartsTable / COMPONENT / A2903M
A2903M ✓ 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 RING,RETAINING 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 5325-00-350-6639, 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
A2903M
NSN: 5325-00-350-6639
FSC: 5325
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
Part NumberA2903M
NSN5325-00-350-6639
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A2903M · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
34322Interchangeable
interchangeable cross-reference
interchangeable
B7FInterchangeable
interchangeable cross-reference
interchangeable
43-510-000Interchangeable
interchangeable cross-reference
interchangeable
A4346-34322Interchangeable
interchangeable cross-reference
interchangeable
M1CSSVT33.5PHNInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A2903M?
A2903M is a RING,RETAINING.
What parts can replace A2903M?
There are 5 known substitutes for A2903M: 34322, B7F, 43-510-000 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A2903M?
A2903M is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-350-6639. 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