The Washer,concave, cataloged under National Stock Number 5310-00-404-3183, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-404-3183 |
| Primary Part Number | GB500A08A |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.174 INCHES NOMINAL IN |
| Heat Treatment | QUENCHED AND TEMPERED |
| Style Designator | CONCAVE |
| Outside Diameter | 0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Material Thickness | 0.060 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.214 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 |
|---|---|
| GB500A08A PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 74049-08 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GB500A08A | Esna, Llc (USA) |
| F4367-08 | Across Technologies Inc (USA) |
| K52300-08 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 952963-1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| F4367-8 | 5/9 Secondary reference Harvard Industries Inc |
| F4367-8 | 5/9 Secondary reference Amerace Corp Esna Div |
| GB500A08A | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5310-00-404-3183 is a Washer,concave, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-404-3183 has 5 manufacturer part numbers on file: GB500A08A (Northrop Grumman Systems Corporation), 74049-08 (Sps Technologies, Llc Dba PB Fasteners), GB500A08A (Esna, Llc), F4367-08 (Across Technologies Inc), K52300-08 (Howmet Global Fastening Systems Inc).
Key specifications for GB500A08A: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.174 INCHES NOMINAL IN; Heat Treatment: QUENCHED AND TEMPERED; Style Designator: CONCAVE. 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.