The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-386-8145, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-386-8145 |
| Primary Part Number | 38031E-4C-8 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.1562 INCHES NOMINAL IN |
| Head Height | 0.122 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN |
| Fastener Length | 0.470 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH OR STRIP OR PELLET THREADS |
| Surface Treatment | PASSIVATE FASTENER |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING FASTENER |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Thread Series Designator | UNRC |
| Head Diameter | 0.419 INCHES MINIMUM AND 0.437 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 |
|---|---|
| 38031E-4C-8 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 38031E-4C-8 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| PL5010 ITEM 52 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-386-8145 is a Screw,cap,socket Head, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-386-8145 has 1 manufacturer part number on file: 38031E-4C-8 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 38031E-4C-8: Width Across Flats: 0.1562 INCHES NOMINAL IN; Head Height: 0.122 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN; Fastener Length: 0.470 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER. 17 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.