The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-027-9510, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Young Corp Affil of Isaacson Steel Co. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-027-9510 |
| Primary Part Number | 1612-21AA |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Young Corp Affil of Isaacson Steel Co |
| Status | ACTIVE |
| Head Height | 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN |
| Fastener Length | 5.000 INCHES NOMINAL IN |
| Thread Length | 1.750 INCHES NOMINAL IN |
| Material Document and Classification | SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 1612-21AA PRIMARY | Young Corp Affil of Isaacson Steel Co (USA) |
NSN 5305-01-027-9510 is a Screw,cap,hexagon Head, manufactured by Young Corp Affil of Isaacson Steel Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-027-9510 has 1 manufacturer part number on file: 1612-21AA (Young Corp Affil of Isaacson Steel Co).
Key specifications for 1612-21AA: Head Height: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN; Fastener Length: 5.000 INCHES NOMINAL IN; Thread Length: 1.750 INCHES NOMINAL IN; Material Document and Classification: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.