The Washer,flat, cataloged under National Stock Number 5310-00-288-3434, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-288-3434 |
| Primary Part Number | HL776-10PBW |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.635 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5520 ASSN STD 1ST MATERIAL RESPONSE OR AMS5643 ASSN STD 2ND MATERIAL RESPONSE OR AMS5528 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 632 OR STEEL COMP 630 OR STEEL COMP 631 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.453 INCHES NOMINAL IN |
| Thickness | 0.160 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 |
|---|---|
| HL776-10PBW PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HL776-10PBW PRIMARY | Hi-Shear Corporation (USA) |
| HL776-10PBW | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HL776-10PBW | 5/2 Secondary reference U.S. Government activity |
| HL776-10PBW | 5/9 Secondary reference Sps Technologies Inc |
NSN 5310-00-288-3434 is a Washer,flat, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-288-3434 has 3 manufacturer part numbers on file: HL776-10PBW (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HL776-10PBW (Hi-Shear Corporation), HL776-10PBW (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for HL776-10PBW: Surface Treatment Document and Classification: QQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.635 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN; Material Document and Classification: AMS5520 ASSN STD 1ST MATERIAL RESPONSE OR AMS5643 ASSN STD 2ND MATERIAL RESPONSE OR AMS5528 ASSN STD 3RD MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.