The Washer,keyway, cataloged under National Stock Number 5310-01-502-7531, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fastener Innovation Technology, Inc. Dba F I T. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-502-7531 |
| Primary Part Number | FIT7868RR |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fastener Innovation Technology, Inc. Dba F I T |
| Status | ACTIVE |
| Internal Straight Key Width | 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.053 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-25043 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS5528 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.310 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN |
| Material Thickness | 0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 631 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 0.197 INCHES MINIMUM AND 0.205 INCHES MAXIMUM 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 |
|---|---|
| FIT7868RR PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 3D0325-3R | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-502-7531 is a Washer,keyway, manufactured by Fastener Innovation Technology, Inc. Dba F I T, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-502-7531 has 1 manufacturer part number on file: FIT7868RR (Fastener Innovation Technology, Inc. Dba F I T).
Key specifications for FIT7868RR: Internal Straight Key Width: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.053 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: KEY. 11 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.