The Washer,split, cataloged under National Stock Number 5310-01-178-5030, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-178-5030 |
| Primary Part Number | HS4432-1 |
| Item Name | Washer,split |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TYPEII,CLASS2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance Across Split Opening | 0.020 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Style Designator | SPLIT |
| Material Document and Classification | ASTMA682 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA681 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.312 INCHES NOMINAL IN |
| Material Thickness | 0.014 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 1095 OVERALL |
| Hole Diameter | 0.156 INCHES NOMINAL 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 |
|---|---|
| 2600SW2 | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
| HS4432-1 PRIMARY | The Boeing Company (USA) |
| 1127723 PRIMARY | Monadnock Company, the Dba Lisi Aerospace (USA) |
| HS4432-1 | Anillo Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 3D0050-1 | 5/9 Secondary reference U.S. Government activity |
| HS4432-1 | 3/9 Design control — primary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 5310-01-178-5030 is a Washer,split, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-178-5030 has 4 manufacturer part numbers on file: 2600SW2 (Howmet Global Fastening Systems Inc Div Camloc Products), HS4432-1 (The Boeing Company), 1127723 (Monadnock Company, the Dba Lisi Aerospace), HS4432-1 (Anillo Industries Llc).
Key specifications for HS4432-1: Surface Treatment Document and Classification: QQ-P-416,TYPEII,CLASS2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance Across Split Opening: 0.020 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN; Style Designator: SPLIT; Material Document and Classification: ASTMA682 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA681 ASSN STD 2ND MATERIAL RESPONSE OVERALL. 9 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.