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3591-7CN656 — INSERT,SCREW THREAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3591-7CN656: INSERT,SCREW THREAD.

The INSERT,SCREW THREAD is a the manufacturer industrial component. Key specifications include length: 0.656 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, insert_size: 0.524 IN. MIN,0.549 IN.

MAX IN, style_designator: COIL. This part is cataloged in the U.S. Government catalog under NSN 5325-00-490-4920, 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
3591-7CN656
NSN: 5325-00-490-4920
FSC: 5325 — Fastening Devices
CAGE: 01556 — STANLEY ENGINEERED FASTENING LLC (USA)
SPECIFICATIONS
length0.656 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
insert_size0.524 IN. MIN,0.549 IN. MAX IN
style_designatorCOIL
NSN5325-00-490-4920
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3591-7CN656 · 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
•
LENGTH: 0.656 INCHES NOMINAL IN
•
INSERT SIZE: 0.524 IN. MIN,0.549 IN. MAX IN
•
STYLE DESIGNATOR: COIL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
LENGTH0.656 INCHES NOMINAL IN
INSERT SIZE0.524 IN. MIN,0.549 IN. MAX IN
STYLE DESIGNATORCOIL
MATERIALSTEEL CORROSION RESISTING OVERALL
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 1
3591-7CN0656Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3591-7CN656?
3591-7CN656 is a INSERT,SCREW THREAD.
What parts can replace 3591-7CN656?
There is 1 known substitute for 3591-7CN656: 3591-7CN0656. Substitute compatibility should be verified for your specific system.
What is the NSN for 3591-7CN656?
3591-7CN656 is cataloged in the U.S. Government catalog under NSN 5325-00-490-4920. 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.