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6643176-081 — STUD,SHOULDERED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6643176-081: STUD,SHOULDERED.

The STUD,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A STUD THREAD A, thread_length: 2.250 INCHES NOMINAL STUD THREAD IN, overall_length: 8.250 INCHES NOMINAL IN, surface_finish: 32.00 MICROINCHES SHANK, shoulder_length: 2.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-270-1207, 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
6643176-081
NSN: 5307-01-270-1207
FSC: 5307 — Studs
CAGE: 01289 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A STUD THREAD A
thread_length2.250 INCHES NOMINAL STUD THREAD IN
overall_length8.250 INCHES NOMINAL IN
surface_finish32.00 MICROINCHES SHANK
shoulder_length2.500 INCHES NOMINAL IN
style_designatorSHOULDERED
thread_directionRIGHT-HAND NUT THREAD
shoulder_diameter1.562 INCHES NOMINAL IN
nominal_thread_size1.500 INCHES STUD THREAD IN
nut_end_shank_length0.375 INCHES NOMINAL IN
stud_end_shank_length0.375 INCHES NOMINAL IN
NSN5307-01-270-1207
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6643176-081 · 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
•
SURFACE FINISH: 32.00 MICROINCHES SHANK
•
NUT END SHANK DIAMETER: 1.313 INCHES NOMINAL IN
•
THREAD LENGTH: 2.250 INCHES NOMINAL NUT THREAD IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: C50A-400-B16 CABEC 01289 MFR REF SINGLE MATERIAL RESPONSE
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.00 MICROINCHES SHANK
NUT END SHANK DIAMETER1.313 INCHES NOMINAL IN
THREAD LENGTH2.250 INCHES NOMINAL NUT THREAD IN
THREAD LENGTH2.250 INCHES NOMINAL STUD THREAD IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONC50A-400-B16 CABEC 01289 MFR REF SINGLE MATERIAL RESPONSE
OVERALL LENGTH8.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE1.500 INCHES NUT THREAD IN
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 1
571L364 ITEM 874Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6643176-081?
6643176-081 is a STUD,SHOULDERED.
What parts can replace 6643176-081?
There is 1 known substitute for 6643176-081: 571L364 ITEM 874. Substitute compatibility should be verified for your specific system.
What is the NSN for 6643176-081?
6643176-081 is cataloged in the U.S. Government catalog under NSN 5307-01-270-1207. 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.