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Technical Data Sheet
PartsTable / COMPONENT / 121503-4
121503-4 ✓ 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 BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include special_features: ESSENTIAL TO WEAPON SYSTEM PERFORMANCE OR OPERATION, OR THE PRESERVATION OF LIFE OR SAFETY OF OPERATING PERSONNEL, end_item_identification: MV-22 AIRCRAFT, criticality_code_justification: FEAT, part_name_assigned_by_controlling_agency: BOLT,INTERNAL,WRE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-542-5908, 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
121503-4
NSN: 5306-01-542-5908
FSC: 5306
CAGE: 60119 — MONADNOCK COMPANY, THE DBA LISI AEROSPACE (USA)
SPECIFICATIONS
special_featuresESSENTIAL TO WEAPON SYSTEM PERFORMANCE OR OPERATION, OR THE PRESERVATION OF LIFE OR SAFETY OF OPERATING PERSONNEL
end_item_identificationMV-22 AIRCRAFT
criticality_code_justificationFEAT
part_name_assigned_by_controlling_agencyBOLT,INTERNAL,WRE
NSN5306-01-542-5908
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121503-4 · 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
•
CRITICALITY CODE JUSTIFICATION: FEAT
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESESSENTIAL TO WEAPON SYSTEM PERFORMANCE OR OPERATION, OR THE PRESERVATION OF LIFE OR SAFETY OF OPERATING PERSONNEL
END ITEM IDENTIFICATIONMV-22 AIRCRAFT
CRITICALITY CODE JUSTIFICATIONFEAT
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT,INTERNAL,WRE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
CA21354-4Upgraded Successor
successor cross-reference
successor
CA21390-4Upgraded Successor
successor cross-reference
successor
121501-4Upgraded Successor
successor cross-reference
successor
MS 16625-1068Interchangeable
interchangeable cross-reference
interchangeable
10319653Interchangeable
interchangeable cross-reference
interchangeable
69998-68Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121503-4?
121503-4 is a BOLT,INTERNAL WRENCHING.
What parts can replace 121503-4?
There are 8 known substitutes for 121503-4: CA21354-4, CA21390-4, 121501-4 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121503-4?
121503-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-542-5908. 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