The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-541-4120, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-541-4120 |
| Primary Part Number | 3M1277E4D10A |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.057 INCHES NOMINAL IN |
| Fastener Length | 1.135 INCHES MINIMUM AND 1.165 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-L-87132,TY 1,GR B W/CETYL ALCOHOL MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.410 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.558 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN |
| Grip Diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.358 INCHES MINIMUM AND 0.365 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 |
|---|---|
| 3M1277E4D10A PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| TX1027E4D10XA | 5/9 Secondary reference Hi-Shear Corporation |
| TX1027E4D10XA | 5/9 Secondary reference Sps Technologies Inc |
| TX1027E4D10XA | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| TX1027E4D10XA | 5/9 Secondary reference U.S. Government activity |
| TX1027E4D10XA | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 11861E4D10A | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| TX1027E4D10XA | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| TX1027E4D10XA | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| TX1027E4D10XA | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
NSN 5306-01-541-4120 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-541-4120 has 1 manufacturer part number on file: 3M1277E4D10A (The Boeing Company Div Defense).
Key specifications for 3M1277E4D10A: Head Height: 0.057 INCHES NOMINAL IN; Fastener Length: 1.135 INCHES MINIMUM AND 1.165 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-L-87132,TY 1,GR B W/CETYL ALCOHOL MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.410 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN. 16 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.