Nut, Self-Locking, Knurled5310-01-253-7520

NSN 5310-01-253-7520 · NIIN 012537520

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

Government record, cited

Also searched as 5310-01-253-7520 · 5310012537520 · NIIN 012537520 · 01-253-7520 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-01-253-7519 Nut, Plain, Round · 5310-01-253-7521 Washer, Flat →

5310-01-253-7520 — Nuts and Washers

Features

Nut,self-Locking,knurled — FSC 5310
Thread Series: UN
Material Document and Classification: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Direction: RIGHT-HAND
Nominal Thread Size: 1.375 INCHES IN
Nut Diameter: 1.550 INCHES NOMINAL IN
Locking Feature: FREE-RUNNING ALL METAL DESIGN
Nut Thickness: 0.527 INCHES NOMINAL IN

Identification

NSN: 5310-01-253-7520
NIIN: 012537520
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Nut,self-Locking,knurled, cataloged under National Stock Number 5310-01-253-7520, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-253-7520
Item Name	Nut,self-Locking,knurled
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Thread Series	UN
Material Document and Classification	QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Direction	RIGHT-HAND
Nominal Thread Size	1.375 INCHES IN
Nut Diameter	1.550 INCHES NOMINAL IN
Locking Feature	FREE-RUNNING ALL METAL DESIGN
Nut Thickness	0.527 INCHES NOMINAL IN
Surface Treatment	PASSIVATE AND OXIDE OVERALL
Nut Style	KNURLED
Thread Class	2B
Thread Quantity Per Inch	28
Material	STEEL CORROSION RESISTING 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
2001593-1	3/2 Design control — primary 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 5310-01-253-7520?

NSN 5310-01-253-7520 is a Nut,self-Locking,knurled, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-253-7520?

Key specifications for 5310-01-253-7520: Thread Series: UN; Material Document and Classification: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 1.375 INCHES IN. 12 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-253-7520 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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