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1771AS187-1 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1771AS187-1: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_series: UNF, surface_treatment: CADMIUM OVERALL, width_across_flats: 1.750 INCHES NOMINAL IN, end_item_identification: SPECIAL ACFT AND ENGINE TOOL AND SUPPORT EQUIPMENT AND PARTS, thread_quantity_per_inch: 14. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-384-4783, 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
1771AS187-1
NSN: 5310-01-384-4783
FSC: 5310 — Nuts and Washers
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_seriesUNF
surface_treatmentCADMIUM OVERALL
width_across_flats1.750 INCHES NOMINAL IN
end_item_identificationSPECIAL ACFT AND ENGINE TOOL AND SUPPORT EQUIPMENT AND PARTS
thread_quantity_per_inch14
NSN5310-01-384-4783
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1771AS187-1 · 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: 1.750 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD QUANTITY PER INCH: 14
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.750 INCHES NOMINAL IN
THREAD SERIESUNF
SURFACE TREATMENTCADMIUM OVERALL
END ITEM IDENTIFICATIONSPECIAL ACFT AND ENGINE TOOL AND SUPPORT EQUIPMENT AND PARTS
THREAD QUANTITY PER INCH14
MATERIALSTEEL OVERALL
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 1771AS187-1?
1771AS187-1 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 1771AS187-1?
1771AS187-1 is cataloged in the U.S. Government catalog under NSN 5310-01-384-4783. 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.