The Bolt,square Neck, cataloged under National Stock Number 5306-01-078-2719, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Prestolite Electric Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-078-2719 |
| Primary Part Number | 78997 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| Neck Length | 0.156 INCHES MINIMUM AND 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM0.187 INCHES MAXIMUM IN |
| Head Height | 0.156 INCHES MINIMUM AND 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM0.176 INCHES MAXIMUM IN |
| Fastener Length | 2.460 INCHES MINIMUM AND 2.460 INCHES MINIMUM AND 2.520 INCHES MAXIMUM2.520 INCHES MAXIMUM IN |
| Thread Length | 2.273 INCHES MINIMUM AND 2.273 INCHES MINIMUM AND 2.364 INCHES MAXIMUM2.364 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES0.312 INCHES IN |
| Head Style | BUTTONBUTTON |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Neck Width | 0.307 INCHES MINIMUM AND 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM0.324 INCHES MAXIMUM IN |
| Thread Class | 2A2A |
| Thread Quantity Per Inch | 1818 |
| Material | STEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.688 INCHES MINIMUM AND 0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM0.719 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 |
NSN 5306-01-078-2719 is a Bolt,square Neck, manufactured by Prestolite Electric Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-078-2719 has 2 manufacturer part numbers on file: 2AD69 (Oshkosh Defense Llc), 78997 (Prestolite Electric Inc).
Key specifications for 78997: Neck Length: 0.156 INCHES MINIMUM AND 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM0.187 INCHES MAXIMUM IN; Head Height: 0.156 INCHES MINIMUM AND 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM0.176 INCHES MAXIMUM IN; Fastener Length: 2.460 INCHES MINIMUM AND 2.460 INCHES MINIMUM AND 2.520 INCHES MAXIMUM2.520 INCHES MAXIMUM IN; Thread Length: 2.273 INCHES MINIMUM AND 2.273 INCHES MINIMUM AND 2.364 INCHES MAXIMUM2.364 INCHES MAXIMUM IN. 13 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.