The Screw,shoulder, cataloged under National Stock Number 5305-01-142-8397, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 20 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-142-8397 |
| Primary Part Number | 3M958-6D48 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 3.376 INCHES MINIMUM AND 3.406 INCHES MAXIMUM IN |
| Shoulder Length | 2.837 INCHES MINIMUM AND 2.857 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3896 INCHES MINIMUM AND 0.3901 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.366 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.253 INCHES MINIMUM AND 3.293 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.752 INCHES MINIMUM AND 0.762 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 |
|---|---|
| 3M958-6D48 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4049-6D48X | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4049-6D48X | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4049-6D48X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 3M958-6D48 | 5/2 Secondary reference U.S. Government activity |
| HT4049-6D48X | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4049-6D48X | 5/2 Secondary reference U.S. Government activity |
| HT4049-6D48X | 5/9 Secondary reference U.S. Government activity |
| HT4049-6D48X | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-142-8397 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-142-8397 has 3 manufacturer part numbers on file: 3M958-6D48 (The Boeing Company Div Defense), HT4049-6D48X (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4049-6D48X (Hi-Shear Corporation).
Key specifications for 3M958-6D48: Fastener Length: 3.376 INCHES MINIMUM AND 3.406 INCHES MAXIMUM IN; Shoulder Length: 2.837 INCHES MINIMUM AND 2.857 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.3896 INCHES MINIMUM AND 0.3901 INCHES MAXIMUM FIRST SHOULDER IN. 20 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.