Width Across Flats: 0.607 MILLIMETERS MINIMUM AND 0.627 MILLIMETERS MAXIMUM MM
Thread Series: UNF
Nominal Thread Size: 0.3750 INCHES IN
Nut Height: 0.239 MILLIMETERS MINIMUM AND 0.257 MILLIMETERS MAXIMUM MM
Surface Treatment: NICKEL OVERALL
Nut Style: HEXAGON
Thread Class: 2B
Identification
NSN: 5310-01-721-4529
NIIN: 017214529
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
General Description
The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-721-4529, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
5310-01-721-4529
Item Name
Nut,plain,hexagon
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Width Across Flats
0.607 MILLIMETERS MINIMUM AND 0.627 MILLIMETERS MAXIMUM MM
Thread Series
UNF
Nominal Thread Size
0.3750 INCHES IN
Nut Height
0.239 MILLIMETERS MINIMUM AND 0.257 MILLIMETERS MAXIMUM MM
Surface Treatment
NICKEL OVERALL
Nut Style
HEXAGON
Thread Class
2B
Thread Quantity Per Inch
24
Material
COPPER ALLOY OVERALL
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
MS35650-3385N
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file
Frequently Asked Questions
What is NSN 5310-01-721-4529?
NSN 5310-01-721-4529 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
What are the specifications of 5310-01-721-4529?
Key specifications for 5310-01-721-4529: Width Across Flats: 0.607 MILLIMETERS MINIMUM AND 0.627 MILLIMETERS MAXIMUM MM; Thread Series: UNF; Nominal Thread Size: 0.3750 INCHES IN; Nut Height: 0.239 MILLIMETERS MINIMUM AND 0.257 MILLIMETERS MAXIMUM MM. 9 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-721-4529 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.