The Bolt,shoulder, cataloged under National Stock Number 5306-01-140-8833, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Bristol Industries, Llc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-140-8833 |
| Primary Part Number | 2178425 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.070 INCHES MINIMUM IN |
| Head Height | 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN |
| Fastener Length | 0.713 INCHES MINIMUM AND 0.733 INCHES MAXIMUM IN |
| Shoulder Length | 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM FIRST SHOULDER IN |
| Extended Washer Diameter | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.3150 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.508 INCHES MINIMUM AND 0.538 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | AMS 5754 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.375 INCHES NOMINAL IN |
| Nonstandard Thread Pitch Diameter | +0.2707 TO 0.2739 INCHES IN |
| Thread Quantity Per Inch | 18 |
| Material | NICKEL ALLOY OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNS |
| Hole Type | DRILLED |
| Hole Diameter | 0.060 INCHES MINIMUM AND 0.080 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 |
|---|---|
| 2178425 | Bristol Industries, Llc (USA) |
| 2178425 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| 2178425 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 2178425 | 5/9 Secondary reference Blanc Aircraft Fasteners Inc |
| 2178425 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 2178425 | 5/9 Secondary reference North Bridge Fasteners Div of North Bridge Ltd |
| 2178425 | 5/9 Secondary reference Mecair Aerospace Industries Inc Sub of Mecair Inc |
| 2178425 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-140-8833 is a Bolt,shoulder, manufactured by Bristol Industries, Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-140-8833 has 3 manufacturer part numbers on file: 2178425 (Bristol Industries, Llc), 2178425 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), 2178425 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 2178425: Extended Washer Thickness: 0.070 INCHES MINIMUM IN; Head Height: 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN; Fastener Length: 0.713 INCHES MINIMUM AND 0.733 INCHES MAXIMUM IN; Shoulder Length: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM FIRST SHOULDER IN. 21 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.