The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-628-5490, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-628-5490 |
| Primary Part Number | TX1026E5D20A |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.120 INCHES NOMINAL IN |
| Fastener Length | 1.704 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.250 INCHES NOMINAL IN |
| Grip Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM IN |
| Nonstandard Thread Pitch Diameter | +0.3450 TO 0.3479 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY 718 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.076 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Head Diameter | 0.6230 INCHES MINIMUM AND 0.6335 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 | Y |
| Part Number | Manufacturer |
|---|---|
| TX1026E5D20A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 3M1275E5D20A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1026E5D20A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1026E5D20A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1026E5D20A PRIMARY | Hi-Shear Corporation (USA) |
| TX1026E5D20A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| TX1026E5D20A | 3/2 Design control — primary reference U.S. Government activity |
| 3M1275E5D20A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-01-628-5490 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-628-5490 has 6 manufacturer part numbers on file: TX1026E5D20A (Howmet Global Fastening Systems Inc), 3M1275E5D20A (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), TX1026E5D20A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), TX1026E5D20A (Sps Technologies, Llc Dba PB Fasteners), TX1026E5D20A (Hi-Shear Corporation) and 1 more.
Key specifications for TX1026E5D20A: Head Height: 0.120 INCHES NOMINAL IN; Fastener Length: 1.704 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN; Thread Length: 0.469 INCHES NOMINAL IN; Criticality Code Justification: AGAV. 22 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.