PartsTable TECHNICAL DATA SHEET
NSN 5310-00-488-8711Government record, cited

Nut, Self-Locking, Internal Wrench5310-00-488-8711

NSN 5310-00-488-8711 · NIIN 004888711 · Part number UWN428
Sps Technologies, Llc Dba PB Fasteners · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 56878
Government record, cited
NSN 5310-00-488-8711 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-488-8711. Manufacturer of record part number: UWN428.
Also searched as  5310-00-488-8711 · 5310004888711 · NIIN 004888711 · 00-488-8711 · FSC 5310 Nuts and Washers · CAGE 56878 · UWN428 · NAS443-4 · 12B048 · 12B048
Nearby stock numbers  ·
Features
  • Nut,self-Locking,internal Wrench — FSC 5310
  • Thread Series: UNF
  • Thread Direction: RIGHT-HAND
  • Nominal Thread Size: 0.250 INCHES IN
  • Nut Diameter: 0.531 INCHES NOMINAL IN
  • Specification/standard Data: 81205-NAS443 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Width Between Flats: 0.375 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN
  • Locking Feature: PREVAILING TORQUE ALL METAL DESIGN
Identification
  • NSN: 5310-00-488-8711
  • NIIN: 004888711
  • FSC: 5310 — Nuts and Washers
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: UWN428
  • Manufacturer: Sps Technologies, Llc Dba PB Fasteners
General Description

The Nut,self-Locking,internal Wrench, cataloged under National Stock Number 5310-00-488-8711, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-488-8711
Primary Part NumberUWN428
Item NameNut,self-Locking,internal Wrench
FSC / FSG5310 / 53 — Nuts and Washers
ManufacturerSps Technologies, Llc Dba PB Fasteners
StatusACTIVE
Thread SeriesUNF
Thread DirectionRIGHT-HAND
Nominal Thread Size0.250 INCHES IN
Nut Diameter0.531 INCHES NOMINAL IN
Specification/standard Data81205-NAS443 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Width Between Flats0.375 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Nut Height0.656 INCHES NOMINAL IN
Surface TreatmentCADMIUM OR ZINC OVERALL
Internal Drive StyleDOUBLE HEXAGON
Nut StyleINTERNAL WRENCHING
Thread Class3B
Thread Quantity Per Inch28
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
UWN428 PRIMARY Sps Technologies, Llc Dba PB Fasteners (USA)
12B048 PRIMARY Esna, Llc (USA)
Reference documents
ReferenceMeaning
NAS443-4 3/2 Design control — primary reference
U.S. Government activity
12B048 5/9 Secondary reference
Harvard Industries Inc
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 5310-00-488-8711?

NSN 5310-00-488-8711 is a Nut,self-Locking,internal Wrench, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-00-488-8711?

NSN 5310-00-488-8711 has 2 manufacturer part numbers on file: UWN428 (Sps Technologies, Llc Dba PB Fasteners), 12B048 (Esna, Llc).

What are the specifications of UWN428?

Key specifications for UWN428: Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES IN; Nut Diameter: 0.531 INCHES NOMINAL IN. 14 specifications are documented in the U.S. Government catalog.

Is NSN 5310-00-488-8711 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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