The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-133-6618, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Information and Electronic Systems Integration Inc.. Government technical data includes 18 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 | 5305-01-133-6618 |
| Primary Part Number | 1291-236 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bae Systems Information and Electronic Systems Integration Inc. |
| Status | ACTIVE |
| Head Height | 0.175 INCHES MINIMUM AND 0.175 INCHES MINIMUM AND 0.185 INCHES MAXIMUM0.185 INCHES MAXIMUM IN |
| Fastener Length | 3.535 INCHES MINIMUM AND 3.535 INCHES MINIMUM AND 3.545 INCHES MAXIMUM3.545 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALLMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.630 INCHES NOMINAL0.630 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.138 INCHES MINIMUM AND 0.138 INCHES MINIMUM AND 0.148 INCHES MAXIMUM0.148 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES0.190 INCHES IN |
| Head Style | FLAT CHAMFERFLAT CHAMFER |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 2.910 INCHES NOMINAL2.910 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 11 |
| Surface Treatment | OXIDE OVERALLOXIDE OVERALL |
| Internal Drive Style | SLOTSLOT |
| Thread Class | 3A3A |
| Thread Quantity Per Inch | 3232 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNFUNF |
| Head Diameter | 0.307 INCHES MINIMUM AND 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM0.317 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 |
|---|---|
| 1291-236 PRIMARY | Bae Systems Information and Electronic Systems Integration Inc. (USA) |
NSN 5305-01-133-6618 is a Screw,externally Relieved Body, manufactured by Bae Systems Information and Electronic Systems Integration Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-6618 has 1 manufacturer part number on file: 1291-236 (Bae Systems Information and Electronic Systems Integration Inc.).
Key specifications for 1291-236: Head Height: 0.175 INCHES MINIMUM AND 0.175 INCHES MINIMUM AND 0.185 INCHES MAXIMUM0.185 INCHES MAXIMUM IN; Fastener Length: 3.535 INCHES MINIMUM AND 3.535 INCHES MINIMUM AND 3.545 INCHES MAXIMUM3.545 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALLMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.630 INCHES NOMINAL0.630 INCHES NOMINAL IN. 18 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.