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1550121-2 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1550121-2: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, nut_style: ROUND, nut_diameter: 1.000 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 1.000 INCHES NOMINAL IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-496-0835, 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
1550121-2
NSN: 5310-00-496-0835
FSC: 5310 — Nuts and Washers
CAGE: 7EK50 — TEXTRON AVIATION INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
nut_styleROUND
nut_diameter1.000 INCHES NOMINAL IN
thread_class3B
nut_thickness1.000 INCHES NOMINAL IN
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.820 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
drilled_hole_diameter0.062 INCHES NOMINAL IN
hole_type_and_quantity1 DRILLED
hole_configuration_styleCONFIGURATION G
NSN5310-00-496-0835
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1550121-2 · 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: 0.820 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
HOLE CONFIGURATION STYLE: CONFIGURATION G
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
NUT DIAMETER: 1.000 INCHES NOMINAL IN
•
NUT THICKNESS: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.820 INCHES NOMINAL IN
THREAD SERIESUNF
HOLE CONFIGURATION STYLECONFIGURATION G
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
NUT DIAMETER1.000 INCHES NOMINAL IN
NUT THICKNESS1.000 INCHES NOMINAL IN
DRILLED HOLE DIAMETER0.062 INCHES NOMINAL IN
NUT STYLEROUND
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1550121-2?
1550121-2 is a NUT,PLAIN,ROUND.
What is the NSN for 1550121-2?
1550121-2 is cataloged in the U.S. Government catalog under NSN 5310-00-496-0835. 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.