Screw, Cap, Socket Head5305-01-643-6066

NSN 5305-01-643-6066 · NIIN 016436066 · Part number 8591651

Naval Sea Systems Command · FSC 5305 — Screws · FSG 53 — Hardware and Abrasives · CAGE 53711

Government record, cited

NSN 5305-01-643-6066 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-643-6066. Manufacturer of record part number: 8591651.

Also searched as 5305-01-643-6066 · 5305016436066 · NIIN 016436066 · 01-643-6066 · FSC 5305 Screws · CAGE 53711 · 8591651 · 92185A206

Nearby stock numbers ← 5305-01-643-6064 Screw, Shoulder · 5305-01-643-6145 Screw, Machine →

5305-01-643-6066 — Screws

Features

Screw,cap,socket Head — FSC 5305
Width Across Flats: 0.1406 INCHES NOMINAL IN
Head Height: 0.164 INCHES NOMINAL IN
Fastener Length: 1.750 INCHES NOMINAL IN
Thread Length: 1.250 INCHES MINIMUM IN
Hardness Rating: 70.0 ROCKWELL B NOMINAL OVERALL
Nominal Thread Diameter: 0.164 INCHES IN
Head Style: FLAT FILLISTER

Identification

NSN: 5305-01-643-6066
NIIN: 016436066
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives
Primary part number: 8591651
Manufacturer: Naval Sea Systems Command

General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-643-6066, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5305-01-643-6066
Primary Part Number	8591651
Item Name	Screw,cap,socket Head
FSC / FSG	5305 / 53 — Screws
Manufacturer	Naval Sea Systems Command
Status	ACTIVE
Width Across Flats	0.1406 INCHES NOMINAL IN
Head Height	0.164 INCHES NOMINAL IN
Fastener Length	1.750 INCHES NOMINAL IN
Thread Length	1.250 INCHES MINIMUM IN
Hardness Rating	70.0 ROCKWELL B NOMINAL OVERALL
Nominal Thread Diameter	0.164 INCHES IN
Head Style	FLAT FILLISTER
Thread Direction	RIGHT-HAND
Minimum Tensile Strength	70000 POUNDS PER SQUARE INCH LBS
Internal Drive Style	HEXAGON
Thread Class	3A A
Thread Quantity Per Inch	32
Material	STEEL CORROSION RESISTING OVERALL
Thread Series Designator	UNS
Head Diameter	0.270 INCHES NOMINAL IN

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
8591651 PRIMARY	Naval Sea Systems Command (USA)
92185A206	Mcmaster-Carr Supply Co (USA)

No interchangeability data on file.

Other items in FSC 5305 — Screws

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

5305-00-001-5016

5305-00-001-5016 · Item name not on file

5305-00-001-9160

5305-00-001-9160 · Item name not on file

5305-00-001-9629

SCREW,ADJUSTING CLEVIS

5305-00-001-9742

5305-00-001-9742 · Item name not on file

5305-00-001-9768

SCREW,CAP,SOCKET HEAD

5305-00-003-4306

SCREW,MACHINE

5305-00-003-6694

5305-00-003-6694 · Item name not on file

5305-00-003-6753

5305-00-003-6753 · Item name not on file

Frequently Asked Questions

What is NSN 5305-01-643-6066?

NSN 5305-01-643-6066 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.

What part numbers are listed for NSN 5305-01-643-6066?

NSN 5305-01-643-6066 has 2 manufacturer part numbers on file: 8591651 (Naval Sea Systems Command), 92185A206 (Mcmaster-Carr Supply Co).

What are the specifications of 8591651?

Key specifications for 8591651: Width Across Flats: 0.1406 INCHES NOMINAL IN; Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.750 INCHES NOMINAL IN; Thread Length: 1.250 INCHES MINIMUM IN. 15 specifications are documented in the U.S. Government catalog.

Is NSN 5305-01-643-6066 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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