PartsTable TECHNICAL DATA SHEET

NSN 5325-01-520-3659Government record, cited

Stud, Turnlock Fastener5325-01-520-3659

NSN 5325-01-520-3659 · NIIN 015203659 · Part number 2501-W20-25-C3C

Southco Inc · FSC 5325 — Fastening Devices · FSG 53 — Hardware and Abrasives · CAGE 72794

Government record, cited

NSN 5325-01-520-3659 — this item is cataloged by the U.S. Government under National Stock Number 5325-01-520-3659. Manufacturer of record part number: 2501-W20-25-C3C.

Also searched as 5325-01-520-3659 · 5325015203659 · NIIN 015203659 · 01-520-3659 · FSC 5325 Fastening Devices · CAGE 72794 · 2501-W20-25-C3C · AW5T25

Nearby stock numbers ← 5325-01-520-3449 Grommet, Nonmetallic · 5325-01-520-3661 Stud, Turnlock Fastener →

Features

Stud,turnlock Fastener — FSC 5325
Material: STEEL OVERALL
1 manufacturer part number on file
Manufacturer of record: Southco Inc

Identification

NSN: 5325-01-520-3659
NIIN: 015203659
FSC: 5325 — Fastening Devices
FSG: 53 — Hardware and Abrasives
Primary part number: 2501-W20-25-C3C
Manufacturer: Southco Inc

General Description

The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-520-3659, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Southco Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5325-01-520-3659
Primary Part Number	2501-W20-25-C3C
Item Name	Stud,turnlock Fastener
FSC / FSG	5325 / 53 — Fastening Devices
Manufacturer	Southco Inc
Status	ACTIVE
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

Part Number	Manufacturer
2501-W20-25-C3C PRIMARY	Southco Inc (USA)

Reference documents

Reference	Meaning
AW5T25	5/9 Secondary reference Southco Inc

No interchangeability data on file.

Other items in FSC 5325 — Fastening Devices

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5325-00-000-1884

5325-00-000-1884 · Item name not on file

5325-00-000-9988

5325-00-000-9988 · Item name not on file

5325-00-001-1567

RING,RETAINING

5325-00-001-2043

FASTENER,PANEL

5325-00-001-3842

RING,RETAINING

5325-00-001-3858

5325-00-001-3858 · Item name not on file

5325-00-001-3871

RING,RETAINING

5325-00-001-4317

RING,RETAINING

Frequently Asked Questions

What is NSN 5325-01-520-3659?

NSN 5325-01-520-3659 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.

What part numbers are listed for NSN 5325-01-520-3659?

NSN 5325-01-520-3659 has 1 manufacturer part number on file: 2501-W20-25-C3C (Southco Inc).

What are the specifications of 2501-W20-25-C3C?

Key specifications for 2501-W20-25-C3C: Special Features: GOES WITH 1/4 TURN STUD; Part Name Assigned by Controlling Agency: WING STUD; End Item Identification: AGUSTA A109 HELICOPTER; Material: STEEL OVERALL. 1 specification is documented in the U.S. Government catalog.

Is NSN 5325-01-520-3659 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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