The Stud,self-Locking, cataloged under National Stock Number 5307-00-905-3146, 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 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-905-3146 |
| Primary Part Number | FHS-256-6 |
| Item Name | Stud,self-Locking |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Thread Length | 0.335 INCHES NOMINAL NUT THREAD IN |
| Style Designator | SELF-LOCKING |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.086 INCHES NUT THREAD IN |
| Head Length | 0.040 INCHES NOMINAL IN |
| Locking Feature | HEAD DISTORTIONS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 56 NUT THREAD |
| Material | STEEL COMP 305 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) NUT THREAD |
| Head Diameter | 0.156 INCHES NOMINAL 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 |
|---|---|
| 540459-016C | Bastogi Sistemi Spa (ITA) |
| FHS-256-6 PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| 540459-016C | Leonardo S.p.a. Security & Information System Division (ITA) |
| Reference | Meaning |
|---|---|
| VH844201-3 | 5/9 Secondary reference U.S. Government activity |
| 38610-3 | 7/2 Vendor item drawing reference U.S. Government activity |
| 16600755-022 | 5/9 Secondary reference Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services |
| CHS-256-6 | 5/9 Secondary reference Captive Fasteners Corp |
| 419279-42 | 5/9 Secondary reference U.S. Government activity |
| KTS-256-6 | 5/9 Secondary reference John Crane, Inc |
| 7901640-3 | 7/2 Vendor item drawing reference U.S. Government activity |
| 7735285P76 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms |
NSN 5307-00-905-3146 is a Stud,self-Locking, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-905-3146 has 3 manufacturer part numbers on file: 540459-016C (Bastogi Sistemi Spa), FHS-256-6 (Penn Engineering & Manufacturing Corp), 540459-016C (Leonardo S.p.a. Security & Information System Division).
Key specifications for FHS-256-6: Thread Length: 0.335 INCHES NOMINAL NUT THREAD IN; Style Designator: SELF-LOCKING; Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 0.375 INCHES NOMINAL IN. 13 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.