The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-628-5475, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-628-5475 |
| Primary Part Number | 3M1277E5D4A |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.065 INCHES NOMINAL IN |
| Fastener Length | 0.704 INCHES MINIMUM AND 0.734 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 | 0.250 INCHES NOMINAL IN |
| Grip Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM IN |
| Nonstandard Thread Pitch Diameter | +0.2827 TO 0.2854 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 0.086 INCHES MAXIMUM IN |
| Head Diameter | 0.4645 INCHES MINIMUM AND 0.4739 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 |
|---|---|
| 3M1277E5D4A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1277E5D4A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M1277E5D4A PRIMARY | Saturn Fasteners Inc (USA) |
| 11861E5D4A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027E5D4A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1027E5D4A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| WC1277E5D4A PRIMARY | West Coast Aerospace, Inc. (USA) |
| 3M1277E5D4A PRIMARY | Camcar Llc Div Camcar Llc (USA) |
| TX1027E5D4A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1277E5D4A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1277E5D4A PRIMARY | Houston Precision Fasteners I Lp (USA) |
| 3M1277E5D4A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1027E5D4A PRIMARY | Hi-Shear Corporation (USA) |
| TX1027E5D4A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| TX1027E5D4A | 3/2 Design control — primary reference U.S. Government activity |
| 3M1277E5D4A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-01-628-5475 is a Bolt,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-628-5475 has 14 manufacturer part numbers on file: 3M1277E5D4A (Heartland Precision Fasteners Inc), 3M1277E5D4A (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M1277E5D4A (Saturn Fasteners Inc), 11861E5D4A (Reid Products Inc. Dba Reid Products Inc), TX1027E5D4A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 9 more.
Key specifications for 3M1277E5D4A: Head Height: 0.065 INCHES NOMINAL IN; Fastener Length: 0.704 INCHES MINIMUM AND 0.734 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.