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PartsTable / COMPONENT / CB27657-007
CB27657-007 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, nominal_thread_diameter: 0.3125 INCHES IN, thread_quantity_per_inch: 18, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-398-9598, 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
CB27657-007
NSN: 5305-01-398-9598
FSC: 5305
CAGE: 07270 — MOOG INC. DBA AMPAC-ISP CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
nominal_thread_diameter0.3125 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-398-9598
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: CB27657-007 · 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 QUANTITY PER INCH: 18
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
•
HEAD STYLE: HEXAGON
•
NOMINAL THREAD DIAMETER: 0.3125 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH18
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
HEAD STYLEHEXAGON
NOMINAL THREAD DIAMETER0.3125 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
S8023Interchangeable
interchangeable cross-reference
interchangeable
FC5106Interchangeable
interchangeable cross-reference
interchangeable
31313Interchangeable
interchangeable cross-reference
interchangeable
24141Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-296 TY3SEAInterchangeable
interchangeable cross-reference
interchangeable
7252Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CB27657-007?
CB27657-007 is a SCREW,CAP,SOCKET HEAD.
What parts can replace CB27657-007?
There are 13 known substitutes for CB27657-007: S8023, FC5106, 31313 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CB27657-007?
CB27657-007 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-398-9598. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026