The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-124-5771, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-124-5771 |
| Primary Part Number | CA12020-1A |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Head Height | 0.240 INCHES NOMINAL IN |
| Fastener Length | 1.385 INCHES NOMINAL IN |
| Thread Length | 0.792 INCHES NOMINAL IN |
| First Diameter From Head | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.543 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.593 INCHES NOMINAL IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.200 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.343 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Third Diameter From Head | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| Head Diameter | 0.490 INCHES MINIMUM AND 0.500 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 |
|---|---|
| 7118-1C | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| CA12020-1A PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| CA12020-1 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Tridair Products |
| 971229-1C | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5306-01-124-5771 is a Bolt,internal Wrenching, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-124-5771 has 2 manufacturer part numbers on file: 7118-1C (Fastener Innovation Technology, Inc. Dba F I T), CA12020-1A (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CA12020-1A: Head Height: 0.240 INCHES NOMINAL IN; Fastener Length: 1.385 INCHES NOMINAL IN; Thread Length: 0.792 INCHES NOMINAL IN; First Diameter From Head: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN. 17 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.