The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-026-5778, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Ge Aviation Systems Llc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-026-5778 |
| Primary Part Number | 33AF1221-04-08 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Spline Minor Diameter | 0.096 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN |
| Head Height | 0.112 INCHES MAXIMUM IN |
| Fastener Length | 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN |
| Spline Width | 0.023 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Thread Length | 0.434 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.113 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | SIX SPLINE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 302 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.173 INCHES MINIMUM AND 0.183 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 |
|---|---|
| 33AF1221-04-08 PRIMARY | Ge Aviation Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 33AF1221-04-08 | C/1 Advisory reference — outside the item-of-supply concept Ge Aviation Systems Ltd |
| NDN8462-32ND18 | 5/9 Secondary reference Smiths Aerospace (customer Services Division) |
| 33AF1221-04-08 | 5/9 Secondary reference Smiths Aerospace (customer Services Division) |
| NDN8462-32ND18 | C/1 Advisory reference — outside the item-of-supply concept Ge Aviation Systems Ltd |
NSN 5305-01-026-5778 is a Screw,cap,socket Head, manufactured by Ge Aviation Systems Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-026-5778 has 1 manufacturer part number on file: 33AF1221-04-08 (Ge Aviation Systems Llc).
Key specifications for 33AF1221-04-08: Spline Minor Diameter: 0.096 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN; Head Height: 0.112 INCHES MAXIMUM IN; Fastener Length: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN; Spline Width: 0.023 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN. 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.