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AD3M891-9 — NUT,PLAIN,CASTELLATED,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AD3M891-9: NUT,PLAIN,CASTELLATED,HEXAGON.

The NUT,PLAIN,CASTELLATED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-472-3474, 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
AD3M891-9
NSN: 5310-01-472-3474
FSC: 5310 — Nuts and Washers
CAGE: 92595 — NELSON STUD WELDING, INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleCASTELLATED, HEXAGON
nut_height0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
bearing_surface_typeCHAMFERED
thread_pitch_diameters+0.5264 TO 0.5308 INCHES IN
thread_quantity_per_inch18
NSN5310-01-472-3474
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AD3M891-9 · 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: 0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
THREAD PITCH DIAMETERS: +0.5264 TO 0.5308 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5731 ASSN STD ALL MATERIAL RESPONSES OR AMS5732 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.562 INCHES IN
•
NUT HEIGHT: 0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC ALL TREATMENT RESPONSES OVERALL
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD PITCH DIAMETERS+0.5264 TO 0.5308 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5731 ASSN STD ALL MATERIAL RESPONSES OR AMS5732 ASSN STD ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.562 INCHES IN
NUT HEIGHT0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLECASTELLATED, HEXAGON
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 4
79537-918Reference document
Same NSN cross-reference
Reference document — Secondary reference
H52351-9Reference document
Same NSN cross-reference
Reference document — Secondary reference
3M891-9Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
3M891Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AD3M891-9?
AD3M891-9 is a NUT,PLAIN,CASTELLATED,HEXAGON.
What parts can replace AD3M891-9?
There are 4 known substitutes for AD3M891-9: 79537-918, H52351-9, 3M891-9 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AD3M891-9?
AD3M891-9 is cataloged in the U.S. Government catalog under NSN 5310-01-472-3474. This indicates validated use in U.S. government and defense supply chains.
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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.