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6643220 PIECE 1 — STUD,SHOULDERED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6643220 PIECE 1: STUD,SHOULDERED.

The STUD,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL, thread_length: 1.375 INCHES NOMINAL STUD THREAD IN, overall_length: 6.250 INCHES NOMINAL IN, hardness_rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM, shoulder_length: 1.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND STUD THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-136-5307, 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
6643220 PIECE 1
NSN: 5307-01-136-5307
FSC: 5307 — Studs
CAGE: 01289 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL
thread_length1.375 INCHES NOMINAL STUD THREAD IN
overall_length6.250 INCHES NOMINAL IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
shoulder_length1.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND STUD THREAD
shoulder_diameter1.062 INCHES NOMINAL IN
nominal_thread_size1.000 INCHES NUT THREAD IN
nut_end_shank_length1.125 INCHES NOMINAL IN
stud_end_shank_length0.375 INCHES NOMINAL IN
nut_end_shank_diameter0.812 INCHES NOMINAL IN
stud_end_shank_diameter0.812 INCHES NOMINAL IN
NSN5307-01-136-5307
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6643220 PIECE 1 · 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
•
NUT END SHANK DIAMETER: 0.812 INCHES NOMINAL IN
•
THREAD LENGTH: 1.375 INCHES NOMINAL STUD THREAD IN
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 1.000 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
NUT END SHANK DIAMETER0.812 INCHES NOMINAL IN
THREAD LENGTH1.375 INCHES NOMINAL STUD THREAD IN
THREAD LENGTH1.375 INCHES NOMINAL NUT THREAD IN
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
OVERALL LENGTH6.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE1.000 INCHES STUD THREAD IN
NOMINAL THREAD SIZE1.000 INCHES NUT THREAD IN
SHOULDER DIAMETER1.062 INCHES NOMINAL 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

No substitute or cross-reference records for this part.

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 6643220 PIECE 1?
6643220 PIECE 1 is a STUD,SHOULDERED.
What is the NSN for 6643220 PIECE 1?
6643220 PIECE 1 is cataloged in the U.S. Government catalog under NSN 5307-01-136-5307. 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.