The Stud,self-Locking, cataloged under National Stock Number 5307-01-323-5633, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing Corp. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5307-01-323-5633 |
| Primary Part Number | HFHB-0420-8ES |
| Item Name | Stud,self-Locking |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Thread Length | 0.375 INCHES NOMINAL NUT THREAD IN |
| Style Designator | SELF-LOCKING |
| Material Document and Classification | CDA 510 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Head Length | 0.050 INCHES NOMINAL IN |
| Locking Feature | SELF-CLINCHING HEAD |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 20 NUT THREAD |
| Material | COPPER ALLOY 510 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) NUT THREAD |
| Head Diameter | 0.370 INCHES MINIMUM AND 0.390 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 |
|---|---|
| HFHB-0420-8ES PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| 6099059-1 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5307-01-323-5633 is a Stud,self-Locking, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-323-5633 has 1 manufacturer part number on file: HFHB-0420-8ES (Penn Engineering & Manufacturing Corp).
Key specifications for HFHB-0420-8ES: Thread Length: 0.375 INCHES NOMINAL NUT THREAD IN; Style Designator: SELF-LOCKING; Material Document and Classification: CDA 510 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN. 12 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.