The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-341-4702, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Barnhill Bolt Co., Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-341-4702 |
| Primary Part Number | 81-58-114-80 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Barnhill Bolt Co., Inc. |
| Status | ACTIVE |
| Head Height | 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN |
| Fastener Length | 1.172 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 1.031 INCHES NOMINAL IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | SAE J429 GR5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 81-58-114-80 | Barnhill Bolt Co., Inc. (USA) |
| Reference | Meaning |
|---|---|
| 51-58-114-50 | 3/9 Design control — primary reference Barnhill Bolt Co., Inc. |
| 271581 | 5/9 Secondary reference R. H. Sheppard Co., Inc. Dba Sheppard |
NSN 5305-01-341-4702 is a Screw,cap,hexagon Head, manufactured by Barnhill Bolt Co., Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-341-4702 has 1 manufacturer part number on file: 81-58-114-80 (Barnhill Bolt Co., Inc.).
Key specifications for 81-58-114-80: Head Height: 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN; Fastener Length: 1.172 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Thread Length: 1.031 INCHES NOMINAL IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL. 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.