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CB27657-020 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

CB27657-020: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include thread_class: 3A A, fastener_length: 1.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.312 INCHES IN, thread_quantity_per_inch: 18, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5306-01-486-3308, 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
CB27657-020
NSN: 5306-01-486-3308
FSC: 5306 — Bolts
CAGE: 07270 — MOOG INC. DBA AMPAC-ISP CORP (USA)
SPECIFICATIONS
thread_class3A A
fastener_length1.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.312 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-01-486-3308
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: CB27657-020 · 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
•
FASTENER LENGTH: 1.500 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 18
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.500 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A A
THREAD QUANTITY PER INCH18
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SUBSTITUTES & CROSS-REFERENCES 2
170-41715 ITEM 21Reference document
Same NSN cross-reference
Reference document — Secondary reference
31326Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CB27657-020?
CB27657-020 is a BOLT,INTERNAL WRENCHING.
What parts can replace CB27657-020?
There are 2 known substitutes for CB27657-020: 170-41715 ITEM 21, 31326. Substitute compatibility should be verified for your specific system.
What is the NSN for CB27657-020?
CB27657-020 is cataloged in the U.S. Government catalog under NSN 5306-01-486-3308. 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.