The Bolt,shoulder, cataloged under National Stock Number 5306-01-187-3857, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Goodrich Corporation. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-187-3857 |
| Primary Part Number | 1881B177 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 3.125 INCHES NOMINAL IN |
| Shoulder Length | 2.590 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416 CL 1 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.875 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.535 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | MIL-S-8844 CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.250 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 200000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.9976 INCHES MINIMUM AND 0.9985 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 |
|---|---|
| 1881B177 | Es3 Prime Logistics Group Inc Dba Es3 Plg (USA) |
| 1881B177 PRIMARY | Goodrich Corporation (USA) |
| 1881B177 | Heroux-Devtek Inc (CAN) |
| 1881B177 | Hydromach Inc Dba Hydromach Inc (USA) |
| 1881B177 | Cm Manufacturing Inc Dba Cm Manufacturing Inc (USA) |
| 1881B177 | Quality Socket Screw Manufacturing Corp (USA) |
| 1881B177 | Berry Enterprises Inc (USA) |
| Reference | Meaning |
|---|---|
| 1881B177 | 5/9 Secondary reference All Tools, Inc. Dba E2 Precision Products |
| 1881B177 | 3/9 Design control — primary reference Goodrich Corporation Div Advanced Structures Landing Systems |
| 1881B177 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-187-3857 is a Bolt,shoulder, manufactured by Goodrich Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-187-3857 has 7 manufacturer part numbers on file: 1881B177 (Es3 Prime Logistics Group Inc Dba Es3 Plg), 1881B177 (Goodrich Corporation), 1881B177 (Heroux-Devtek Inc), 1881B177 (Hydromach Inc Dba Hydromach Inc), 1881B177 (Cm Manufacturing Inc Dba Cm Manufacturing Inc) and 2 more.
Key specifications for 1881B177: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 3.125 INCHES NOMINAL IN; Shoulder Length: 2.590 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416 CL 1 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.