The Bolt,shoulder, cataloged under National Stock Number 5306-01-035-3136, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Saturn Fasteners Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-035-3136 |
| Primary Part Number | 20-057-6-27D |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Saturn Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 2.251 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN |
| Shoulder Length | 0.020 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.523 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.603 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.558 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.044 INCHES MINIMUM AND 2.094 INCHES MAXIMUM FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 20-057-6-27D | Saturn Fasteners Inc (USA) |
| 20-057-6-27D | 3-V Fastener Co., Inc. (USA) |
| 20-057-6-27D | Heartland Precision Fasteners Inc (USA) |
| 20-057-6-27D | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 20-057-6-27D | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 20-057-6-27D | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 20-057-6-27D | Lfc Industries, Inc. (USA) |
| 20-057-6-27D | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 20-057-6-27D | Howmet Global Fastening Systems Inc (USA) |
| 20-057-6-27D | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| 20-057-6-27D | 5/9 Secondary reference U.S. Government activity |
| 20-057-6-27D | 5/9 Secondary reference Aerospace Rivet Mfrs Corp |
| 20-057-6-27D | 3/2 Design control — primary reference U.S. Government activity |
| 20-057-6-27D | 5/9 Secondary reference Huck International, Inc |
| 20-057-6-27D | 5/9 Secondary reference U.S. Government activity |
| 20-057-6-27D | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-035-3136 is a Bolt,shoulder, manufactured by Saturn Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-035-3136 has 10 manufacturer part numbers on file: 20-057-6-27D (Saturn Fasteners Inc), 20-057-6-27D (3-V Fastener Co., Inc.), 20-057-6-27D (Heartland Precision Fasteners Inc), 20-057-6-27D (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 20-057-6-27D (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 5 more.
Key specifications for 20-057-6-27D: Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 2.251 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN; Shoulder Length: 0.020 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416,TY2,CL2 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.