NSN 5305-01-491-8991 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-491-8991. Manufacturer of record part number: 6238A1.
Also searched as5305-01-491-8991 ·
5305014918991 ·
NIIN 014918991 ·
01-491-8991 ·
FSC 5305 Screws · CAGE 2W033 · 6238A1
Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
1 manufacturer part number on file
Manufacturer of record: Dytran Instruments, Inc. Dba Dytran Instruments Inc
Identification
NSN: 5305-01-491-8991
NIIN: 014918991
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives
Primary part number: 6238A1
Manufacturer: Dytran Instruments, Inc. Dba Dytran Instruments Inc
General Description
The Screw,panel Fastener, cataloged under National Stock Number 5305-01-491-8991, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Dytran Instruments, Inc. Dba Dytran Instruments Inc. Government technical data includes 5 specifications, 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5305-01-491-8991
Primary Part Number
6238A1
Item Name
Screw,panel Fastener
FSC / FSG
5305 / 53 — Screws
Manufacturer
Dytran Instruments, Inc. Dba Dytran Instruments Inc
Dytran Instruments, Inc. Dba Dytran Instruments Inc (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.
5305-00-000-0094
SCREW,CLOSE TOLERANCE
5305-00-000-0094
SCREW,CLOSE TOLERANCE
5305-00-000-0094
SCREW,CLOSE TOLERANCE
5305-00-000-1397
5305-00-000-1397 · Item name not on file
5305-00-000-2625
5305-00-000-2625 · Item name not on file
5305-00-000-3669
5305-00-000-3669 · Item name not on file
5305-00-000-3830
5305-00-000-3830 · Item name not on file
5305-00-000-3831
5305-00-000-3831 · Item name not on file
Frequently Asked Questions
What is NSN 5305-01-491-8991?
NSN 5305-01-491-8991 is a Screw,panel Fastener, manufactured by Dytran Instruments, Inc. Dba Dytran Instruments Inc, classified under FSC 5305, Screws. Status: active.
What part numbers are listed for NSN 5305-01-491-8991?
NSN 5305-01-491-8991 has 1 manufacturer part number on file: 6238A1 (Dytran Instruments, Inc. Dba Dytran Instruments Inc).
What are the specifications of 6238A1?
Key specifications for 6238A1: Nominal Thread Diameter: 0.164 INCHES IN; Special Features: SOCKET HEAD CAP MOUNTING SCREW; LOCKWIRE HOLES; Thread Class: 2A A; Thread Quantity Per Inch: 32. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5305-01-491-8991 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.