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18979 — GEAR ASSEMBLY,SPEED DECREASER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

18979: GEAR ASSEMBLY,SPEED DECREASER.

The GEAR ASSEMBLY,SPEED DECREASER is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: ANG CERFP HRF MEDICAL SUPPORT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-053-7804, 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
18979
NSN: 5310-00-053-7804
NIINs: 000537804, 011713380, 015881419
FSC: 5310 — Nuts and Washers
CAGE: 11743 — CHECKER MOTORS CORPORATION (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyANG CERFP HRF MEDICAL SUPPORT
NSN5310-00-053-7804
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 18979 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.480 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: LEFT-HAND
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NUT HEIGHT: 0.875 INCHES NOMINAL IN
•
BALL SEAT RADIUS: 0.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.480 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONLEFT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.875 INCHES NOMINAL IN
BALL SEAT RADIUS0.875 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NUT STYLESINGLE BALL SEAT, HEXAGON
SUBSTITUTES & CROSS-REFERENCES 10
535670Reference document
Same NSN cross-reference
Reference document — Secondary reference
534769Reference document
Same NSN cross-reference
Reference document — Secondary reference
293273Reference document
Same NSN cross-reference
Reference document — Secondary reference
1760-093-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
585193Reference document
Same NSN cross-reference
Reference document — Secondary reference
581275Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 18979?
18979 is a GEAR ASSEMBLY,SPEED DECREASER.
What parts can replace 18979?
There are 10 known substitutes for 18979: 535670, 534769, 293273 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18979?
18979 is cataloged in the U.S. Government catalog under NSN 5310-00-053-7804. 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.