The Bolt,shear, cataloged under National Stock Number 5306-01-376-5279, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 22 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-376-5279 |
| Primary Part Number | SS5211-12-26 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Head Height | 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN |
| Fastener Length | 2.727 INCHES MINIMUM AND 2.759 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS2401 ASSN STD 1ST TREATMENT RESPONSE OR QQ-P-416 TY 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN |
| Thread Length | 1.118 INCHES NOMINAL IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-8844 CL1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.798 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN |
| Grip Diameter | 0.7480 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4340 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 |
|---|---|
| SS5211-12-26 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| SS5211-12-26 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| SS5211-12-26 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| SS5211-12-26 | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| SS5211-12-26 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| SS5211-12-26 | Acufast Aircraft Products (USA) |
| SS5211-12-26 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| SS5211-12-26 | 5/2 Secondary reference U.S. Government activity |
| SS5211-12-26 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| SS5211-12-26 | 5/2 Secondary reference U.S. Government activity |
| SS5211-12-26 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-376-5279 is a Bolt,shear, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-376-5279 has 7 manufacturer part numbers on file: SS5211-12-26 (Sps Technologies, Llc Dba PB Fasteners), SS5211-12-26 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), SS5211-12-26 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), SS5211-12-26 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), SS5211-12-26 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp) and 2 more.
Key specifications for SS5211-12-26: Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Head Height: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN. 22 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.