The Washer,recessed, cataloged under National Stock Number 5310-00-855-2043, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-855-2043 |
| Primary Part Number | 6864043 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OR 24.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | AMS5621 ASSN STD ALL MATERIAL RESPONSES OR AMS5628 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.618 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN |
| Material Thickness | 0.070 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN |
| Recess Diameter | 0.297 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.257 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Recess Angle | 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-00-855-2043 is a Washer,recessed, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-855-2043 has 3 manufacturer part numbers on file: 6864043 (Rolls-Royce Airlines), K11704 (Rolls-Royce Airlines), 6864043 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6864043: Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OR 24.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM; Style Designator: RECESSED; Material Document and Classification: AMS5621 ASSN STD ALL MATERIAL RESPONSES OR AMS5628 ASSN STD ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 0.618 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN. 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.