PartsTable TECHNICAL DATA SHEET

NSN 1005-01-689-6840Government record, cited

Rifle Castle Nut1005-01-689-6840

NSN 1005-01-689-6840 · NIIN 016896840 · Part number 50236544

Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc · FSC 1005 — Guns, Through 30mm · FSG 10 — Weapons · CAGE 3HN73

Government record, cited

NSN 1005-01-689-6840 — this item is cataloged by the U.S. Government under National Stock Number 1005-01-689-6840. Manufacturer of record part number: 50236544.

Also searched as 1005-01-689-6840 · 1005016896840 · NIIN 016896840 · 01-689-6840 · FSC 1005 Guns, Through 30mm · CAGE 3HN73 · 50236544 · 236544

Nearby stock numbers ← 1005-01-689-6743 Brush, Cleaning, Small Arms · 1005-01-689-6853 Rifle Pressure Screw →

Features

Rifle Castle Nut — FSC 1005
1 manufacturer part number on file
Manufacturer of record: Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc

Identification

NSN: 1005-01-689-6840
NIIN: 016896840
FSC: 1005 — Guns, Through 30mm
FSG: 10 — Weapons
Primary part number: 50236544
Manufacturer: Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc

General Description

The Rifle Castle Nut, cataloged under National Stock Number 1005-01-689-6840, is classified within Federal Supply Class 1005 (Guns, Through 30mm) of the Weapons group. The manufacturer of record is Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Catalog Facts

Item Name	Rifle Castle Nut
FSC / FSG	1005 — Guns, Through 30mm (FSG 10)
Manufacturers	Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc (CAGE 3HN73)

Technical Specifications

Parameter	Value
NSN	1005-01-689-6840
Primary Part Number	50236544
Item Name	Rifle Castle Nut
FSC / FSG	1005 / 10 — Guns, Through 30mm
Manufacturer	Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
50236544 PRIMARY	Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc (USA)

Reference documents

Reference	Meaning
236544	5/9 Secondary reference Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc

No interchangeability data on file.

Other items in FSC 1005 — Guns, Through 30mm

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

1005-00-000-0061

MACHINE GUN,7.62 MILLIMETER

1005-00-001-2676

FILTER,GUN DRIVE

1005-00-001-5589

1005-00-001-5589 · Item name not on file

1005-00-002-0996

1005-00-002-0996 · Item name not on file

1005-00-003-1073

STOP,CARTRIDGE

1005-00-003-2251

1005-00-003-2251 · Item name not on file

1005-00-003-2267

1005-00-003-2267 · Item name not on file

1005-00-003-2268

1005-00-003-2268 · Item name not on file

Frequently Asked Questions

What is NSN 1005-01-689-6840?

NSN 1005-01-689-6840 is a Rifle Castle Nut, manufactured by Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc, classified under FSC 1005, Guns, Through 30mm. Status: active.

What part numbers are listed for NSN 1005-01-689-6840?

NSN 1005-01-689-6840 has 1 manufacturer part number on file: 50236544 (Heckler & Koch Defense Inc Dba Hkd Div Heckler and Koch Defense Inc).

Is NSN 1005-01-689-6840 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.

What is the DEMIL code for NSN 1005-01-689-6840?

NSN 1005-01-689-6840 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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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