The Washer,key, cataloged under National Stock Number 5310-00-272-4112, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Gast Mfg Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-272-4112 |
| Primary Part Number | AB124A |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Gast Mfg Corp |
| Status | ACTIVE |
| Internal Straight Key Width | 0.135 INCHES NOMINAL0.135 INCHES NOMINAL IN |
| Distance From Centerline to Top of Internal Key | 0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN |
| Overall Distance Including Keys | 1.438 INCHES NOMINAL1.438 INCHES NOMINAL IN |
| Style Designator | KEYKEY |
| Outside Diameter | 1.125 INCHES NOMINAL1.125 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL0.032 INCHES NOMINAL IN |
| External Straight Key Width | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| External Key Quantity | 44 |
| Material | STEEL OVERALL |
| Internal Key Quantity | 11 |
| Hole Diameter | 0.750 INCHES NOMINAL0.750 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 |
|---|---|
| AB124A PRIMARY | Gast Mfg Corp (USA) |
NSN 5310-00-272-4112 is a Washer,key, manufactured by Gast Mfg Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-272-4112 has 1 manufacturer part number on file: AB124A (Gast Mfg Corp).
Key specifications for AB124A: Internal Straight Key Width: 0.135 INCHES NOMINAL0.135 INCHES NOMINAL IN; Distance From Centerline to Top of Internal Key: 0.219 INCHES NOMINAL0.219 INCHES NOMINAL IN; Overall Distance Including Keys: 1.438 INCHES NOMINAL1.438 INCHES NOMINAL IN; Style Designator: KEYKEY. 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.