Nut, Self-Locking, Extended Washer5310-01-276-1655

NSN 5310-01-276-1655 · NIIN 012761655

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

Government record, cited

Also searched as 5310-01-276-1655 · 5310012761655 · NIIN 012761655 · 01-276-1655 · FSC 5310 Nuts and Washers · TLGF-5818-5 · 81-A-1630 · 81-A-1630

Nearby stock numbers ← 5310-01-276-1654 Nut, Plain, Round · 5310-01-276-1656 →

5310-01-276-1655 — Nuts and Washers

Features

Nut,self-Locking,extended Washer — FSC 5310
Washer Outside Diameter: 1.280 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN
Width Across Flats: 0.9380 INCHES MINIMUM AND 0.9395 INCHES MAXIMUM IN
Thread Series: UN
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.625 INCHES IN
Locking Feature: PREVAILING TORQUE ALL METAL DESIGN
Surface Treatment: CADMIUM OVERALL

Identification

NSN: 5310-01-276-1655
NIIN: 012761655
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-276-1655, 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11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	5310-01-276-1655
Item Name	Nut,self-Locking,extended Washer
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Washer Outside Diameter	1.280 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN
Width Across Flats	0.9380 INCHES MINIMUM AND 0.9395 INCHES MAXIMUM IN
Thread Series	UN
Thread Direction	RIGHT-HAND
Nominal Thread Size	0.625 INCHES IN
Locking Feature	PREVAILING TORQUE ALL METAL DESIGN
Surface Treatment	CADMIUM OVERALL
Nut Style	HEXAGON
Thread Class	2B
Thread Quantity Per Inch	18
Material	STEEL 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
TLGF-5818-5	3/9 Design control — primary reference U.S. Government activity
81-A-1630	5/9 Secondary reference Naval Air Facility
81-A-1630	7/9 Vendor item drawing reference Naval Ordnance Laboratory

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 5310-01-276-1655?

NSN 5310-01-276-1655 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-276-1655?

Key specifications for 5310-01-276-1655: Overall Height: 0.581 INCHES MINIMUM AND 0.678 INCHES MAXIMUM IN; Washer Outside Diameter: 1.280 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN; Width Across Flats: 0.9380 INCHES MINIMUM AND 0.9395 INCHES MAXIMUM IN; Thread Series: UN. 11 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-276-1655 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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