Nonmachine Nominal Thread Diameter: 0.138 INCHES IN
Fastener Length: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Head Style: FLAT COUNTERSUNK
Internal Drive Style: CROSS RECESS TYPE 1
Countersink Angle: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
Material: STEEL COMP 410 OVERALL
Head Diameter: 0.249 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
Identification
NSN: 5305-01-185-3620
NIIN: 011853620
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives
General Description
The Screw,tapping, cataloged under National Stock Number 5305-01-185-3620, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
5305-01-185-3620
Item Name
Screw,tapping
FSC / FSG
5305 / 53 — Screws
Status
ACTIVE
Nonmachine Nominal Thread Diameter
0.138 INCHES IN
Fastener Length
0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Head Style
FLAT COUNTERSUNK
Internal Drive Style
CROSS RECESS TYPE 1
Countersink Angle
80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
Material
STEEL COMP 410 OVERALL
Head Diameter
0.249 INCHES MINIMUM AND 0.279 INCHES MAXIMUM 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
AN531C6RF10
2/2Government specification standardization
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.
5305-00-000-0094
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 5305-01-185-3620?
NSN 5305-01-185-3620 is a Screw,tapping, classified under FSC 5305, Screws. Status: active.
What are the specifications of 5305-01-185-3620?
Key specifications for 5305-01-185-3620: Nonmachine Nominal Thread Diameter: 0.138 INCHES IN; Fastener Length: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Head Style: FLAT COUNTERSUNK; Internal Drive Style: CROSS RECESS TYPE 1. 7 specifications are documented in the U.S. Government catalog.
Is NSN 5305-01-185-3620 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.