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1/2-13UNC-3A X 2 1/2 INCHES — 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, head_style: HEXAGON, head_height: 0.642 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN, thread_class: 3A LOCATION NOT OTHERWISE SPECIFIED A, thread_length: 2.500 INCHES NOMINAL IN, overall_length: 2.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5305-01-302-5219, 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
1/2-13UNC-3A X 2 1/2 INCHES
NSN: 5305-01-302-5219
FSC: 5305
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialNICKEL ALLOY
head_styleHEXAGON
head_height0.642 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
thread_class3A LOCATION NOT OTHERWISE SPECIFIED A
thread_length2.500 INCHES NOMINAL IN
overall_length2.500 INCHES NOMINAL IN
fastener_length2.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
width_across_flats0.375 INCHES NOMINAL IN
nominal_thread_size0.500 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
width_between_flats2.500 INCHES NOMINAL IN
internal_drive_styleHEXAGON
NSN5305-01-302-5219
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1/2-13UNC-3A X 2 1/2 INCHES · 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
•
INTERNAL DRIVE STYLE: HEXAGON
•
THREAD QUANTITY PER INCH: 13
•
MATERIAL: NICKEL ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
HEAD STYLE: HEXAGON
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
DEPARTURE FROM CITED DESIGNATOR: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
TECHNICAL CHARACTERISTICS
INTERNAL DRIVE STYLEHEXAGON
THREAD QUANTITY PER INCH13
MATERIALNICKEL ALLOY OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DEPARTURE FROM CITED DESIGNATORQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
WIDTH BETWEEN FLATS2.500 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAVI TYPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
FFS86TYPE6InterchangeableGOVERNMENT REGISTRY
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FF-S-86 TYPE VIInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
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60-16-1672InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AES14F500875BB3A11InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
106C7150P49InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5/8-11UNC-2A X 4 1/2 INCHESL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1/2-13UNC-3A X 2 1/2 INCHES?
1/2-13UNC-3A X 2 1/2 INCHES is a STUD,CONTINUOUS THREAD.
What parts can replace 1/2-13UNC-3A X 2 1/2 INCHES?
There are 33 known substitutes for 1/2-13UNC-3A X 2 1/2 INCHES: FFS86TYPE6, FF-S-86 TYPE VI, 60-16-1672 and 30 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1/2-13UNC-3A X 2 1/2 INCHES?
1/2-13UNC-3A X 2 1/2 INCHES is cataloged in the Federal Logistics Information System under NSN 5305-01-302-5219. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: October 2026