The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-283-2420, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-283-2420 |
| Primary Part Number | CA21160-4-4HS |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Width Across Flats | 0.1409 INCHES MINIMUM AND 0.1426 INCHES MAXIMUM IN |
| Fastener Length | 1.102 INCHES MINIMUM AND 1.122 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.672 INCHES MINIMUM AND 0.831 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE FASTENER |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 FASTENER |
| Thread Series Designator | UNF |
| Head Diameter | 0.375 INCHES MINIMUM AND 0.385 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 |
|---|---|
| CA21160-4-4HS PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| 717801664-001 | Lockheed Martin Corporation (USA) |
NSN 5306-01-283-2420 is a Bolt,internal Wrenching, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-283-2420 has 2 manufacturer part numbers on file: CA21160-4-4HS (Howmet Global Fastening Systems Inc. Div Tridair Products), 717801664-001 (Lockheed Martin Corporation).
Key specifications for CA21160-4-4HS: Width Across Flats: 0.1409 INCHES MINIMUM AND 0.1426 INCHES MAXIMUM IN; Fastener Length: 1.102 INCHES MINIMUM AND 1.122 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER; Thread Length: 0.672 INCHES MINIMUM AND 0.831 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.