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MC1929 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MC1929: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302, end_style: 90 DEGREE PARALLEL, ring_style: STRAIGHT GAP, usage_design: INTERNAL, inside_diameter: 1.722 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN, outside_diameter: 1.780 INCHES MINIMUM AND 1.840 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-028-9787, 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
MC1929
NSN: 5325-01-028-9787
FSC: 5325 — Fastening Devices
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 302
end_style90 DEGREE PARALLEL
ring_styleSTRAIGHT GAP
usage_designINTERNAL
inside_diameter1.722 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN
outside_diameter1.780 INCHES MINIMUM AND 1.840 INCHES MAXIMUM IN
material_diameter0.029 INCHES NOMINAL IN
surface_treatmentPASSIVATE
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUND
material_document_and_classificationQQ-W-423, COMP 302, COND B FED SPEC SINGLE MATERIAL RESPONSE
NSN5325-01-028-9787
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MC1929 · 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
•
END STYLE: 90 DEGREE PARALLEL
•
MATERIAL DIAMETER: 0.029 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-423, COMP 302, COND B FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 1.780 INCHES MINIMUM AND 1.840 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 1.722 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
END STYLE90 DEGREE PARALLEL
MATERIAL DIAMETER0.029 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423, COMP 302, COND B FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER1.780 INCHES MINIMUM AND 1.840 INCHES MAXIMUM IN
INSIDE DIAMETER1.722 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
SURFACE TREATMENTPASSIVATE
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 MC1929?
MC1929 is a RING,RETAINING.
What is the NSN for MC1929?
MC1929 is cataloged in the U.S. Government catalog under NSN 5325-01-028-9787. 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.