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506657 — RETAINER,TURNLOCK FASTENER EJECT

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

506657: RETAINER,TURNLOCK FASTENER EJECT.

RETAINER,TURNLOCK FASTENER EJECT. Key specifications include material: STEEL RECEPTACLE, eyelet_height: 0.312 INCHES NOMINAL IN, surface_treatment: PASSIVATE EJECTOR SPRING, largest_outside_diameter: 0.344 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-054-5262, 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
506657
NSN: 5325-01-054-5262
FSC: 5325 — Fastening Devices
CAGE: 20284 — AIMTRON SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL RECEPTACLE
eyelet_height0.312 INCHES NOMINAL IN
surface_treatmentPASSIVATE EJECTOR SPRING
largest_outside_diameter0.344 INCHES NOMINAL IN
NSN5325-01-054-5262
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 506657 · 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
•
EYELET HEIGHT: 0.312 INCHES NOMINAL IN
•
LARGEST OUTSIDE DIAMETER: 0.344 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE EJECTOR SPRING
•
MATERIAL: STEEL CORROSION RESISTING EJECTOR SPRING
TECHNICAL CHARACTERISTICS
EYELET HEIGHT0.312 INCHES NOMINAL IN
LARGEST OUTSIDE DIAMETER0.344 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE EJECTOR SPRING
SURFACE TREATMENTCHROMATE AND ZINC RECEPTACLE
MATERIALSTEEL CORROSION RESISTING EJECTOR SPRING
MATERIALSTEEL RECEPTACLE
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 2
FN04-03Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
10119204Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 506657?
506657 is a RETAINER,TURNLOCK FASTENER EJECT.
What parts can replace 506657?
There are 2 known substitutes for 506657: FN04-03, 10119204. Substitute compatibility should be verified for your specific system.
What is the NSN for 506657?
506657 is cataloged in the U.S. Government catalog under NSN 5325-01-054-5262. 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.