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645819PC3 — STUD,SHOULDERED AND STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

645819PC3: STUD,SHOULDERED AND STEPPED.

The STUD,SHOULDERED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303, thread_class: 3A STUD THREAD A, thread_length: 0.313 INCHES NOMINAL STUD THREAD IN, thread_direction: RIGHT-HAND NUT THREAD, nominal_thread_size: 0.312 INCHES STUD THREAD IN, thread_quantity_per_inch: 24 STUD THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-271-5550, 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
645819PC3
NSN: 5307-00-271-5550
FSC: 5307 — Studs
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 303
thread_class3A STUD THREAD A
thread_length0.313 INCHES NOMINAL STUD THREAD IN
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.312 INCHES STUD THREAD IN
thread_quantity_per_inch24 STUD THREAD
thread_series_designatorUNF STUD THREAD
material_document_and_classificationMIL-S-853,CL 7 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5307-00-271-5550
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 645819PC3 · 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
•
THREAD LENGTH: 0.313 INCHES NOMINAL STUD THREAD IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-853,CL 7 MIL SPEC SINGLE MATERIAL RESPONSE
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.250 INCHES NUT THREAD IN
•
THREAD CLASS: 3A NUT THREAD A
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.313 INCHES NOMINAL STUD THREAD IN
THREAD LENGTH0.594 INCHES MAXIMUM NUT THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-853,CL 7 MIL SPEC SINGLE MATERIAL RESPONSE
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD IN
NOMINAL THREAD SIZE0.312 INCHES STUD THREAD IN
THREAD CLASS3A NUT THREAD A
THREAD CLASS3A STUD THREAD A
THREAD QUANTITY PER INCH24 STUD THREAD
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 645819PC3?
645819PC3 is a STUD,SHOULDERED AND STEPPED.
What is the NSN for 645819PC3?
645819PC3 is cataloged in the U.S. Government catalog under NSN 5307-00-271-5550. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.