Nut, Self-Locking, Castellated, Hex5310-01-562-1258

NSN 5310-01-562-1258 · NIIN 015621258 · Part number 90566A265

Mcmaster-Carr Supply Co · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 39428

Government record, cited

NSN 5310-01-562-1258 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-562-1258. Manufacturer of record part number: 90566A265.

Also searched as 5310-01-562-1258 · 5310015621258 · NIIN 015621258 · 01-562-1258 · FSC 5310 Nuts and Washers · CAGE 39428 · 90566A265

Nearby stock numbers ← 5310-01-562-1244 Nut, Self-Locking, Hexagon · 5310-01-562-1259 Washer, Flat →

5310-01-562-1258 — Nuts and Washers

Features

Nut,self-Locking,castellated,hex — FSC 5310
Width Across Flats: 1.812 INCHES NOMINAL IN
Thread Series: UNF
Thread Direction: RIGHT-HAND
Nominal Thread Size: 1.250 INCHES IN
Nut Height: 0.750 INCHES NOMINAL IN
Surface Treatment: ZINC NUT
Nut Style: CASTELLATED, HEXAGON

Identification

NSN: 5310-01-562-1258
NIIN: 015621258
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 90566A265
Manufacturer: Mcmaster-Carr Supply Co

General Description

The Nut,self-Locking,castellated,hex, cataloged under National Stock Number 5310-01-562-1258, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-562-1258
Primary Part Number	90566A265
Item Name	Nut,self-Locking,castellated,hex
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Mcmaster-Carr Supply Co
Status	ACTIVE
Width Across Flats	1.812 INCHES NOMINAL IN
Thread Series	UNF
Thread Direction	RIGHT-HAND
Nominal Thread Size	1.250 INCHES IN
Nut Height	0.750 INCHES NOMINAL IN
Surface Treatment	ZINC NUT
Nut Style	CASTELLATED, HEXAGON
Thread Quantity Per Inch	12
Material	STEEL NUT
Material	PLASTIC POLYAMIDE NYLON LOCKING INSERT

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

Part Number	Manufacturer
90566A265 PRIMARY	Mcmaster-Carr Supply Co (USA)

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 5310-01-562-1258?

NSN 5310-01-562-1258 is a Nut,self-Locking,castellated,hex, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-562-1258?

NSN 5310-01-562-1258 has 1 manufacturer part number on file: 90566A265 (Mcmaster-Carr Supply Co).

What are the specifications of 90566A265?

Key specifications for 90566A265: Width Across Flats: 1.812 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 1.250 INCHES IN. 10 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-562-1258 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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