The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-258-9102, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Howmet Global Fastening Systems Inc. Div Tridair Products (CAGE 29372) |
| Parameter | Value |
|---|---|
| NSN | 5306-01-258-9102 |
| Primary Part Number | CA21165-4-2HS |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Fastener Length | 0.827 INCHES MINIMUM AND 0.847 INCHES MAXIMUM IN |
| Concentric Hole Depth | 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Thread Length | 0.537 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Concentric Hole Diameter | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP 8740 OVERALL |
| 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 |
|---|---|
| CA21165-4-2HS PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| CA21165-4-2 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc. Div Tridair Products |
NSN 5306-01-258-9102 is a Bolt,internally Relieved Body, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-258-9102 has 1 manufacturer part number on file: CA21165-4-2HS (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CA21165-4-2HS: Fastener Length: 0.827 INCHES MINIMUM AND 0.847 INCHES MAXIMUM IN; Concentric Hole Depth: 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Thread Length: 0.537 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN. 10 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.