The Screw,machine, cataloged under National Stock Number 5305-01-247-3692, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Spir-L-Ok Industries Canada Ltdcanada Culvert. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-247-3692 |
| Primary Part Number | B4021700 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Spir-L-Ok Industries Canada Ltdcanada Culvert |
| Status | ACTIVE |
| Head Height | 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Thread Length | 0.480 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.250 INCHES NOMINAL IN |
| Screw Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| B4021700 PRIMARY | Spir-L-Ok Industries Canada Ltdcanada Culvert (CAN) |
| Reference | Meaning |
|---|---|
| B4021700 | 3/9 Design control — primary reference Department of the Army Hq United States Army Communications Research and Development Command |
NSN 5305-01-247-3692 is a Screw,machine, manufactured by Spir-L-Ok Industries Canada Ltdcanada Culvert, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-247-3692 has 1 manufacturer part number on file: B4021700 (Spir-L-Ok Industries Canada Ltdcanada Culvert).
Key specifications for B4021700: Head Height: 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Thread Length: 0.480 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN. 14 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.