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6521-90-702-5102 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6521-90-702-5102: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: ROUND W/WRENCH FLATS CHAMFERED, head_height: 0.370 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 2.000 INCHES NOMINAL IN, thread_length: 0.445 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-131-8451, 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
6521-90-702-5102
NSN: 5306-01-131-8451
FSC: 5306 — Bolts
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleROUND W/WRENCH FLATS CHAMFERED
head_height0.370 INCHES NOMINAL IN
thread_class3A A
head_diameter2.000 INCHES NOMINAL IN
thread_length0.445 INCHES NOMINAL IN
fastener_length3.400 INCHES NOMINAL IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
width_between_flats1.500 INCHES NOMINAL IN
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch16
NSN5306-01-131-8451
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6521-90-702-5102 · 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
•
HEAD HEIGHT: 0.370 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.400 INCHES NOMINAL IN
•
THREAD LENGTH: 0.445 INCHES NOMINAL IN
•
HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000,4340 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: ROUND W/WRENCH FLATS CHAMFERED
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.370 INCHES NOMINAL IN
FASTENER LENGTH3.400 INCHES NOMINAL IN
THREAD LENGTH0.445 INCHES NOMINAL IN
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000,4340 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEROUND W/WRENCH FLATS CHAMFERED
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS1.500 INCHES NOMINAL IN
THREAD CLASS3A A
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
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 6521-90-702-5102?
6521-90-702-5102 is a BOLT,SHOULDER.
What is the NSN for 6521-90-702-5102?
6521-90-702-5102 is cataloged in the U.S. Government catalog under NSN 5306-01-131-8451. This indicates validated use in U.S. government and defense supply chains.
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