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ST9M449-331 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST9M449-331: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: SPECIAL, usage_design: INTERNAL, inside_diameter: 3.074 INCHES MINIMUM AND 3.084 INCHES MAXIMUM IN, major_thickness: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN, strength_rating: ERR-060, outside_diameter: 3.440 INCHES MINIMUM AND 3.470 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-174-3262, 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
ST9M449-331
NSN: 5325-01-174-3262
FSC: 5325 — Fastening Devices
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 1070 OR STEEL COMP 1074 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
ring_styleSPECIAL
usage_designINTERNAL
inside_diameter3.074 INCHES MINIMUM AND 3.084 INCHES MAXIMUM IN
major_thickness0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
strength_ratingERR-060
outside_diameter3.440 INCHES MINIMUM AND 3.470 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleRECTANGULAR
surface_treatment_document_and_classificationQQ-P-416, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
NSN5325-01-174-3262
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST9M449-331 · 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: INTERNAL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
•
STRENGTH RATING: ERR-060
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1070 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1074 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1078 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1080 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 8TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 3.440 INCHES MINIMUM AND 3.470 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 3.074 INCHES MINIMUM AND 3.084 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
STRENGTH RATINGERR-060
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1070 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1074 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1078 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1080 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 8TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER3.440 INCHES MINIMUM AND 3.470 INCHES MAXIMUM IN
MAJOR THICKNESS0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
INSIDE DIAMETER3.074 INCHES MINIMUM AND 3.084 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL
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 1
UR-331CD-M9Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST9M449-331?
ST9M449-331 is a RING,RETAINING.
What parts can replace ST9M449-331?
There is 1 known substitute for ST9M449-331: UR-331CD-M9. Substitute compatibility should be verified for your specific system.
What is the NSN for ST9M449-331?
ST9M449-331 is cataloged in the U.S. Government catalog under NSN 5325-01-174-3262. 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.