The Washer,split, cataloged under National Stock Number 5310-01-223-7697, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-223-7697 |
| Primary Part Number | BYLB407 |
| Item Name | Washer,split |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Distance Across Split Opening | 0.008 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C NOMINAL |
| Style Designator | SPLIT |
| Material Document and Classification | AMS 5644 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.3750 INCHES MINIMUM AND 4.3755 INCHES MAXIMUM IN |
| Material Thickness | 0.029 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Material | STEEL COMP 631 OVERALL |
| Hole Diameter | 3.9955 INCHES MINIMUM AND 4.0050 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 |
|---|---|
| BYLB407 | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| BYLB407 | 3/2 Design control — primary reference U.S. Government activity |
| BYLB407 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-223-7697 is a Washer,split, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-223-7697 has 1 manufacturer part number on file: BYLB407 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for BYLB407: Distance Across Split Opening: 0.008 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN; Hardness Rating: 39.0 ROCKWELL C NOMINAL; Style Designator: SPLIT; Material Document and Classification: AMS 5644 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 8 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.