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5/8-11UNC-3A X3 1/4 INCHESL1 — Technical Data Sheet

✓ 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 STUD,CONTINUOUS THREAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400, thread_class: 3A STUD THREAD A, overall_length: 3.250 INCHES NOMINAL IN, thread_direction: RIGHT-HAND STUD THREAD, nominal_thread_size: 0.625 INCHES STUD THREAD IN, thread_quantity_per_inch: 11 STUD THREAD. This part is cataloged in the Federal Logistics Information System under NSN 5307-01-306-7534, 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 X3 1/4 INCHESL1
NSN: 5307-01-306-7534
FSC: 5307
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400
thread_class3A STUD THREAD A
overall_length3.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.625 INCHES STUD THREAD IN
thread_quantity_per_inch11 STUD THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
nondefinitive_spec/std_dataIV TYPE
departure_from_cited_documentQUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
criticality_code_justificationZZZW
material_document_and_classificationQQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
NSN5307-01-306-7534
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5/8-11UNC-3A X3 1/4 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
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
THREAD CLASS: 3A STUD THREAD A
•
NONDEFINITIVE SPEC/STD DATA: IV TYPE
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) STUD THREAD
•
DEPARTURE FROM CITED DOCUMENT: QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
•
MATERIAL: NICKEL ALLOY 400
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZW
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD CLASS3A STUD THREAD A
NONDEFINITIVE SPEC/STD DATAIV TYPE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) STUD THREAD
DEPARTURE FROM CITED DOCUMENTQUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
MATERIALNICKEL ALLOY 400
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
THREAD QUANTITY PER INCH11 STUD THREAD
NOMINAL THREAD SIZE0.625 INCHES STUD THREAD IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
5/8-11UNC-2A X 4 1/2 INCHESL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
QQ-N-281 GRADE 400, CLASS AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5/8-11UNC-2A X 4 1/2 INCHESInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1/2-13UNC-2Z X 5, TYI CLASS AL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222L1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
QQ-N-281, GRADE 400, CLASS AL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5/8-11UNC-3A X3 1/4 INCHESL1?
5/8-11UNC-3A X3 1/4 INCHESL1 is a STUD,CONTINUOUS THREAD.
What parts can replace 5/8-11UNC-3A X3 1/4 INCHESL1?
There are 21 known substitutes for 5/8-11UNC-3A X3 1/4 INCHESL1: 5/8-11UNC-2A X 4 1/2 INCHESL1, QQ-N-281 GRADE 400, CLASS A, 5/8-11UNC-2A X 4 1/2 INCHES and 18 more. Substitute compatibility should be verified for your specific system.
Is 5/8-11UNC-3A X3 1/4 INCHESL1 still available?
5/8-11UNC-3A X3 1/4 INCHESL1 is currently cancelled.
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Last verified: October 2026