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90665A188 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

90665A188: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include head_height: 0.1875 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.562 INCHES NOMINAL IN, thread_length: 1.50 INCHES NOMINAL IN, hardness_rating: 39.0 ROCKWELL C NOMINAL OVERALL, special_features: ROHS COMPLIANT. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-680-4259, 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
90665A188
NSN: 5305-01-680-4259
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_height0.1875 INCHES NOMINAL IN
thread_class3A A
head_diameter0.562 INCHES NOMINAL IN
thread_length1.50 INCHES NOMINAL IN
hardness_rating39.0 ROCKWELL C NOMINAL OVERALL
special_featuresROHS COMPLIANT
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
head_inside_diameter0.1875 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.375 INCHES IN
thread_quantity_per_inch16
NSN5305-01-680-4259
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 90665A188 · 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 INSIDE DIAMETER: 0.1875 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.1875 INCHES NOMINAL IN
•
THREAD LENGTH: 1.50 INCHES NOMINAL IN
•
HARDNESS RATING: 39.0 ROCKWELL C NOMINAL OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A574 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD INSIDE DIAMETER0.1875 INCHES NOMINAL IN
HEAD HEIGHT0.1875 INCHES NOMINAL IN
THREAD LENGTH1.50 INCHES NOMINAL IN
HARDNESS RATING39.0 ROCKWELL C NOMINAL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A574 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESROHS COMPLIANT
SURFACE TREATMENTZINC OVERALL
INTERNAL DRIVE STYLEHEXAGON
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
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 90665A188?
90665A188 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for 90665A188?
90665A188 is cataloged in the U.S. Government catalog under NSN 5305-01-680-4259. This indicates validated use in U.S. government and defense supply chains.
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