The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-494-6869, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Moog Inc. Dba Ampac-Isp Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-494-6869 |
| Primary Part Number | 37559-221 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Moog Inc. Dba Ampac-Isp Corp |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Head Height | 0.438 INCHES MAXIMUM IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Thread Length | 1.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH OR PELLET OR STRIP THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.656 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 |
|---|---|
| CB29124-221 | Moog Inc. Dba Ampac-Isp Corp (USA) |
| 37559-221 PRIMARY | Moog Inc. Dba Ampac-Isp Corp (USA) |
| LA53-40595 ITEM 23 PRIMARY | Moog Inc. Dba Ampac-Isp Corp (USA) |
| Reference | Meaning |
|---|---|
| 0.438-14UNC-3AX1.000LG NICUAL | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-494-6869 is a Screw,cap,socket Head, manufactured by Moog Inc. Dba Ampac-Isp Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-494-6869 has 3 manufacturer part numbers on file: CB29124-221 (Moog Inc. Dba Ampac-Isp Corp), 37559-221 (Moog Inc. Dba Ampac-Isp Corp), LA53-40595 ITEM 23 (Moog Inc. Dba Ampac-Isp Corp).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-494-6936. Verify interchangeability with system specifications before substitution.
Key specifications for 37559-221: Width Across Flats: 0.375 INCHES NOMINAL IN; Head Height: 0.438 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES NOMINAL IN; Thread Length: 1.000 INCHES NOMINAL IN. 15 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.