The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-089-5985, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Cae Usa Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-089-5985 |
| Primary Part Number | H20-18 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Cae Usa Inc. |
| Status | ACTIVE |
| Head Height | 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| Fastener Length | 0.656 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN |
| Thread Length | 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763 TYPE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.281 INCHES MINIMUM AND 0.343 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.281 INCHES MINIMUM AND 0.343 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 |
|---|---|
| H20-18 PRIMARY | Cae Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| H20-18 | 5/9 Secondary reference Raytheon Technical Services Company |
NSN 5305-01-089-5985 is a Screw,externally Relieved Body, manufactured by Cae Usa Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-089-5985 has 1 manufacturer part number on file: H20-18 (Cae Usa Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5930-01-118-9216, 5340-01-579-9135. Verify interchangeability with system specifications before substitution.
Key specifications for H20-18: Head Height: 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Fastener Length: 0.656 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN; Thread Length: 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-763 TYPE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.