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RRN185 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: INTERNAL, usage_design: INTERNAL, major_thickness: 0.062 INCHES NOMINAL IN, outside_diameter: 1.998 INCHES NOMINAL IN, casehardening_indicator: NOT CASEHARDENED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-403-5213, 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
RRN185
NSN: 5325-00-403-5213
FSC: 5325
CAGE: 80756 — SPIROLOX INC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleINTERNAL
usage_designINTERNAL
major_thickness0.062 INCHES NOMINAL IN
outside_diameter1.998 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED-STD 66,NO. 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-403-5213
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RRN185 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
3000X185STInterchangeable
interchangeable cross-reference
interchangeable
N1300-185Interchangeable
interchangeable cross-reference
interchangeable
S204Interchangeable
interchangeable cross-reference
interchangeable
470.562Interchangeable
interchangeable cross-reference
interchangeable
470562Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RRN185?
RRN185 is a RING,RETAINING.
What parts can replace RRN185?
There are 5 known substitutes for RRN185: 3000X185ST, N1300-185, S204 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RRN185?
RRN185 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-403-5213. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026