The Washer,concave, cataloged under National Stock Number 5310-00-277-9335, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-277-9335 |
| Primary Part Number | SW2000-12W |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Radius | 0.380 INCHES NOMINAL IN |
| Style Designator | CONCAVE |
| Outside Diameter | 0.675 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN |
| Material Thickness | 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.490 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 |
|---|---|
| SW2000-12W PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MM135-6 PRIMARY | Moeller Manufacturing & Supply, Llc (USA) |
| SW2000-12W PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| SW2000-12W PRIMARY | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| ST3M683-6 | Moeller Manufacturing & Supply, Llc (USA) |
| SW2000-12W PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 10121240 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M683-6 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| SW2000-12W | 5/9 Secondary reference U.S. Government activity |
| SW2000-12W | 3/2 Design control — primary reference U.S. Government activity |
| SW2000-12W | 5/9 Secondary reference Sps Technologies Inc |
NSN 5310-00-277-9335 is a Washer,concave, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-277-9335 has 6 manufacturer part numbers on file: SW2000-12W (Sps Technologies, Llc Dba PB Fasteners), MM135-6 (Moeller Manufacturing & Supply, Llc), SW2000-12W (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), SW2000-12W (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), ST3M683-6 (Moeller Manufacturing & Supply, Llc) and 1 more.
Key specifications for SW2000-12W: Radius: 0.380 INCHES NOMINAL IN; Style Designator: CONCAVE; Outside Diameter: 0.675 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN; Material Thickness: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN. 6 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.