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6LD18 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6LD18: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: INTERNAL, gap_opening: OPENING 90 DEGREES OR MORE, usage_design: INTERNAL, major_thickness: 0.037 INCHES NOMINAL IN, minor_thickness: 0.033 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-657-3441, 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
6LD18
NSN: 5325-01-657-3441
FSC: 5325 — Fastening Devices
CAGE: 5B5M3 — DEVCOM CHEMICAL BIOLOGICAL CENTER DBA CHEMICAL BIOLOGICAL CENTER DIV U.S. DEPT OF ARMY (USA)
SPECIFICATIONS
materialSTEEL
ring_styleINTERNAL
gap_openingOPENING 90 DEGREES OR MORE
usage_designINTERNAL
major_thickness0.037 INCHES NOMINAL IN
minor_thickness0.033 INCHES NOMINAL IN
strength_ratingERR-060
outside_diameter0.763 INCHES NOMINAL IN
surface_treatmentPHOSPHATE
material_hardness_rating49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM
NSN5325-01-657-3441
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6LD18 · 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
•
MATERIAL HARDNESS RATING: 49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: INTERNAL
•
MINOR THICKNESS: 0.033 INCHES NOMINAL IN
•
STRENGTH RATING: ERR-060
•
OUTSIDE DIAMETER: 0.763 INCHES NOMINAL IN
•
GAP OPENING: OPENING 90 DEGREES OR MORE
•
MAJOR THICKNESS: 0.037 INCHES NOMINAL IN
•
RING STYLE: INTERNAL
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM
USAGE DESIGNINTERNAL
MINOR THICKNESS0.033 INCHES NOMINAL IN
STRENGTH RATINGERR-060
OUTSIDE DIAMETER0.763 INCHES NOMINAL IN
GAP OPENINGOPENING 90 DEGREES OR MORE
MAJOR THICKNESS0.037 INCHES NOMINAL IN
RING STYLEINTERNAL
SURFACE TREATMENTPHOSPHATE
MATERIALSTEEL
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

No substitute or cross-reference records for this part.

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 6LD18?
6LD18 is a RING,RETAINING.
What is the NSN for 6LD18?
6LD18 is cataloged in the U.S. Government catalog under NSN 5325-01-657-3441. 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.