Screw, Close Tolerance5305-01-663-6988

NSN 5305-01-663-6988 · NIIN 016636988

FSC 5305 — Screws · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5305-01-663-6988 · 5305016636988 · NIIN 016636988 · 01-663-6988 · FSC 5305 Screws

Nearby stock numbers ← 5305-01-663-6975 Screw, Close Tolerance · 5305-01-663-6994 Screw, Machine →

5305-01-663-6988 — Screws

Features

Screw,close Tolerance — FSC 5305
Head Height: 0.057 INCHES NOMINAL IN
Fastener Length: 1.091 INCHES NOMINAL IN
Thread Length: 0.403 INCHES NOMINAL IN
Nominal Thread Diameter: 0.250 INCHES IN
Head Style: FLUSH
Thread Direction: RIGHT-HAND
Grip Length: 0.688 INCHES NOMINAL IN

Identification

NSN: 5305-01-663-6988
NIIN: 016636988
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives

General Description

The Screw,close Tolerance, cataloged under National Stock Number 5305-01-663-6988, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5305-01-663-6988
Item Name	Screw,close Tolerance
FSC / FSG	5305 / 53 — Screws
Status	ACTIVE
Head Height	0.057 INCHES NOMINAL IN
Fastener Length	1.091 INCHES NOMINAL IN
Thread Length	0.403 INCHES NOMINAL IN
Nominal Thread Diameter	0.250 INCHES IN
Head Style	FLUSH
Thread Direction	RIGHT-HAND
Grip Length	0.688 INCHES NOMINAL IN
Grip Diameter	0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN
Internal Drive Style	TORQUE-SET RIBBED
Thread Class	3A A
Thread Quantity Per Inch	28
Material	TITANIUM ALLOY UNS R56400 OVERALL
Thread Series Designator	UNIFIED NATIONAL JOINT FINE (UNJF)
Head Diameter	0.399 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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
NAS1581V4R11X	3/2 Design control — primary reference U.S. Government activity

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 5305-01-663-6988?

NSN 5305-01-663-6988 is a Screw,close Tolerance, classified under FSC 5305, Screws. Status: active.

What are the specifications of 5305-01-663-6988?

Key specifications for 5305-01-663-6988: Head Height: 0.057 INCHES NOMINAL IN; Fastener Length: 1.091 INCHES NOMINAL IN; Thread Length: 0.403 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN. 14 specifications are documented in the U.S. Government catalog.

Is NSN 5305-01-663-6988 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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