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Technical Data Sheet
PartsTable / COMPONENT / 5/8-11UNC-3A X 5 1/2 INCHESL1
5/8-11UNC-3A X 5 1/2 INCHESL1 ✓ 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 5/8-11UNC-3A X 5 1/2 INCHESL1 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 5307-01-306-7531, 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
5/8-11UNC-3A X 5 1/2 INCHESL1
NSN: 5307-01-306-7531
FSC: 5307
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part Number5/8-11UNC-3A X 5 1/2 INCHESL1
NSN5307-01-306-7531
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5/8-11UNC-3A X 5 1/2 INCHESL1 · 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
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
MATERIAL: NICKEL ALLOY 400
•
NONDEFINITIVE SPEC/STD DATA: 4 TYPE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
CRITICALITY CODE JUSTIFICATIONZZZW
OVERALL LENGTH5.500 INCHES NOMINAL IN
MATERIALNICKEL ALLOY 400
NONDEFINITIVE SPEC/STD DATA4 TYPE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
7/8-9UNC-2A X 4IN CLASS A TYPL1Interchangeable
interchangeable cross-reference
interchangeable
MS35311-217Interchangeable
interchangeable cross-reference
interchangeable
MS35311-217L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222 QQ-N-281 GR400L1Interchangeable
interchangeable cross-reference
interchangeable
3/4-10UNC-2A X 2 3/4 TYPE 1 CLL1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222 QQ-N-281 GR400Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5/8-11UNC-3A X 5 1/2 INCHESL1?
5/8-11UNC-3A X 5 1/2 INCHESL1 is a 5/8-11UNC-3A X 5 1/2 INCHESL1.
What parts can replace 5/8-11UNC-3A X 5 1/2 INCHESL1?
There are 28 known substitutes for 5/8-11UNC-3A X 5 1/2 INCHESL1: 7/8-9UNC-2A X 4IN CLASS A TYPL1, MS35311-217, MS35311-217L1 and 25 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5/8-11UNC-3A X 5 1/2 INCHESL1?
5/8-11UNC-3A X 5 1/2 INCHESL1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-01-306-7531. 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