Nut, Self-Locking, Extended Washer5310-01-366-3556

NSN 5310-01-366-3556 · NIIN 013663556

FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5310-01-366-3556 · 5310013663556 · NIIN 013663556 · 01-366-3556 · FSC 5310 Nuts and Washers · 5310PL1283795 · 1385789 PIECE 7 · 803-1385789 PIECE 7

Nearby stock numbers ← 5310-01-366-3555 · 5310-01-366-3557 Washer, Flat →

5310-01-366-3556 — Nuts and Washers

Features

Nut,self-Locking,extended Washer — FSC 5310
Width Across Flats: 1.250 INCHES NOMINAL IN
Thread Series: UN
Washer Thickness: 0.500 INCHES NOMINAL IN
Material Document and Classification: ASTM B221 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread Direction: RIGHT-HAND
Nominal Thread Size: 1.750 INCHES IN
Locking Feature: PREVAILING TORQUE ALL METAL DESIGN

Identification

NSN: 5310-01-366-3556
NIIN: 013663556
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-366-3556, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-366-3556
Item Name	Nut,self-Locking,extended Washer
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Width Across Flats	1.250 INCHES NOMINAL IN
Thread Series	UN
Washer Thickness	0.500 INCHES NOMINAL IN
Material Document and Classification	ASTM B221 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread Direction	RIGHT-HAND
Nominal Thread Size	1.750 INCHES IN
Locking Feature	PREVAILING TORQUE ALL METAL DESIGN
Nut Style	HEXAGON
Thread Class	3B
Thread Quantity Per Inch	12
Material	ALUMINUM ALLOY 5052 OVERALL

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
5310PL1283795	6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index
1385789 PIECE 7	3/2 Design control — primary reference U.S. Government activity
803-1385789 PIECE 7	5/2 Secondary reference U.S. Government activity

No interchangeability data on file.

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

5310-00-000-0040 · Item name not on file

5310-00-000-0077

NUT,PLAIN,ROUND

5310-00-000-0079

WASHER,FLAT

5310-00-000-0079

WASHER,FLAT

5310-00-000-1146

5310-00-000-1146 · Item name not on file

5310-00-000-3815

5310-00-000-3815 · Item name not on file

5310-00-000-4532

5310-00-000-4532 · Item name not on file

5310-00-000-4540

5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-366-3556?

NSN 5310-01-366-3556 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-366-3556?

Key specifications for 5310-01-366-3556: Overall Height: 0.625 INCHES NOMINAL IN; Width Across Flats: 1.250 INCHES NOMINAL IN; Thread Series: UN; Washer Thickness: 0.500 INCHES NOMINAL IN. 11 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-366-3556 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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