The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-515-1337, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bisco Industries, Inc. Div Bisco Industries. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-515-1337 |
| Primary Part Number | 172-11-SS-1/4-20-Z |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bisco Industries, Inc. Div Bisco Industries |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.250 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 3 |
| Thread Direction | RIGHT-HAND |
| Externally Relieved Body Diameter Quantity | 1 |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 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 |
|---|---|
| 172-11-SS-1/4-20-Z PRIMARY | Bisco Industries, Inc. Div Bisco Industries (USA) |
NSN 5305-01-515-1337 is a Screw,externally Relieved Body, manufactured by Bisco Industries, Inc. Div Bisco Industries, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-515-1337 has 1 manufacturer part number on file: 172-11-SS-1/4-20-Z (Bisco Industries, Inc. Div Bisco Industries).
Key specifications for 172-11-SS-1/4-20-Z: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.250 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN; Head Style: KNURLED NO. 3. 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.