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23018178 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

23018178: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include end_style: VERTEX OUTSIDE PERIPHERY, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 1.849 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN, major_thickness: 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN, outside_diameter: 2.139 INCHES MINIMUM AND 2.176 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-217-3076, 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
23018178
NSN: 5325-01-217-3076
FSC: 5325 — Fastening Devices
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
end_styleVERTEX OUTSIDE PERIPHERY
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter1.849 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN
major_thickness0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
outside_diameter2.139 INCHES MINIMUM AND 2.176 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating43.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
NSN5325-01-217-3076
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 23018178 · 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: 43.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
END STYLE: VERTEX OUTSIDE PERIPHERY
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1060 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1064 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1065 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1066 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1069 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1070 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1072 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1074 ASSN STD 8TH MATERIAL RESPONSE OR SAE 1075 ASSN STD 9TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 10TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 11TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 12TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 13TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 14TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 15TH MATERIAL RESPONSE OR SAE 1095 ASSN STD 16TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 2.139 INCHES MINIMUM AND 2.176 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 1.849 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
END STYLEVERTEX OUTSIDE PERIPHERY
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1060 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1064 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1065 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1066 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1069 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1070 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1072 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1074 ASSN STD 8TH MATERIAL RESPONSE OR SAE 1075 ASSN STD 9TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 10TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 11TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 12TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 13TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 14TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 15TH MATERIAL RESPONSE OR SAE 1095 ASSN STD 16TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER2.139 INCHES MINIMUM AND 2.176 INCHES MAXIMUM IN
MAJOR THICKNESS0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN
INSIDE DIAMETER1.849 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
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 23018178?
23018178 is a RING,RETAINING.
What is the NSN for 23018178?
23018178 is cataloged in the U.S. Government catalog under NSN 5325-01-217-3076. 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.