The Bolt,shoulder, cataloged under National Stock Number 5306-00-890-0883, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-890-0883 |
| Primary Part Number | A51B21636-11 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Head Height | 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Fastener Length | 1.798 INCHES MINIMUM AND 1.813 INCHES MAXIMUM IN |
| Shoulder Length | 1.125 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.375 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 630 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| A51B21636-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| A51B21636-11 | S & L Aerospace Metals Llc (USA) |
| Reference | Meaning |
|---|---|
| A51B21636-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51B21636-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5306-00-890-0883 is a Bolt,shoulder, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-890-0883 has 2 manufacturer part numbers on file: A51B21636-11 (Northrop Grumman Systems Corporation), A51B21636-11 (S & L Aerospace Metals Llc).
Key specifications for A51B21636-11: Head Height: 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Fastener Length: 1.798 INCHES MINIMUM AND 1.813 INCHES MAXIMUM IN; Shoulder Length: 1.125 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.