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74A551109-2001 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

74A551109-2001: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, nut_style: HEXAGON, nut_height: 0.440 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNJEF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-159-8560, 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
74A551109-2001
NSN: 5310-01-159-8560
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
nut_styleHEXAGON
nut_height0.440 INCHES NOMINAL IN
thread_class3B
thread_seriesUNJEF
thread_directionRIGHT-HAND
countersink_angle90.0 DEGREES NOMINAL BOTH ENDS
width_across_flats1.250 INCHES NOMINAL IN
nominal_thread_size0.875 INCHES IN
bearing_surface_typeCHAMFERED
drilled_hole_diameter0.070 INCHES NOMINAL IN
hole_type_and_quantity3 DRILLED
NSN5310-01-159-8560
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 74A551109-2001 · 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: 1.250 INCHES NOMINAL IN
•
THREAD SERIES: UNJEF
•
HOLE CONFIGURATION STYLE: CONFIGURATION B
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-200/3,T3511 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.875 INCHES IN
•
NUT HEIGHT: 0.440 INCHES NOMINAL IN
•
DRILLED HOLE DIAMETER: 0.070 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.250 INCHES NOMINAL IN
THREAD SERIESUNJEF
HOLE CONFIGURATION STYLECONFIGURATION B
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/3,T3511 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.875 INCHES IN
NUT HEIGHT0.440 INCHES NOMINAL IN
DRILLED HOLE DIAMETER0.070 INCHES NOMINAL IN
COUNTERSINK ANGLE90.0 DEGREES NOMINAL BOTH ENDS
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
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

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 74A551109-2001?
74A551109-2001 is a NUT,PLAIN,HEXAGON.
What is the NSN for 74A551109-2001?
74A551109-2001 is cataloged in the U.S. Government catalog under NSN 5310-01-159-8560. 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.