The Stud,self-Locking, cataloged under National Stock Number 5307-01-044-0842, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-044-0842 |
| Primary Part Number | GS520L428S8 |
| Item Name | Stud,self-Locking |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SELF-LOCKING |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Locking Feature | SELF-CLINCHING HEAD |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Thread Series Designator | UNF NUT THREAD |
| Head Diameter | 0.312 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| GS520L428S8 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| FHS0428-8 | 5/9 Secondary reference Penn Engineering & Manufacturing Corp |
NSN 5307-01-044-0842 is a Stud,self-Locking, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-044-0842 has 1 manufacturer part number on file: GS520L428S8 (Northrop Grumman Systems Corporation).
Key specifications for GS520L428S8: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SELF-LOCKING; Nominal Thread Size: 0.250 INCHES NUT THREAD IN; Locking Feature: SELF-CLINCHING HEAD. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.