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431MK2N — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

431MK2N: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON, end_style: D SHAPE ABOVE INSIDE PERIPHERY, ring_style: ANGULAR CAP, usage_design: EXTERNAL, inside_diameter: 5.349 INCHES NOMINAL IN, major_thickness: 0.093 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-488-4155, 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
431MK2N
NSN: 5325-00-488-4155
FSC: 5325 — Fastening Devices
CAGE: 5F573 — GREENE TWEED & CO INC (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON
end_styleD SHAPE ABOVE INSIDE PERIPHERY
ring_styleANGULAR CAP
usage_designEXTERNAL
inside_diameter5.349 INCHES NOMINAL IN
major_thickness0.093 INCHES NOMINAL IN
outside_diameter5.724 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleRECTANGULAR
NSN5325-00-488-4155
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 431MK2N · 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
•
USAGE DESIGN: EXTERNAL
•
END STYLE: D SHAPE ABOVE INSIDE PERIPHERY
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 5.724 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.093 INCHES NOMINAL IN
•
INSIDE DIAMETER: 5.349 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: ANGULAR CAP
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL
END STYLED SHAPE ABOVE INSIDE PERIPHERY
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER5.724 INCHES NOMINAL IN
MAJOR THICKNESS0.093 INCHES NOMINAL IN
INSIDE DIAMETER5.349 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEANGULAR CAP
MATERIALPLASTIC POLYAMIDE NYLON
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 431MK2N?
431MK2N is a RING,RETAINING.
What is the NSN for 431MK2N?
431MK2N is cataloged in the U.S. Government catalog under NSN 5325-00-488-4155. 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.